Well, I have not once found a single case where an app reacting to screenshots and controlling the process in any way was anything to me but hostile and annoying. This one does not help.
It somehow is perfect example of how modern software engineering feels to go astray for me. A feature in my device working completely in benefit of the one providing said software. I wish, and wish only I can, that this trend goes away at some point.
It is actually astonishing to me that this is not something which can be turned off at the OS level, or as a permission setting in the app permissions.
The app knowing I took a screenshot feels adjacent to me to a keylogger. Imagine how many apps are capturing that information silently. To my mind, a screenshot is something that is happening outside of the app context, the app knowing about it is a security flaw imo.
> The app knowing I took a screenshot feels adjacent to me to a keylogger.
To my knowledge, this is a misunderstanding.
The app does not know that you are taking a screenshot, rather iOS knows you are taking a screenshot (as it must) and is excluding an element on display that has been designated by the developer as sensitive information.
This is the same technology that prevents you from accidentally screenshotting your password manager; the developer has simply performed a nifty trick to display a small icon behind where the “follow” button would otherwise be displayed.
There are plenty of instances where this sort of thing can be annoying, such as when you try to screenshot a streaming service app and DRM enforcement leaves you with a blank screenshot, but IMO this particular instance is actually very tasteful; seeing “follow” on every screenshotted post is just useless noise, but a small unobtrusive platform icon is a useful reminder that the post came from Bluesky and not another very visually similar service like X(cancel) or Mastodon.
> This is the same technology that prevents you from accidentally screenshotting your password manager
Yes, and I would say it's a bad thing that the OS tries to prevent this.
> seeing “follow” on every screenshotted post is just useless noise, but a small unobtrusive platform icon is a useful reminder that the post came from Bluesky and not another very visually similar service like X(cancel) or Mastodon.
I would say it's a bad thing that Bluesky makes the screenshot look different from what was on screen for the user. If I cared about excluding the "useless noise" from a faithful depiction of the pixels on my screen, I could address that myself.
"The app does not know that you are taking a screenshot, rather iOS knows you are taking a screenshot (as it must) and is excluding an element on display that has been designated by the developer as sensitive information. This is the same technology that prevents you from accidentally screenshotting your password manager"
And that is reasonable, but it is also a surface where an app touches the OS, which should be a permission boundary that I can control. Allowing the option to opt-out of screenshot blocking with a proper double-confirm warning and biometric auth is also reasonable.
Neither of those use cases seem good or tasteful to me as a user, I don't think this concept of "secure (from the user) context" should exist, but maybe that's just me
> The app knowing I took a screenshot feels adjacent to me to a keylogger.
That is what this article is about and why you should read it before commenting. The whole point is that it doesn't need to know you're taking screenshots. That's why it's a clever trick.
I guess it would need permissions, but you can monitor the photo library with PHPhotoLibraryChangeObserver and check if a new item's subtype is photoScreenshot.
Otherwise userDidTakeScreenshotNotification only fires for your own app
but you didn't read the part where the mechanism is explained? it doesn't do anything like capturing information. it just marks a button "sensitive" causing it to be hidden in a screenshot, thus revealing an icon that was put there underneath the button.
Did you read the article? Bluesky doesn't know you're taking a screenshot, iOS just hides the follow button in the screenshot (consequently making the Bluesky logo visible).
> Please don't comment on whether someone read an article. "Did you even read the article? It mentions that" can be shortened to "The article mentions that".
Found in the HN commenting guidelines, linked at the bottom of most pages
If someone from Google Maps or LinkedIn team is here, please, when I take a screenshot it's because I want to a screenshot, not share the friggin location/post.
Not sure who got the idea that it was useful, it isn't.
I would happily use the Google Maps "share" feature, but I've yet to encounter any but the simplest of scenarios where it actually preserves the entire context of what I'm trying to share: the viewport, the start and destination, stops along the way, route choice, the time of day, all of it.
If I'm sending a screenshot it's because I want to send exactly what I see on my screen and not have my recipient's gmaps instance happily recompute a route it thinks is better or leave out the routing information I included, or switch from biking to driving directions, or whatever else.
It's of course about lock-in. In the early Web-GIS era there were a few competing but popular notation standards for sharing lat/lon/zoom/<sometimes more> that was meant to be human readable and compatible with any WMS or similar.
