# 归零 vs Bookify

The clearest difference is iOS requirement: 归零 at 13.0 against Bookify's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 归零 sells 2 one-off in-app purchases and Bookify sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on November 5, 2026.

## The numbers

| Metric | 归零 | Bookify |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 56 MB | 79 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [合肥美美云科技有限公司](https://appshunter.io/developer/1758732435) | [伟强 周](https://appshunter.io/developer/791062588) |

## What reviewers say

### 归零

[App page](https://appshunter.io/ios/app/id6759585650)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 归零年会员 | $2.99 | one-time |
| 归零终身会员 | $4.99 | one-time |


### Bookify

[App page](https://appshunter.io/ios/app/bookify/id6761409152)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $1.99 | per month |
| 年度会员 | $14.99 | per year |


## Frequently asked questions

### Is 归零 free?

归零 is free to download, with in-app purchases available.

### Is Bookify free?

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

### Do 归零 or Bookify have ads?

Neither 归零 nor Bookify shows ads.

### Which is updated more often, 归零 or Bookify?

归零 ships an update every 2 months, and Bookify every 2 months. Most recently, 归零 was updated on November 5, 2026 and Bookify on November 5, 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.*