Comparison

Pululu vs Gravity

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

Head to head
About

Pululu

Connect with native speakers your age for stress-free language exchange. Real-time translation and voice chat facilitate learning natural phrases and quick responses through genuine conversations.

Highlights
  • Real-time translation for calls
  • Connect with native speakers
  • Voice chat and calls
  • Speaking-first learning cycle
  • Safe and supportive community
  • Learn natural phrasing
Features
Read full description

Speak, and make it yours. Your first step becomes the easiest. Pululu is a language exchange app where you can connect with native speakers of your generation through calls and voice chat—backed by real-time translation. Worried you’ll freeze when you “can’t catch it” or “can’t say it”? It’s okay. With translation, the conversation doesn’t stop. Learn “real, living language” you can’t get from textbooks—through real conversations. 【Pululu Features】 ① Real-time translation for stress-free calls Even if you get stuck, it’s OK. That sense of safety lowers the hurdle and helps you start talking. ② Match with native speakers your age and practice via calls & voice chat In real conversations (English, Korean, and more), you naturally build “natural phrasing” and “quick responses.” ③ A speaking-first learning cycle Practice → Review → One more phrase you can say. The more you talk, the closer you get to the “you who can speak.” ④ A safe and supportive community 24/7 monitoring and support, so you can enjoy language exchange with peace of mind. 【Recommended for】 ・You want to try language exchange but feel too nervous to take the first step ・You love K-pop or K-dramas and want to speak Korean ・You want to learn natural expressions from native speakers in real conversations ・You want to casually voice chat with people from other countries Start with a stress-free call—with translation—on Pululu. Experience language learning that starts with your voice.

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/

Screenshots

Pululu3 screens
Gravity4 screens

Verdict

The call

The clearest difference is rating: Pululu at 4.7 against Gravity's 4.1. Gravity's advantage is ads (none vs shown) and review sentiment (69% vs 54%). On price, update cadence, in-app purchases and monetization model 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. Pululu sells 6 in-app purchases, starting at $6.99 per month and Gravity sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Pululu holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Gravity has 39 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 54% of Pululu's written reviews are positive against 69% of Gravity's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Pululu ships an update weekly, Gravity every 9 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
Pululu versus Gravity: the parameters behind the verdict, then further details
ParameterPululuGravity
PriceFreeFree
Rating4.7 (7 ratings) — better4.1 (39 ratings)
Positive reviews53.8% of reviews69.0% of reviews — better
Number of ratings739 — better
Update frequencyWeekly — betterEvery 9 days
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size179 MB109 MB
Age rating4+4+
DeveloperPululu inc.Heimdall Space Inc.

Customer experience

Pululu

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive53.8%
Neutral0.0%
Negative46.2%

Gravity

All ratings35 ratings
Positive77.1%
Neutral0.0%
Negative22.9%
Written reviews29 reviews
Positive69.0%
Neutral3.4%
Negative27.6%

In-app purchases

6 purchases

Pululu

Subscriptions6
  • PLUS7 Days trial$6.991 Month
  • PRO 1week$6.997 Days
  • PRO3 Days trial$14.991 Month
Show 3 more
  • PRO$14.991 Month
  • PRO 3month$29.993 Months
  • PRO 6month$49.996 Months
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

Questions

Is Pululu free?
Pululu is free to download, with in-app purchases available.
Is Gravity free?
Gravity is free to download, with in-app purchases available.
Which has better reviews, Pululu or Gravity?
Pululu is rated higher. Pululu averages 4.7 out of 5 from 7 ratings, while Gravity averages 4.1 from 39 ratings.
Do Pululu or Gravity have ads?
Pululu shows ads; Gravity does not.
Which is updated more often, Pululu or Gravity?
Pululu ships an update weekly, and Gravity every 9 days. Most recently, Pululu was updated on October 30, 2026 and Gravity on October 31, 2026.

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