Ah... to imagine a world where you could just share a coordinate string and people could open it in whatever map app/page they wanted. Geo URI is probably the closest we have today but I don't think much of anything outside the OS Geo community accepts it.
I think that's actually a separate issue. What I specifically want from a Google Maps share URL is for it to be something I can send over text that will reproduce for my recipient exactly what I see.
A lat/lon/zoom/start?/dest? is kind of what a Google Maps share currently is, but it's neither an interoperable standard nor a reliable capture of the current state, so really the worst of both worlds.
Hi! I think I’m on the same page (give or take a zoom level) now. That is hard to do between separate geodatabases (hence CRS, placenames, geocoding, etc.) but Google isn’t even doing it within their own. And the only way I can obtain a link is to first place a pin, which wants to snap to nearby features. If I try to link a nice trail near my home it snaps to the quarry instead, making me look like a maniac with a terrible idea of what a “quiet walk” looks like.
From the same lunacy that forces me to write my 30-something character Wi-Fi password on a "secure password field" that only shows me the last character, almost ensuring that I will make an unlimited number of typos and spend way too much time for something that should only take 30 seconds.
It's not clear who it is protecting against, it does not seem to be effective at protecting against anything at all, it is actively annoying to the user, and has no way to disable. Perfect example of the usual "security theater" feature.
Unsecure: open Shortcuts, tap Gallery, search “Adjust Clipboard”. Add to Action Button folder and run from Action Button. - Or add “Dismiss Siri and Continue” action after “Get Clipboard” so you can say “Siri, Adjust Clipboard”.
Type in the still-unreasonably small window, tap Done, paste password. (Then clear clipboard I suppose and consider privacy implication if your clipboard syncs to Mac.)
Apple gave too much power to iOS developers. They can use DRM strong enough that when your iPhone is open in iPhone Mirroring on your Mac, and you record your Mac screen with a third-party tool, the iPhone screen is blacked out.
Good thing if you have GMaps open to the directions list while driving and tell Siri to take a screenshot, it doesn’t throw up a full page of nonsense over your directions that only Voice Control (not Siri alone) or a [potentially nonexistent] passenger could close.
Did you read the post? Nothing is hijacked, but its a trick where they render the normal button in a ui element for secret data, which is blanked by the system on screenshot, revealing the logo underneath. Its a reasonable feature, so its hard for apple to control it better or remove this.
That is a lot of words just to make it sound reasonable that a page can be exempt from the underlying screenshot functionality. It isn't. Not without asking the user.
No, it’s not a reasonable feature. If I take a screenshot, I want the image to include what is displayed on my fucking screen, period. What is so difficult about this?
Side note- The Screenshot culture itself needs to die, sorry. Many a time, a share button simply works. I don’t know why people would share a screenshot or a map instead of pin and share their location. Yes there are cases where a screenshot helps but majority cases simply is “come to this place” a which turns out to make more difficult because people apparently don’t know how to share locations with pin and share!
Screenshots are much better for archival. So many times you go back to a url/link you shared, and poof it's gone or the content has changed from when you sent it.
Screenshots allows you to get a point in time reference to what you are sharing.
The ideal "World Wide Web" envisioned by it's original design, was that a URI was a durable pointer to an immutable piece of information.
In 2026, we now know that the information can be edited, or completely removed for many reasons, some legitimate, and some nefarious.
Taking a screenshot is the easiest way to ensure the original is kept for folks to see. Frankly, it'd be even better if (a) the app can signal to the OS information about the url to the page for the screenshot, (b) timestamps were captured in the image and not cropped, and (c) the OS can authenticate the screen shot and digitally sign that it came from an unaltered device.
When I take a screenshot in ChatGPT, it shows a "share this chat?" toast at the top.
The toast shows up after the screenshot, but my phones's long screenshot feature captures the top part a second time, so the top part of the chat becomes unreadable.
Boomer and/or car-dealership employee here, I take screenshots by taking a picture with my 2nd phone. Never had a problem with whatever you all are talking about.
I also despise this "screenshot blocking" stuff. A device listens is supposed to me, not to the apps. I want a screenshot to be a copy of the raw pixels, and an app should not know about it or have a right to know about it.
Of course this is doable on open source OSes like GrapheneOS, it just sucks that you have to keep modifying the OS every time they release a new version
If it's between this and a perpetual logo, I'll take this any day.
