# 诗歌中国 vs 睡前数学

The clearest difference is in-app purchases: 睡前数学 at none against 诗歌中国's 15. 睡前数学 also leads on update cadence (every 9 days vs every 3 months). 诗歌中国's advantage is iOS requirement (9.0 vs 12.0). On price, ads and device support there is nothing between them.

Both are free to download. 诗歌中国 sells 15 one-off in-app purchases. 睡前数学 asks for nothing beyond the download.

诗歌中国 ships an update every 3 months, 睡前数学 every 9 days. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 诗歌中国 | 睡前数学 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Size | 95 MB | 381 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [文斐 郑](https://appshunter.io/developer/1018584339) | [晓飞 王](https://appshunter.io/developer/1553887580) |

## What reviewers say

### 诗歌中国

[App page](https://appshunter.io/ios/app/app/id1018584340)

**Features:** macOS Compatibility

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6诗豆 | $0.99 | one-time |
| 800诗币 | $0.99 | one-time |
| 8诗豆 | $0.99 | one-time |
| 18诗豆 | $2.99 | one-time |
| 1800诗币 | $2.99 | one-time |
| 5000诗币 | $6.99 | one-time |
| 50诗豆 | $7.99 | one-time |
| 98诗豆 | $14.99 | one-time |
| 9800诗币 | $14.99 | one-time |
| 198诗豆 | $29.99 | one-time |
| 19800诗币 | $29.99 | one-time |
| 388诗豆 | $59.99 | one-time |
| 38800诗币 | $59.99 | one-time |
| 58800诗币 | $79.99 | one-time |
| 588诗豆 | $89.99 | one-time |


### 睡前数学

[App page](https://appshunter.io/ios/app/id6461457294)

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

**In-app purchases:** none


## Frequently asked questions

### Is 诗歌中国 free?

诗歌中国 is free to download, with in-app purchases available.

### Is 睡前数学 free?

睡前数学 is free to download, with no in-app purchases.

### Do 诗歌中国 or 睡前数学 have ads?

Neither 诗歌中国 nor 睡前数学 shows ads.

### Which is updated more often, 诗歌中国 or 睡前数学?

诗歌中国 ships an update every 3 months, and 睡前数学 every 9 days. Most recently, 诗歌中国 was updated on October 4, 2026 and 睡前数学 on October 7, 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.*