Polyidiom vs Flagsay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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!
Flagsay
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Flagsay is an AI-powered language learning app built around real-world object scanning, spirit companion chat, and story-based practice. Core features: 1. Object Scan Learning: Use camera or photo library to identify objects and get vocabulary, pronunciation, examples, and translations. 2. Spirit Companion Chat: Turn scanned objects into AI companions and practice conversations with different personas. 3. Story Generation Practice: Generate learning stories from your daily vocabulary or custom words for reading and speaking practice. 4. Vocabulary and Progress: Save words, sync core learning data, and track your daily usage and learning progress. For any questions or suggestions, please contact us at support@flagsay.com Privacy Policy: https://flagsay.app/privacy Terms of Use: https://flagsay.app/terms
Screenshots
Verdict
The clearest difference is update cadence: Polyidiom at every 3 days against Flagsay's every 3 months. On price, ads, in-app purchases and device support 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. Polyidiom sells 3 in-app purchases, starting at $1.99 per month and Flagsay sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Polyidiom ships an update every 3 days, Flagsay every 3 months. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.
| Parameter | Polyidiom | Flagsay |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 days — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 43 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | 亲强 吴 | Shanghai Sunrise Chime Technology Co., Ltd. |
In-app purchases
Polyidiom
- PolyIdiom Premium (Monthly)$1.991 Month
- PolyIdiom Premium (Yearly)$7.991 Year
- Polyidiom Lifetime Membership$9.99
Flagsay
- CaiQi Talk Pro Monthly Subscription$2.991 Month
- CaiQi Talk Pro Yearly Subscription$29.991 Year