I actually really like this approach. The action button isn't relevant in this context, and it doesn't occlude the content.
There's certainly situations where you wouldn't want this (ie if you're developing the app and you want to redesign starting from a screenshot), but for the average user I think this isn't overly hostile. I understand that people are dogmatically opposed to intent being modified, but I think you need to balance nuance. I actually enjoy having an attributable source in shared elements, and I think this is a low-impact way of achieving that.
No need to set up a false choice as a straw man to knock down.
It is user hostile.
You're just defending Bluesky because you're on the same team politically. If the subject of this headline was X (an app that does the same thing, which I also don't agree with) everyone here would be seething with rage.
This is phone OS developer's fault for even allowing it. When I take a screenshot, I expect to have an image of exactly whatever was displayed on the screen at the time. Its not a picture of your app, its a picture of my screen. Some banking apps used to (or still) prevent this and now some apps get a hook to insert their branding. My device serves some master other than myself.
I'm confused why people are mad at Bluesky for this. Everyone stating their issues seems more related to Apple than Bluesky. So why point the finger at them?
This is in fact a watermark to promote the application, which otherwise wouldn't be recognizable since Bluesky looks like every other microblogging app. I didn't know that Sam literally named the file GrowthHack.tsx, which is pretty funny.
Nobody in the comments talking about snapchat where like one of the core pillars of what "sets their service apart" is the difficulty of taking a screenshot without notifying the other party
Wasn’t that the entire premise of the product when it launched? Disappearing messages and minimal footprint so you could be confident your communications were semi-private?
That was the expectation of using the product so it fits and isn’t anything like this discussion.
If not for the function being named "GrowthHack" I would have thought that hiding following status for screenshots to be a good privacy measure. They don't use it to hide anything else and since I'm not a user of the app I don't know if there is more extraneous information that could be used to infer or track down who screenshotted and they don't hide.
They shouldn't even disallow screenshots from a security measure. If the user wants to take a screenshot of their bank account info or a password manager they should. Maybe an additional permission for screenshare. No device has protection against a second device taking a recording so it's really just security theater
Tangentially, I see a lot of people here upset that apps can react to your screenshot before it is captured. I think it is helpful to think about it as a tradeoff between freedoms:
(a) the freedom to screenshot any content on your own device
(b) the freedom to share content with others that cannot be screenshotted
It can be annoying when DRM or privacy features block a screenshot, but I think it can also benefit the platform ecosystem that you participate in as a user too. Idk!
This sort of stuff to me is an example of fear within an organization. Whenever I see engineering resources allocated towards self promotion and branding rather than quality and features for its users it shows how leaders want control over narratives.
It's probably silly to make OP's judgement of any of these implementations in isolation, but you can sense a real fear about the growth (or lack thereof) inside Bluesky. Fiddling with the presented metrics (likes count getting moved ahead of reposts), promoting total user signups while being silent on collapsing DAUs. They are promising a lot at once with AI custom feeds from Attie and subreddit-style communities that smells like feature creep.
That's how a modern organization works. You trust your colleagues will do good work, and will ship something useful and there's not really "someone to go through".
I agree this can be defined as cool and very very likely someone did this on their free time/prompted Claude on the side.
It's a Series B company, it needs to make money, and they have to answer to a board and provide information to investors. They have a roadmap, direction, and leadership. Yes, trust and good intentions is an awesome thing and I hope they have that indeed, but I would think reality lies in the middle of both sides.
I've worked at a Series B company and reality is this is too minor for investors to care on its own, and it's also very hard to correlate this change to new revenue, so not something that's likely to have been done with that intention
I agree that having less people to manage means easier to build trust relationships and culture, though I believe some form of management and control must exist.
Someone spending half a day on a feature that places the app's logo in the screenshot so people seeing it can know where it came from is "fear within an organization"? You've got to be kidding lol
Related: Airplay Screen Mirroring being too damn cleaver for its own good. Yes, I want to mirror my screen, and no I don't want the app to enforce it's own controls/blocks on what is being displayed on the external screen (Looking at all the streaming apps).
It's bad UX all around:
- iOS claims it mirrors my screen (It does not)
- Except when it does mirror my screen (Depending on the app!)
To be clear, I do think it's nice to beam the video directly to the target device for better quality, but that's not what screen mirroring is!
No because per default the input is not cleared when screenshotting. If you‘d implement this yourself for security reasons you'd most likely blur / overlay the whole screen when the app enters background state.
