Gravity vs Speak Japanese
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/
Speak Japanese
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Achieve real Japanese fluency - not just textbook knowledge. NowFluency for Japanese focuses on what matters most: understanding and speaking Japanese naturally. We combine structured native-speaker content, on-device AI speech analysis, and live human voice practice to create the most complete Japanese learning experience on iOS. * STRUCTURED CONTENT LIBRARY * Learn Japanese from authentic material organized by type: - Videos: real native Japanese speaker content - Dialogs: authentic two-speaker conversations - Short Talks: monologue listening practice - News: stay informed while learning Japanese - Short Stories: narrative reading and listening All content is searchable and filterable by level (A1-C2) and topic. * AI SHADOWING COACH (OFFLINE) * On-device Whisper AI - no internet needed for speech analysis. - Sentence-by-sentence shadowing: listen, record and get your score - Pronunciation score 0-100 with accuracy, fluency and completeness breakdown - Word-level feedback showing exactly which sounds to improve - Vocabulary pronunciation drill with instant AI scoring * TALK NOW - SPEAK WITH REAL PEOPLE * NowFluency's core feature: instant anonymous voice matching with Japanese learners worldwide. Real conversations, zero pressure - the fastest way to build fluency in Japanese. * AI CONVERSATION PARTNER * Practice speaking Japanese anytime, on any topic, at your own pace. Our AI adjusts difficulty to your level and gives real-time feedback on your responses. * VOCABULARY HUB (SPACED REPETITION) * Save Japanese words directly from lessons. Our SRS system schedules reviews at exactly the right time - so nothing is ever forgotten. Practice with 4 modes: - Flashcard self-assessment (Forgot / Hard / Good / Easy) - Multiple-choice game (15-second timer, 3 lives) - Typing challenge (smart typo-tolerant scoring) - Pronunciation drill (record, AI scores your Japanese accent) * COMPLETE LESSON TOOLKIT * Every piece of content unlocks: - Full transcript with tap-to-translate on any word - Shadowing practice: repeat sentences, get pronunciation scores - Role Play: speak as a character in the dialog - Dictation: listen and type what you hear - Comprehension Quiz: multiple choice reading comprehension - True/False Quiz: instant understanding check - Grammar and Knowledge: explanations in context * GAMIFICATION * - Daily XP goals and streak protection - Global leaderboard rankings - Multiplayer games: Vocabulary Duel, Sentence Scramble, Shadowing Duel - Achievements and study history tracking * COMMUNITY * - Ask questions, post updates, get native Japanese speaker feedback - Comment and react on community posts - Bookmark lessons and save discussions for later * YOUTUBE IMPORT * Turn any Japanese YouTube video into a structured lesson instantly. Get the full transcript, then practice with shadowing, dictation, quizzes, and vocabulary extraction. NOWFLUENCY PREMIUM: - Completely ad-free - Unlimited AI conversation sessions - Unlimited word lookups and translations - Unlimited saves and YouTube video imports Dark and Light mode included. AI speech model runs offline for fast, private analysis. Download NowFluency and start speaking Japanese today. Terms of Use (EULA): https://lingfast-server.tnpixel.com/legal/nowfluency/terms-of-service
Screenshots
Verdict
The clearest difference is ads: Gravity at none against Speak Japanese's shown. On price, in-app purchases, device support 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
Both are free to download. Gravity sells 6 in-app purchases, starting at $4.99 per month and Speak Japanese sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | Gravity | Speak Japanese |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (45 ratings) — better | — |
| Positive reviews | 69.0% of reviews | — |
| Number of ratings | 45 — better | — |
| Update frequency | Weekly | — |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 110 MB | 77 MB |
| Age rating | 4+ | 4+ |
| Developer | Heimdall Space Inc. | Dinh Thang Tran |
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
Speak Japanese
- NowFluency Premium Weekly$3.997 Days
- NowFluency Premium Monthly$8.991 Month
- NowFluency Premium Yearly$49.991 Year









