# 小音读书 vs TST FLY

The clearest difference is in-app purchases: TST FLY at none against 小音读书's 1. TST FLY also leads on update cadence (every 3 days vs weekly) and iOS requirement (9.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. 小音读书 sells 1 one-off in-app purchase. TST FLY asks for nothing beyond the download.

小音读书 ships an update weekly, TST FLY every 3 days. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | 小音读书 | TST FLY |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (15 ratings)](https://appshunter.io/ios/app/id984975207/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Size | 16 MB | 4 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [福中 王](https://appshunter.io/developer/920377229) | [SHENZHEN TOUCHSTONE TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1441759734) |

## What reviewers say

### 小音读书

[App page](https://appshunter.io/ios/app/id984975207)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All | $2.99 | one-time |


### TST FLY

[App page](https://appshunter.io/ios/app/tst-fly/id1441759735)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 小音读书 free?

小音读书 is free to download, with in-app purchases available.

### Is TST FLY free?

TST FLY is free to download, with no in-app purchases.

### Do 小音读书 or TST FLY have ads?

Neither 小音读书 nor TST FLY shows ads.

### Which is updated more often, 小音读书 or TST FLY?

小音读书 ships an update weekly, and TST FLY every 3 days. Most recently, 小音读书 was updated on November 1, 2026 and TST FLY on October 26, 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.*