Probably, but to the extent that was at all a problem to begin with, multiply it by another 0.0001 or whatever for the threat of the screenshot being taken mid switch away!
If the feature can sometimes be useful (including this situation, which some other comments mentioned; but also for other things such as hiding actual secure data), then perhaps it should be made as a setting which can be changed in the setting menu (e.g. "Exclude secure data from screenshots"; it should also mention which apps use this feature), so prevent abuse. (This would also make it clear what the feature is, as well as being able to disable it.)
The logo is actually decentralized, we just host it on our centralized “relay”. It’s basically open tho.
We use “Zero Knowledge Pixels” so no images can be leaked onto the dark web where all the criminals live.
The way it works is, as long as our content is so moderated to hell, most dark web hosts avoid crawling us entirely. It’s just not that interesting of content. Which means it’s safe content. Safety first, I always say.
So we listened to the feedback from our dozens of users and put all watermark images on the blockchain so it’s instantly federated and backed up in a vault in Antarctica. We call it the “Waterhose”. When an image reaches the vault, it becomes “frozen” and only an admin can “thaw” the data.
It’s all backed up with proofs. By people way smarter than you lol
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It somehow is perfect example of how modern software engineering feels to go astray for me. A feature in my device working completely in benefit of the one providing said software. I wish, and wish only I can, that this trend goes away at some point.
The app knowing I took a screenshot feels adjacent to me to a keylogger. Imagine how many apps are capturing that information silently. To my mind, a screenshot is something that is happening outside of the app context, the app knowing about it is a security flaw imo.
To my knowledge, this is a misunderstanding. The app does not know that you are taking a screenshot, rather iOS knows you are taking a screenshot (as it must) and is excluding an element on display that has been designated by the developer as sensitive information. This is the same technology that prevents you from accidentally screenshotting your password manager; the developer has simply performed a nifty trick to display a small icon behind where the “follow” button would otherwise be displayed.
There are plenty of instances where this sort of thing can be annoying, such as when you try to screenshot a streaming service app and DRM enforcement leaves you with a blank screenshot, but IMO this particular instance is actually very tasteful; seeing “follow” on every screenshotted post is just useless noise, but a small unobtrusive platform icon is a useful reminder that the post came from Bluesky and not another very visually similar service like X(cancel) or Mastodon.
Android does it too: https://developer.android.com/about/versions/14/features/scr...
Yes, and I would say it's a bad thing that the OS tries to prevent this.
> seeing “follow” on every screenshotted post is just useless noise, but a small unobtrusive platform icon is a useful reminder that the post came from Bluesky and not another very visually similar service like X(cancel) or Mastodon.
I would say it's a bad thing that Bluesky makes the screenshot look different from what was on screen for the user. If I cared about excluding the "useless noise" from a faithful depiction of the pixels on my screen, I could address that myself.
And that is reasonable, but it is also a surface where an app touches the OS, which should be a permission boundary that I can control. Allowing the option to opt-out of screenshot blocking with a proper double-confirm warning and biometric auth is also reasonable.
That is what this article is about and why you should read it before commenting. The whole point is that it doesn't need to know you're taking screenshots. That's why it's a clever trick.
Isn’t that what everyone is talking about?
Otherwise userDidTakeScreenshotNotification only fires for your own app
Found in the HN commenting guidelines, linked at the bottom of most pages
If someone from Google Maps or LinkedIn team is here, please, when I take a screenshot it's because I want to a screenshot, not share the friggin location/post.
Not sure who got the idea that it was useful, it isn't.
If I'm sending a screenshot it's because I want to send exactly what I see on my screen and not have my recipient's gmaps instance happily recompute a route it thinks is better or leave out the routing information I included, or switch from biking to driving directions, or whatever else.
Ah... to imagine a world where you could just share a coordinate string and people could open it in whatever map app/page they wanted. Geo URI is probably the closest we have today but I don't think much of anything outside the OS Geo community accepts it.
A lat/lon/zoom/start?/dest? is kind of what a Google Maps share currently is, but it's neither an interoperable standard nor a reliable capture of the current state, so really the worst of both worlds.
(Also, hi AB! Nice to see you on here)
It's not clear who it is protecting against, it does not seem to be effective at protecting against anything at all, it is actively annoying to the user, and has no way to disable. Perfect example of the usual "security theater" feature.
