Gravity vs Japanese Keyboard Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gravity
Learn Japanese by capturing real-world text from your surroundings. This app creates personalized flashcards and study plans based on the vocabulary you encounter daily, making learning practical and context-driven.
- Personalized learning plans
- Instant vocabulary extraction from photos
- Smart review system
- Context-based flashcards
- Immersion-focused learning
- Daily learning sessions
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LEARN LANGUAGES THE FAST WAY - THROUGH VIDEOS! (Now with Mandarin Chinese support!) ◆ Learn Japanese and Mandarin Chinese through the content you already love. ◆ Gravity is an immersion-first language app that turns real videos and music into personalized learning. Doomscroll short native clips, sing along in Karaoke Mode, or pick something from a hand-curated library of native videos, each one transcribed word by word and levelled for learners. ◆ Whether you're into anime, J-pop, C-dramas, music, or YouTube creators, Gravity helps you build real language skills through context instead of generic textbook lessons. WHY CHOOSE GRAVITY? → Doomscroll to fluency: Moments turns scrolling into learning with a feed of short clips from native content. → Curated video library: native videos across anime, music, entertainment, creators, and more, levelled from complete beginner to advanced. → Word-synced transcripts: follow along word by word as the audio plays, with an English translation for every line that you can show or hide. → Karaoke Mode: follow the lyrics of songs you love, understand every line, and pick up vocabulary through music. → Tap to learn: tap any word for its reading, meaning, and an AI explanation, then save it in one tap. → Context-based flashcards: every saved word keeps the moment it came from, so you can replay the original clip while you review. → Smart spaced repetition: reviews are scheduled so each word comes back right before you'd forget it. → Practice right after watching: review the words you just saved as soon as you finish a video. → Daily word goals and reminders: stay consistent without overwhelming study sessions. BUILT FOR EACH LANGUAGE Japanese → Furigana, romaji, or no reading aids. Your choice. → Pitch accent graphs and dictionary meanings on every card. → Anime, J-pop, podcasts, streams, and more, levelled from Pre-JLPT to N1. Mandarin Chinese → Pinyin with tone marks, or turn it off. → Simplified characters, with traditional forms shown alongside. → C-dramas, music, and more, levelled from Pre-HSK to HSK 6. WHAT YOU'LL LEARN ◆ Real vocabulary and phrases, the way native speakers actually use them. ◆ Listening and reading skills through authentic videos, songs, and clips. ◆ Words from the shows, music, and creators you already watch. ◆ Language you'll actually hear, not just textbook examples. WHO IT'S FOR → Anime, J-pop, C-drama, and music fans who want to learn from what they already love. → Learners who already spend hours watching videos and scrolling online. → Travelers, international students, and people living or working abroad. → Busy learners who want immersion to fit naturally into their day. → Anyone tired of repetitive textbook lessons and overwhelming flashcard decks. HOW IT WORKS 1. Choose Japanese or Mandarin Chinese and your level. 2. Watch a video, scroll Moments, or sing along with a song. 3. Tap unfamiliar words to see what they mean and save them. 4. Gravity turns your saved words into flashcards, each linked to its original moment. 5. Review a few minutes a day and watch your known words grow. LEARN THROUGH WHAT YOU LOVE Doomscroll in the language you're learning. Watch videos. Sing your favorite songs. Gravity turns the content you already want to watch into something you can actually learn from. GRAVITY IS IN EARLY ACCESS. Any bugs, issues, or feedback can be directed to support@learngravity.com. Privacy: https://learngravity.com/privacy Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Japanese Keyboard Trainer
Master Japanese hiragana and katakana with this fun and interactive app. Learn to type quickly on a flick keyboard with gamified challenges and progress tracking. Features a unique learning approach with a humorous, critical sensei.
- Learn hiragana and katakana side-by-side
- Practice typing on a flick keyboard
- Gamified challenges with leaderboards
- Flashcards with pronunciation and romaji
- Progress tracking and game stats
- Customizable settings (themes, haptics)
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Ever notice that kana apps always split things in two? Hiragana now. Katakana… someday. (And then you never really learn a few of the katakana.) And why are we learning the stroke order as beginners? Are we going to paint someone a letter? No! We need to know how to type on that cool 12-key Japanese フリック入力 flick keyboard! Cyber Kana makes it fun and easy to learn the kana (hiragana and katakana side by side) and get really fast on the Japanese keyboard. Try it now! Be warned: A snarky Japanese-speaking sensei insults you mercilessly while you learn. がんばって! GAME MODE • Jam out to techno music while you race the clock. • Stuck on a kana? Tap "?" and the keyboard itself shows you exactly which keys to press and which way to flick. • Claim your spot on the Worldwide Leaderboard, ranked by Highest Scores and Longest Streaks! STUDY MODE • Flashcards with hiragana and katakana side by side. • Tap the card to reveal the romaji and hear the pronunciation. • Star the sounds you've learned, filter by type, and shuffle the deck. AND MORE • Game stats to track your progress over time. • Lots of customizable settings: Light Mode / Dark Mode, Fonts, Sensei Mood, Haptic Feedback, and more. • Optional: Sign in to save progress and sync across devices. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Japanese Keyboard Trainer at 5.0 against Gravity's 4.2. Gravity's advantage is ratings volume (45 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Gravity sells 6 in-app purchases, starting at $4.99 per month and Japanese Keyboard Trainer sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
Japanese Keyboard Trainer holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Gravity has 45 ratings behind it against 1, so its average is the more settled of the two.
Gravity ships an update weekly, Japanese Keyboard Trainer every 5 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Gravity | Japanese Keyboard Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (45 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 69.0% of reviews | — |
| Number of ratings | 45 — better | 1 |
| Update frequency | Weekly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 110 MB | 150 MB |
| Age rating | 4+ | 4+ |
| Developer | Heimdall Space Inc. | deLily Apps, Inc. |
Customer experience
Gravity
Japanese Keyboard Trainer
In-app purchases
Gravity
- special offer$4.991 Month
- Fluency$6.997 Days
- Immersive Monthly7 Days trial$8.991 Month
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- Immersive Monthly7 Days trial$11.991 Month
- Immersion7 Days trial$14.991 Month
- Polyglot7 Days trial$69.991 Year
Japanese Keyboard Trainer
- Keyboard Trainer Monthly$0.991 Month
- Keyboard Trainer Yearly$4.991 Year
- Cyber Kana Gold Logo$0.99
- Keyboard Trainer Lifetime$6.99









