# Traceability vs 子衿听书

The clearest difference is in-app purchases: Traceability at none against 子衿听书's 2. Traceability also leads on iOS requirement (12.0 vs 16.0). 子衿听书's advantage is device support. On price there is nothing between them.

Both are free to download. 子衿听书 sells 2 in-app purchases, starting at $9.99 per year. Traceability asks for nothing beyond the download.

## The numbers

| Metric | Traceability | 子衿听书 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Fortnightly |
| Size | 60 MB | 30 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Shanghai Run'enma Technology Co., Ltd.](https://appshunter.io/developer/1678453916) | [Guangzhou Feynman Information Technology Co., Ltd.](https://appshunter.io/developer/1444983702) |

## What reviewers say

### Traceability

[App page](https://appshunter.io/ios/app/traceability/id6467606763)

**In-app purchases:** none


### 子衿听书

[App page](https://appshunter.io/ios/app/txtpdfepubai/id6752794227)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 包年畅听 | $9.99 | per year |
| 终身购买 | $29.99 | one-time |


## Frequently asked questions

### Is Traceability free?

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

### Is 子衿听书 free?

子衿听书 is free to download, with in-app purchases available.

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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.*