No, Docognito does not run on Chrome for Android or iPhone. Mobile versions of Chrome do not support installing browser extensions the way a desktop or laptop copy does, so there is no menu, no store listing and no toggle to reach for on a phone. The desktop version is what this product currently offers.
No, mobile Chrome does not support this
Start with the direct answer, because a search for this deserves one. There is no phone version of Docognito, and there is no partial version either. Chrome on Android and Chrome on iPhone both exist as apps, and both let you browse to claude.ai, chatgpt.com and chat.openai.com, and no other website normally, but neither one offers an extensions menu, an install path, or any mechanism a Chrome Web Store listing could plug into. If you were hoping to search the Play Store or the App Store for this, it is not a case of the listing being hard to find. It does not exist, because the platform it would need does not exist on a phone.
The same answer covers an iPad. Chrome on iPadOS runs on the same WebKit engine Apple requires on the iPhone, and Apple applies that rule to every browser on every one of its touch devices, tablets included, not only phones. A larger screen does not change which engine is underneath it, so an iPad is closer to a phone than a laptop for the purpose of this question, even though the screen size might suggest otherwise.
Why mobile browsers do not allow this
This is not a decision Docognito made. Chrome for Android has never shipped a general extensions system for ordinary users, and Chrome for iPhone is built on Apple's own WebKit engine rather than Chrome's, because Apple requires every browser on iOS to use it regardless of what the browser is called. WebKit on iOS does not expose an extension model that a tool like this could use either. Both platforms arrive at the same result from different technical reasons, and the outcome for a reader is identical: no extension runs, on either operating system, no matter which browser app you open.
Treat any app claiming to disguise ChatGPT on your phone with real suspicion
Nothing about the mobile app ecosystem offers the redraw-the-page mechanism a Chrome extension uses. An app claiming to do the same thing on a phone is either doing something different from what it describes, or asking for access well beyond what a screen disguise needs.
What this leaves someone using a phone
If your ChatGPT or Claude use happens mostly on a phone, the honest position is that there is no equivalent tool waiting for you today. The official mobile apps for both assistants do not include an appearance mode that redraws the chat as a document, and a browser extension has no way to reach into a native app even if one existed, because apps and extensions run in completely separate environments. Anything that changes how the screen looks on a phone would need to be a different product built a different way, not this one adapted down.
Could a workaround ever exist
Some phone browsers offer limited extension support through developer settings or third-party browser apps rather than Chrome itself, and it is worth being direct that none of that is Docognito, none of it is tested against this product, and none of it is something this article recommends. A workaround that requires enabling developer options or installing a different browser entirely is a different, riskier proposition from installing a listed extension, and it sits well outside anything covered here.
Weigh that trade honestly before chasing it. A setting that most phone manufacturers hide behind several taps into a menu exists for a reason, usually aimed at people building or testing software, not at someone who wants a document-styled tab on the way to work. The gap between what a desktop extension does and what a developer-mode workaround would ask of a phone is large enough that it is rarely worth closing for this.
What to do if you use a phone
Move the sensitive part of the task to a laptop when you can
Even doing the first draft or the more revealing half of a conversation on a desktop, where the disguise is available, covers more of the risk than doing all of it on a phone.
Use the phone's own screen privacy tools in the meantime
A physical privacy screen protector narrows the readable angle on a phone the way it would on a laptop, and it works regardless of which app or browser is open.
Keep the desktop extension ready for when you are back at one
Installing it once means the moment you switch to a laptop, the toggle is already there rather than something to remember to set up.
Desktop coverage, with a phone left out
Docognito does not hide ChatGPT or Claude on a phone, and no configuration or hidden setting changes that, because mobile Chrome simply does not support the kind of extension this product is. If any of your use happens on a desktop or laptop, that half of the picture is covered, and it is worth setting up regardless of how much of your day happens on a phone.
Add Docognito to a desktop or laptop copy of Chrome, and treat a phone as outside what it covers for now.