Comparison

Gravity vs Japanese Keyboard Trainer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Personalized learning plans
  • Instant vocabulary extraction from photos
  • Smart review system
  • Context-based flashcards
  • Immersion-focused learning
  • Daily learning sessions
Features
Read full description

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/

About

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.

Highlights
  • 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)
Features
Read full description

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

Gravity4 screens
Japanese Keyboard Trainer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Gravity versus Japanese Keyboard Trainer: the parameters behind the verdict, then further details
ParameterGravityJapanese Keyboard Trainer
PriceFreeFree
Rating4.2 (45 ratings)5.0 (1 ratings) — better
Positive reviews69.0% of reviews—
Number of ratings45 — better1
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size110 MB150 MB
Age rating4+4+
DeveloperHeimdall Space Inc.deLily Apps, Inc.

Customer experience

Gravity

All ratings45 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews29 reviews
Positive69.0%
Neutral3.4%
Negative27.6%

Japanese Keyboard Trainer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

Gravity

Subscriptions6
  • special offer$4.991 Month
  • Fluency$6.997 Days
  • Immersive Monthly7 Days trial$8.991 Month
Show 3 more
  • Immersive Monthly7 Days trial$11.991 Month
  • Immersion7 Days trial$14.991 Month
  • Polyglot7 Days trial$69.991 Year
4 purchases

Japanese Keyboard Trainer

Subscriptions2
  • Keyboard Trainer Monthly$0.991 Month
  • Keyboard Trainer Yearly$4.991 Year
One-time2
  • Cyber Kana Gold Logo$0.99
  • Keyboard Trainer Lifetime$6.99

Questions

Is Gravity free?
Gravity is free to download, with in-app purchases available.
Is Japanese Keyboard Trainer free?
Japanese Keyboard Trainer is free to download, with in-app purchases available.
Which has better reviews, Gravity or Japanese Keyboard Trainer?
Japanese Keyboard Trainer is rated higher. Gravity averages 4.2 out of 5 from 45 ratings, while Japanese Keyboard Trainer averages 5.0 from 1 ratings.
Do Gravity or Japanese Keyboard Trainer have ads?
Neither Gravity nor Japanese Keyboard Trainer shows ads.
Which is updated more often, Gravity or Japanese Keyboard Trainer?
Gravity ships an update weekly, and Japanese Keyboard Trainer every 5 days. Most recently, Gravity was updated on November 5, 2026 and Japanese Keyboard Trainer on October 31, 2026.

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