# 书行天下 vs Torriden Certify

书行天下 and Torriden Certify are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

书行天下 ships an update every 3 months, Torriden Certify every 6 weeks. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 书行天下 | Torriden Certify |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Size | 12 MB | 66 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Netted Software Technology Co., Ltd.](https://appshunter.io/developer/582209585) | [The Coder](https://appshunter.io/developer/1205397694) |

## What reviewers say

### 书行天下

[App page](https://appshunter.io/ios/app/id1065394439)

**In-app purchases:** none


### Torriden Certify

[App page](https://appshunter.io/ios/app/torriden-certify/id6748661868)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 书行天下 free?

书行天下 is free to download, with no in-app purchases.

### Is Torriden Certify free?

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

### Do 书行天下 or Torriden Certify have ads?

Neither 书行天下 nor Torriden Certify shows ads.

### Which is updated more often, 书行天下 or Torriden Certify?

书行天下 ships an update every 3 months, and Torriden Certify every 6 weeks. Most recently, 书行天下 was updated on October 26, 2026 and Torriden Certify on October 28, 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.*