Unsecure: open Shortcuts, tap Gallery, search “Adjust Clipboard”. Add to Action Button folder and run from Action Button. - Or add “Dismiss Siri and Continue” action after “Get Clipboard” so you can say “Siri, Adjust Clipboard”.
Type in the still-unreasonably small window, tap Done, paste password. (Then clear clipboard I suppose and consider privacy implication if your clipboard syncs to Mac.)
Could write my own phone operating system to not be subject to the iOS WiFi password field display settings though!
*and writing a custom wifi kernel module.
Oh wait it absolutely does.
Just like their iCloud Keychain API that lets apps secretly track users across app reinstalls and device resets.
And I prefer to see and choose the data an app stores on my fucking ICLOUD ACCOUNT. And fucking DELETE it when I want.
There's no way to do that from an iOS device.
Hijacking the screenshot process is a privilege that you ought to be able to revoke, it's insane to allow software to be given more control.
And don't tell me it's anything to do with security when it can be circumvented in any number of ways.
Screenshots allows you to get a point in time reference to what you are sharing.
In 2026, we now know that the information can be edited, or completely removed for many reasons, some legitimate, and some nefarious.
Taking a screenshot is the easiest way to ensure the original is kept for folks to see. Frankly, it'd be even better if (a) the app can signal to the OS information about the url to the page for the screenshot, (b) timestamps were captured in the image and not cropped, and (c) the OS can authenticate the screen shot and digitally sign that it came from an unaltered device.
The toast shows up after the screenshot, but my phones's long screenshot feature captures the top part a second time, so the top part of the chat becomes unreadable.
Of course this is doable on open source OSes like GrapheneOS, it just sucks that you have to keep modifying the OS every time they release a new version
You don't have to wish, in this scenario. Bluesky supports third-party clients, you can use one that has a more minimal featureset if you prefer.
Android and iOS should not let apps do this, because it can be (ab)used by apps that you can’t really choose not to use.
I know there’s a popular bank in my country that completely blocks screenshots and screen recordings on Android somehow.
I actually really like this approach. The action button isn't relevant in this context, and it doesn't occlude the content.
There's certainly situations where you wouldn't want this (ie if you're developing the app and you want to redesign starting from a screenshot), but for the average user I think this isn't overly hostile. I understand that people are dogmatically opposed to intent being modified, but I think you need to balance nuance. I actually enjoy having an attributable source in shared elements, and I think this is a low-impact way of achieving that.
It is user hostile.
You're just defending Bluesky because you're on the same team politically. If the subject of this headline was X (an app that does the same thing, which I also don't agree with) everyone here would be seething with rage.
That was the expectation of using the product so it fits and isn’t anything like this discussion.
Yellow.
They fuckin did it. Not construction not a warning of some type. Not yellow pages. Yellow - cool looking yellow.
Is what I said to myself as a 20-something product designer
(a) the freedom to screenshot any content on your own device (b) the freedom to share content with others that cannot be screenshotted
It can be annoying when DRM or privacy features block a screenshot, but I think it can also benefit the platform ecosystem that you participate in as a user too. Idk!
Sent from my Ryobi Riding Lawnmower
I agree this can be defined as cool and very very likely someone did this on their free time/prompted Claude on the side.
It's bad UX all around:
- iOS claims it mirrors my screen (It does not)
- Except when it does mirror my screen (Depending on the app!)
To be clear, I do think it's nice to beam the video directly to the target device for better quality, but that's not what screen mirroring is!
Does this indicate that the privacy feature has a gap, where you could reveal the length of your password if you take a screenshot mid app switch?
Their product UI kind of looks like X, so it's helpful to know the source of a post
We use “Zero Knowledge Pixels” so no images can be leaked onto the dark web where all the criminals live.
The way it works is, as long as our content is so moderated to hell, most dark web hosts avoid crawling us entirely. It’s just not that interesting of content. Which means it’s safe content. Safety first, I always say.
So we listened to the feedback from our dozens of users and put all watermark images on the blockchain so it’s instantly federated and backed up in a vault in Antarctica. We call it the “Waterhose”. When an image reaches the vault, it becomes “frozen” and only an admin can “thaw” the data.
It’s all backed up with proofs. By people way smarter than you lol
Use our app
https://github.com/mozzius/expo-privacy-sensitive/blob/main/...