Life & fun · alternatives · 2026
24 alternatives to Oyomi
Machine learning based Japanese reader & grammar analyzer
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Oyomi launched in 2023; newer entries below may have overtaken it.
- 1
Codex by OpenAI▲954OpenAI's smartest and most intuitive to use model yet
2021 · openai.com · its alternatives →
- 2IM
The idea is actually quite simple. As a Japanese learner and a coder, I've always wanted there to be an open-source, 100% free for learning Japanese, similar to Monkeytype in the typing community. Unfortunately, pretty much all language learning apps are closed-sourced and paid these days, and the ones that are free have unfortunately been abandoned. But of course, just creating yet another language learning app was not enough - there has to be a unique selling point. And then I thought to myself: why not make it crazy and do what no other language learning app ever did by adding a gazillion…
2025 · kanadojo.com · its alternatives →
- 3
- 4
Grammify▲54Open source Grammarly alternative, using your own OpenAI API
2023 · docs.google.com · its alternatives →
- 5
Mojiyomi▲2Privacy-first AI-OCR: Extract text from images, PDFs & HEIC
Jul 2026 · mojiyomi.jp · its alternatives →
- 6
- 7OS
Complete AI Platform: RAG Systems & Intelligent Agents for Local AI
2025 · rlama.dev · its alternatives →
- 8
Grammar check and rewriting in 6 languages
2023 · figma.com · its alternatives →
- 9
- 10
Fujiyama▲192Practice natural Japanese conversation in real-time with AI
2024 · apps.apple.com · its alternatives →
- 11
GrammarBot▲183Write flawless English with AI, no subscriptions, offline
2024 · grammarbot.app · its alternatives →
- 12
- 13
GrammarGuru▲74Finish work faster with our AI-powered writing companion
2023 · grammarguru.app · its alternatives →
- 14
Hi HN, Just wanted to share a tool i've been working on to help with my own study routine. It’s a browser extension called Lingoku. The idea is simple: we spend hours browsing the web in English every day. This tool replaces some of the english words with Japanese vocabulary based on your japanese level (Similar to Toucan, but with a better user experience). It’s basically an attempt to make the "i+1" method actually passive, you understand the sentence because it's mostly english, but you pick up Japanese words naturally from the context. It uses an LLM in the backend to make sure the…
Dec 2025 · lingoku.ai · its alternatives →
- 15
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Hey HN, it’s been 8 years since I posted on here about the launch of my Japanese dictionary app Nihongo [0] and I’m finally back with a new app: Nihongo Lessons! Think of Nihongo Lessons as the textbook to Nihongo’s dictionary. It’s an app for learning Japanese, specifically made for learners who are serious about becoming fluent, and want a guided set of content that will help them efficiently acquire vocabulary and grammar. The project came about when Adam Shapiro of Japanese Level Up (Jalup) [1] announced last April that he was shutting Jalup down. As a fan of Adam’s work I was bummed to…
2022 · lessons.nihongo-app.com · its alternatives →
- 17
- 18
Japanese dictionary app for iPhone and iPad with kanji lookup, example sentences, flashcards, OCR photo lookup, and a Safari extension for reading Japanese.
2015 · nihongo-app.com · its alternatives →
- 19
- 20
Kazu Navi (かずナビ)▲142Learn Japanese with clarity, context, and confidence
2025 · kazunavi.com · its alternatives →
- 21
I quit my job last year and worked mostly on this full SwiftUI rewrite of my Japanese reading app, Manabi Reader. The rewrite gave me the opportunity to expand to macOS (and without Catalyst so it feels extra native) and redo the data layer to be offline-first via Realm with iCloud sync. The biggest differentiators compared with other language study apps are that it tracks every word/kanji you read so that you can see how much of a given webpage/article you're already familiar with and other features/analytics built on that foundation; it automatically builds a personal corpus…
2023 · reader.manabi.io · its alternatives →
- 22
AI proofreader for Spanish English French Chinese Japanese..
2020 · its alternatives →
- 23
AI based tool to correct your grammar & rephrase sentences
2023 · its alternatives →
- 24
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →