Quillbot: AI Writing Assistant

Review by eFreeware

QuillBot is a writing assistant for Android from the developer QuillBot, and it has been on the Play Store since October 2023. It gathers paraphrasing, grammar checking, translation, an AI detector and a chat assistant into one app, with a smart keyboard and a floating widget that let you reach those tools while you type in other apps. The download is free, it carries no ads, and there are in-app purchases for the paid tier. With more than five million installs and a 4.5 average from over twenty-two thousand ratings, it has clearly found an audience.

What makes it worth a closer look is the shape of the thing. Rather than a single-purpose tool you open when something needs fixing, it is built to sit inside your writing routine: the keyboard and widget both put paraphrasing, grammar and translation a tap away from whatever app you happen to be in. If you write a lot on a phone, that placement matters more than any individual feature.

I would treat it as a general-purpose writing companion rather than a niche utility. The mix of editing tools, a translator and a detector suggests it is meant for people who move between drafting, polishing and checking in the same session, and who may not always be working in English. The trade-off is that a tool this broad asks you to learn where each piece lives before it feels quick.

The floating widget and keyboard are the real centerpiece

The feature the developer leads with is the floating widget, and I can see why. Edits, translations and rewrites can be made inside other apps, with no need to switch keyboards. That is a meaningfully different approach from opening a separate editor: the assistance comes to the text you are already writing, in the place you are already writing it.

The AI keyboard is the companion piece. Grammar checks, paraphrasing and translation sit inside the keyboard, so writing can be improved as you go. Between the two, the app is trying to cover both deliberate editing sessions and the in-the-moment fixes that come up while replying to a message or finishing a draft.

An accessibility permission lets the app read and assist with text typed elsewhere. It is the kind of thing worth reading about before you grant it. The payoff, if you are comfortable with it, is that you do not have to leave the app you are working in to get help with a sentence.

Paraphrasing, grammar and translation under one roof

The paraphraser reworks text for clearer meaning, tone and flow. Two modes are available at no cost, and eight more sit behind the paid tier for people who want finer control over how a rewrite turns out. There is also a Humanizer mode inside the AI keyboard, which the developer pitches as a way to make AI-written text read more naturally.

The grammar checker handles spelling and punctuation as well as grammar, and the suggestions are described as context-aware. It runs through the same keyboard.

Translation covers more than forty languages, including Spanish, French, German and English, and it can work on sentences, paragraphs or whole documents. The translation tools cover a wide scope and accept flexible input sizes.

The AI detector is the piece that stands apart from the usual editing lineup. Feedback is given sentence by sentence as well as for the whole document, rather than as one overall score. For anyone submitting work that might be scrutinized for AI involvement, that combination of local and document-wide analysis is the reason to pay attention to this app specifically.

Drafting tools, chat and image generation

Beyond editing, the app includes generative writing that can produce ideas, individual sentences or full drafts. The aim is stated plainly: getting past a blank page and communicating faster. Whether you want a tool to hand you a first draft is a matter of taste, but having it in the same place as the grammar checker and paraphraser means you can generate something and then clean it up without moving between apps.

There is also an AI chat for writing questions, which gives answers in real time. Think of it as a reference desk for the moments when you are unsure about wording or structure and would rather ask than guess. Image generation is included too, for creating pictures to accompany what you write.

Documents can be created, edited and saved locally inside the app, and you can pick up where you left off later. That local save is a quiet but useful piece of the package: it turns the app into somewhere you can keep working, not just a set of tools you pass through. For longer pieces, drafting in the app and then using the keyboard elsewhere covers both halves of the job.

What the free tier covers and what Premium adds

Getting started means downloading the app and creating an account. The app itself is free to download and shows no ads, but it does offer in-app purchases. The developer's summary of the free tier is a grammar check, two paraphrase modes, the translator and the AI detector at no cost, which is a generous starting set for occasional use.

Paying removes the writing limit and adds more advanced modes, quicker processing and a smarter assistant. One subscription is said to work across devices, including Android and web, so the same plan covers phone and browser. Anyone who writes daily, or who wants the extra paraphrase modes and the quicker turnaround, is the natural candidate for paying.

I would suggest starting free and watching which limits you actually bump into. If the two paraphrase modes cover your needs and the grammar checker does most of the work, there may be little reason to upgrade. If you find yourself wanting the additional modes or the faster processing regularly, the cross-device subscription is the more sensible way to buy in.

How I would fit it into a writing routine

The most natural setup is to let the keyboard and widget do the everyday work. Short replies, quick corrections and one-off translations are exactly the cases where leaving your current app to open a separate editor feels like too much effort. Having the tools inline is what makes them get used.

For longer pieces, I would draft inside the app and use the local document save to keep things together. That gives you a stable place to write, with the paraphraser and grammar checker close at hand, and it avoids juggling text between apps. When the draft is done, the detector is there if you need to check how the text might be read.

The translator is worth keeping in mind beyond formal writing. If you correspond with people in another language, or read material in one, having more than forty languages available from the same keyboard removes a step. A recent update brought a significant boost to performance and stability.

One caution I would repeat: this is a tool that asks for access to what you type. That permission is necessary for processing text in other apps. Decide whether that trade is acceptable to you before you build the app into your daily habits.

A capable all-rounder for people who write on their phone

QuillBot is at its best for anyone who does a meaningful share of their writing on Android and wants editing help without leaving the app they are in. Students working on assignments, professionals answering messages and documents, and people who write in more than one language all have something to gain from the combination of keyboard, widget, paraphraser, grammar checker and translator.

The detector is the feature that gives the app a clearer identity than a plain grammar tool, and the free tier is broad enough to judge the app on its own merits before spending anything. The honest caveats are the most advanced paraphrase modes and the faster processing sitting behind a subscription.

If you want a single writing assistant that covers drafting, correcting, translating and checking, this one is built for that job, and the install numbers and rating suggest plenty of people have settled on it. Try the free tools first, see how the keyboard fits your habits, and let your own usage tell you whether Premium is worth it.

What's new in version 4.17.0

Significant boost to performance and stability!