The best grammar checker apps for Android

The best grammar checker app for Android depends on what you need. For free, built-in fixes, start with the keyboard you have: Gboard's Proofread on supported phones, or Writing Assist on a supported Samsung Galaxy. For a full writing assistant across devices, Grammarly. For paraphrasing, QuillBot. If English is your second language and you want to understand and stop repeating your mistakes, Lingently.

This page is written by the Lingently team, so we're one of the options. We didn't run our own tests. It's based on each app's published features, checked on 18 October 2026 on the official websites and Google Play listings. Features vary by phone, region and language.

At a glance

Gboard

Best for: everyone, as the starting point. Google's free keyboard is on most Android phones. It autocorrects spelling and suggests words as you type, in hundreds of languages. On supported phones, its writing tools add Proofread (a whole-message grammar and spelling check) and tone options such as Professional, Friendly and Shorten. Google lists the Pixel 9 and 10 series and some recent Honor, Motorola, OnePlus, OPPO, POCO, realme, vivo and Xiaomi models. Proofread covers English, Spanish, French, German, Italian, Portuguese, Chinese, Japanese and Korean.

Keep in mind: Proofread isn't on most older or cheaper phones, and Google's help page doesn't say it explains its changes. More in Lingently vs Gboard.

Samsung Galaxy AI Writing Assist

Best for: owners of a supported Samsung Galaxy. Part of Galaxy AI. After you write, you tap the Writing Assist icon to check spelling and grammar, or to change the writing style. Some models can also write a message from keywords and translate chats. You turn it on under Settings, then Galaxy AI, and you need a Samsung account.

Keep in mind: It only exists on supported Galaxy devices, and Samsung says availability varies by model, software and region. Languages vary by region too. More in Lingently vs Samsung Writing Assist.

Grammarly

Best for: people who want one writing assistant on phone and laptop. On Android, Grammarly is no longer a keyboard. Its Play listing says it works with any keyboard, such as Gboard or SwiftKey, and that the old Grammarly Keyboard was discontinued. A floating button checks spelling, grammar, punctuation and tone as you type, with short explanations. The free plan covers spelling and grammar and 100 AI prompts a month. Pro, listed at $12 a month on grammarly.com, adds full rewrites and tone changes. It also runs in the browser, on desktop and on iPhone.

Keep in mind: The best features are paid, and Pro costs more than most apps here. More in Lingently vs Grammarly.

LanguageTool

Best for: writing in many languages, on a computer. LanguageTool checks over 30 languages, with browser add-ons, Word and Google Docs plugins, and apps for Windows, Mac and iPhone. The free plan checks up to 2,000 characters per text field.

Keep in mind: We found no official Android app, on its site or on Google Play. On an Android phone you can paste text into its web editor in the browser. More in Lingently vs LanguageTool.

QuillBot

Best for: paraphrasing, rewriting and translating. QuillBot's Android app offers an AI keyboard and a floating widget that works across apps. Its Play listing says the free version includes a grammar check, 2 paraphrase modes, a translator and an AI detector. Premium unlocks 10+ modes; in-app prices on Google Play range from $19.95 to $99.95.

Keep in mind: It's a broad toolbox. If you only want corrections with reasons, much of it is extra. More in Lingently vs QuillBot.

Microsoft SwiftKey

Best for: fast typing in several languages at once. A free keyboard that learns how you type, with autocorrect, a spell checker and predictions. You can enable up to five languages at once, from more than 700. Its Play listing also lists AI tools to rewrite your text in a different tone or compose a draft.

Keep in mind: It's a keyboard first. Its listing talks about spell checking and rewriting, not about grammar explanations.

Lingently

Best for: people who write in English as a second language and want to learn from their own mistakes. A small character floats over any app, like WhatsApp, Gmail or Slack. Tap it, and it checks the text field you're typing in, only when you tap. Each fix is struck through and corrected, with a one-line reason, and Replace puts the text back. Your fixes become short daily practice, a word bank and a view of the mistakes that keep coming back. It checks English, Spanish, French, German and Portuguese, and you keep your own keyboard.

Keep in mind: The free plan has 5 checks a day. Every new phone gets 14 days of Pro free, no card; then Pro is $47.99 a year or $6.99 a month. It doesn't check as you type, and it works on Android phones. More on the Android grammar checker page.

How to choose

1. Start with what you have. If your phone has Gboard Proofread or Samsung Writing Assist, try it for a week. It's free.
2. Decide if you want fixes or learning. If you just want clean text, a checker is enough. If you keep making the same mistakes, pick an app that explains and helps you practise.
3. Check where you write. If it's mostly a laptop, Grammarly or LanguageTool. If it's mostly your phone, look at the floating apps: Grammarly, QuillBot or Lingently.
4. Check your languages. Gboard, SwiftKey and LanguageTool cover the most.

Want only free options? See free Grammarly alternatives for Android.