Comparison

Gravity vs Nihongo Rush

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

Nihongo Rush

Learn Japanese vocabulary and grammar through an engaging arcade-style game. Progress through various districts, master words with spaced repetition, and improve listening skills with spoken audio. Daily challenges and achievements encourage consistent practice.

Highlights
  • Arcade-style learning gameplay
  • Spaced repetition for vocabulary retention
  • Listening comprehension exercises
  • JLPT N5 and N4 level content
  • Daily quests and achievements
  • Spoken Japanese words and sentences
Features
Read full description

Learn Japanese like it's the best arcade game in town. Nihongo Rush turns vocabulary into short runs on the train line from Tokyo to Fukuoka: answer fast, keep the combo alive, catch the EXPRESS, and come back speaking. Hachi, the shiba station master, rides with you. HOW A RUN WORKS Every run is six legs of quick questions with a bonus station between them. Right answers build your combo and multiply your score; wrong ones cost a heart. Catch the EXPRESS at combo 20, grab a golden ticket for x5, choose your train at the fork (LOCAL, RAPID or MYSTERY), and finish with a bonus spin. BONUS STATIONS • MATCH — pair Japanese with English against the clock • LISTEN — no romaji, just your ears • CROSSING — tap the right sign as the words roll by • IZAKAYA — customers order in Japanese, you serve the right dish REAL JAPANESE, SPOKEN ALOUD • Six cities, 48 districts, 325 packs — each one a pattern plus five words • About 1,600 words and 1,500+ example sentences covering JLPT N5 and N4 • Every word and sentence is voiced; LISTEN stations train your ear • Build sentences tile by tile from the words you already know • Romaji on or off; hiragana and katakana packs for beginners LEARNING THAT STICKS Words you got right come back a little later, and later again, until they are learned. Words you struggle with come back sooner. Your Cards collection shows what you have met and what you have mastered, district by district. DAILY RHYTHM Daily quests, achievements and a streak. One run a day adds up; a reminder from Hachi at the time you pick, if you want one. NIHONGO RUSH PRO The whole app is one subscription: monthly, or yearly with a 7-day free trial. No ads, no locked packs, no energy meter. Prices are shown in the app. Payment is charged to your Apple Account at confirmation of purchase, or after the free trial. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel it in your Apple Account settings at any time. Terms: https://nihongorush.com/terms Privacy: https://nihongorush.com/privacy Support: support@nihongorush.com

Screenshots

Gravity4 screens
Nihongo Rush4 screens

Verdict

The call

The clearest difference is rating: Gravity at 4.1 against Nihongo Rush's 3.4. Gravity also leads on ads (none vs shown) and review sentiment (68% vs 50%). Nihongo Rush's advantage is update cadence (every 4 days vs every 9 days). On price, in-app purchases, monetization model and iOS requirement 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 Nihongo Rush sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Gravity holds the better App Store score, 4.1 against 3.4. That said, the two scores are not equally well evidenced: Gravity has 35 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 68% of Gravity's written reviews are positive against 50% of Nihongo Rush's.

UpkeepUpdate frequency

Gravity ships an update every 9 days, Nihongo Rush every 4 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Gravity versus Nihongo Rush: the parameters behind the verdict, then further details
ParameterGravityNihongo Rush
PriceFreeFree
Rating4.1 (35 ratings) — better3.4 (5 ratings)
Positive reviews67.9% of reviews — better50.0% of reviews
Number of ratings35 — better5
Update frequencyEvery 9 daysEvery 4 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size109 MB255 MB
Age rating4+4+
DeveloperHeimdall Space Inc.Egemen Denizeri

Customer experience

Gravity

All ratings35 ratings
Positive77.1%
Neutral0.0%
Negative22.9%
Written reviews28 reviews
Positive67.9%
Neutral3.6%
Negative28.6%

Nihongo Rush

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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
2 purchases

Nihongo Rush

Subscriptions2
  • Monthly$9.991 Month
  • Yearly7 Days trial$49.991 Year

Questions

Is Gravity free?
Gravity is free to download, with in-app purchases available.
Is Nihongo Rush free?
Nihongo Rush is free to download, with in-app purchases available.
Which has better reviews, Gravity or Nihongo Rush?
Gravity is rated higher. Gravity averages 4.1 out of 5 from 35 ratings, while Nihongo Rush averages 3.4 from 5 ratings.
Do Gravity or Nihongo Rush have ads?
Nihongo Rush shows ads; Gravity does not.
Which is updated more often, Gravity or Nihongo Rush?
Gravity ships an update every 9 days, and Nihongo Rush every 4 days. Most recently, Gravity was updated on October 25, 2026 and Nihongo Rush on October 24, 2026.

Other comparisons