Comparison

Polyidiom vs Tavi

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

Head to head
About

Polyidiom

Master idioms and slang across multiple languages with engaging illustrations and smart learning algorithms. Track your progress, save favorites, and explore cultural backgrounds. Offline access makes learning convenient anytime, anywhere.

Highlights
  • Card-based learning with definitions and history
  • Detailed explanations of cultural backgrounds
  • Save favorite idioms for review
  • Track learning progress and statistics
  • Support for six languages
  • Cartoon illustrations for enhanced memory
  • Offline learning support
Features
Read full description

PolyIdiom - Multi-Language Idiom Learning PolyIdiom is a multi-language idiom learning app designed for language learners. Through beautiful cartoon illustrations and smart learning algorithms, idiom learning becomes vivid and interesting. Supporting Chinese, English, Spanish, French, Japanese, and Korean, you can easily master cultural essences regardless of your native language. Core Features Card-based Learning: Flip-style learning experience with definitions, origin stories, and practical examples Detailed Explanations: Deep understanding of cultural backgrounds and usage scenarios Smart Favorites: Save your favorite idioms for review anytime Learning Statistics: Track progress and view learning achievements and trends Product Highlights Six Language Support: Complete coverage of Chinese, English, Spanish, French, Japanese, Korean Cartoon Illustration Design: Beautiful illustrations for each idiom to enhance memory Smart Learning Algorithm: Personalized content recommendations based on learning habits Elegant Interface Design: Clean and beautiful UI focused on learning experience Offline Learning Support: Learn anytime, anywhere without internet connection Subscription Service Free Version: Learn 3 idioms daily, 3 favorites limit, 1 language switch Premium Membership: Unlimited learning, unlimited favorites, switch languages anytime, ad-free experience Subscription Details Yearly Subscription: $7.99/year, average $0.67 per month Monthly Subscription: $1.99/month, flexible subscription Service Information Subscription auto-renews unless cancelled at least 24 hours before the current period ends Manage or cancel subscription in iPhone Settings > Apple ID > Subscriptions The current free trial period will be forfeited upon subscription activation Subscription fee charged to iTunes account upon purchase confirmation Terms of Service: https://polyidiom.app/terms-of-service Privacy Policy: https://polyidiom.app/privacy-policy Download PolyIdiom now and start your multi-language idiom learning journey!

About

Tavi

Engage in real conversations with AI tutors to learn languages. This app offers personalized lessons based on your level, using various real-world content like news and photos. Track your progress and stay motivated with daily streaks and rewards.

Highlights
  • AI-powered conversation practice
  • Personalized lessons
  • Photo and news-based learning
  • Custom text lessons
  • Progress tracking dashboard
  • Daily study streaks
Features
Read full description

Learn any language through real conversations with AI — not flashcards, not multiple choice. Just you and a personal tutor that adapts to your level. Tavi connects directly to ChatGPT, Claude, or Gemini to create personalized lessons in real time. Instead of paying $14/month for a language app, you pay the AI provider directly — pennies per lesson. Heavy daily use is still under $1/month. HOW IT WORKS We'll walk you through connecting your ChatGPT, Claude, or Gemini account. It only takes a minute — and Google Gemini is completely free to start. Your credentials stay securely on your device and are never sent to Tavi. LEARN YOUR WAY - Daily Lessons with rotating themes tailored to your level - Photo Lessons — snap a menu, sign, or document for instant vocabulary - News Lessons — practice with today's headlines - Custom Lessons — paste any text and learn from it - Placement Test — take a quick AI conversation to find your level 10 LANGUAGES Spanish, French, German, Japanese, Korean, Mandarin Chinese, Portuguese, Italian, Arabic, and Hindi. Beginner to Advanced (CEFR A1-C1). STAY MOTIVATED - Daily study streaks with milestone celebrations - XP rewards for lessons and consistency - Progress dashboard with weekly charts and statistics FREE TO START 1 free lesson every day. All languages and lesson types included. Upgrade to Pro for unlimited lessons, streak freeze, and the full analytics dashboard.

Screenshots

Polyidiom4 screens
Tavi4 screens

Verdict

The call

The clearest difference is update cadence: Polyidiom at every 3 days against Tavi's weekly. Tavi's advantage is ratings volume (6 vs 1). On price, rating, review sentiment and ads 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. Polyidiom sells 3 in-app purchases, starting at $1.99 per month and Tavi sells 2 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

On the App Store both sit at effectively the same score — 5.0 for Polyidiom against 5.0 for Tavi. That said, the two scores are not equally well evidenced: Tavi has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Polyidiom ships an update every 3 days, Tavi weekly. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 8 level
Polyidiom versus Tavi: the parameters behind the verdict, then further details
ParameterPolyidiomTavi
PriceFreeFree
Rating5.0 (1 ratings)5.0 (6 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings16 — better
Update frequencyEvery 3 days — betterWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size43 MB13 MB
Age rating4+17+
Developer亲强 吴DYLAN,HALE MAKI DROP

Customer experience

Polyidiom

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Tavi

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Polyidiom

Subscriptions2
  • PolyIdiom Premium (Monthly)$1.991 Month
  • PolyIdiom Premium (Yearly)$7.991 Year
One-time1
  • Polyidiom Lifetime Membership$9.99
2 purchases

Tavi

Subscriptions2
  • Tavi Pro Monthly$4.991 Month
  • Tavi Pro Annual$49.991 Year

Questions

Is Polyidiom free?
Polyidiom is free to download, with in-app purchases available.
Is Tavi free?
Tavi is free to download, with in-app purchases available.
Which has better reviews, Polyidiom or Tavi?
Polyidiom and Tavi are both rated 5.0 out of 5 on the App Store, from 1 and 6 ratings respectively.
Do Polyidiom or Tavi have ads?
Neither Polyidiom nor Tavi shows ads.
Which is updated more often, Polyidiom or Tavi?
Polyidiom ships an update every 3 days, and Tavi weekly. Most recently, Polyidiom was updated on October 8, 2026 and Tavi on October 10, 2026.

Other comparisons