Fix My Japanese: Grammar Check
Write like a native
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Fix My Japanese checks the Japanese you wrote and tells you what to change, and why.
Paste or type anything (a sentence, a Slack message, a whole email), tap Fix It, and you get the corrected text back with every change listed separately: what you wrote, what it should be, and a short note on the rule behind it. Each correction stands on its own, so you can take the ones you agree with and think about the rest.
What it catches
- Particles: は against が, に against で. The mistakes that are hardest to spot in your own writing.
- Conjugation and tense: て-form, conditionals, and transitive/intransitive pairs like 開ける and 開く.
- Politeness: choose Formal (〜ます) or Polite (〜いたします) and it holds the whole text to that register. The email that starts polite and slips halfway through gets flagged.
- Kanji and okurigana: IME conversion slips (帰る for 返る) and okurigana that wobbles (行う, 行なう).
- Phrasing that is grammatically correct but that nobody actually writes, rewritten to what a native would say.
Made for
- Proofreading a work email before you send it
- Checking homework before class
- JLPT writing practice
- Anyone who has stared at a sentence wondering whether it sounds rude
Your corrections sync between iPhone and iPad over iCloud, so History looks the same on both.
Three corrections a day are free. A subscription removes the limit.
The app interface and the explanations are in English. The corrections themselves are Japanese.
The AI is accurate but not infallible. Treat it as a well-read second reader, not an oracle.
- Privacy Policy: https://fixmyjapanese.com/privacy
- Terms of Use: https://fixmyjapanese.com/terms
Stability improvements and bug fixes.
The developer, David Mohl, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- David Mohl
- Size
- 22.9 MB
- Category
- Education
- Compatibility
Requires iOS 18.2 or later.
- iPhone
Requires iOS 18.2 or later. - iPad
Requires iPadOS 18.2 or later. - Mac
Requires macOS 15.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.2 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Fix My Japanese Unlock $2.99
- Fix My Japanese Pro Annual $29.99
- Copyright
- © 2026 Digital Vibes (David Mohl)