# 识日 vs PolyEcho

The clearest difference is iOS requirement: PolyEcho at 13.0 against 识日's 15.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 识日 sells 2 one-off in-app purchases and PolyEcho sells 4 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

识日 ships an update every 9 days, PolyEcho every 5 days. The most recent releases landed on October 16, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 识日 | PolyEcho |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (601 ratings)](https://appshunter.io/ios/app/id6738333132/reviews)** | — |
| Number of ratings | **601** | — |
| Positive reviews | 94.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 112 MB | 207 MB |
| Requires iOS | 15.5 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Hangzhou Jingque Network Technology Co., Ltd.](https://appshunter.io/developer/1662293858) | [楷博 尚](https://appshunter.io/developer/1801785390) |

## What reviewers say

### 识日

[App page](https://appshunter.io/ios/app/id6738333132)

This intelligent app aids Japanese learners with smart vocabulary memorization, handwriting practice, and a comprehensive dictionary. It offers systematic 50-sound learning, example sentences with pronunciation and grammar analysis, and engaging review modes to enhance language acquisition.

**Highlights:** Smart vocabulary memorization, Handwriting and listening practice, Comprehensive Japanese dictionary, Systematic 50-sound learning, Example sentences with grammar analysis, Engaging review modes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一年会员 | $9.99 | one-time |
| 终生会员 | $19.99 | one-time |

**What reviewers like**

- 👍 Clean, simple, and intuitive interface
- 📚 Comprehensive vocabulary content from N5 to N1
- 🎯 Multiple learning modes and study methods
- 🆓 Extensive free features without paywalls
- 🔊 High-quality native pronunciation audio

**What reviewers complain about**

- 🐢 Slow word-switching animations
- 🔌 Performance issues and lag on some devices
- 💰 Some premium features require payment
- 🎬 Excessive animations affecting efficiency
- 🌐 Limited international phone number support for registration

**Reported bugs**

- Notes fail to save despite confirmation message
- Word duplication in study sessions (appearing 2-3 times)
- Audio/pronunciation suddenly stops working
- App crashes or freezes after updates
- Word lookup function is slow

**Requested features**

- Team/group learning with friend notifications
- Leaderboard system (optional participation)
- Practice exercises and quiz functionality
- Faster or removable word-switching animations
- Local offline dictionary/word lookup


### PolyEcho

[App page](https://appshunter.io/ios/app/polyecho/id6743313316)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $12.99 | per month |
| Semi-Annual Subscription | $59.99 | per 6 months |
| Annual Subscription | $99.99 | per year |
| 5-Time Conversation Credit | $2.99 | one-time |


## Frequently asked questions

### Is 识日 free?

识日 is free to download, with in-app purchases available.

### Is PolyEcho free?

PolyEcho is free to download, with in-app purchases available.

### Do 识日 or PolyEcho have ads?

Neither 识日 nor PolyEcho shows ads.

### Which is updated more often, 识日 or PolyEcho?

识日 ships an update every 9 days, and PolyEcho every 5 days. Most recently, 识日 was updated on October 16, 2026 and PolyEcho on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*