# 自律生物钟 vs 北斗星AI

The clearest difference is device support: 北斗星AI at 3 against 自律生物钟's 1. 北斗星AI also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

自律生物钟 ships an update every 2 weeks, 北斗星AI every 10 days. The most recent releases landed on September 12, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 自律生物钟 | 北斗星AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 8 MB | 74 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PT CITRA INTERNATIONAL DIGITAL](https://appshunter.io/developer/1770950914) | [重庆骏贤至科技有限公司](https://appshunter.io/developer/1754067115) |

## What reviewers say

### 自律生物钟

[App page](https://appshunter.io/ios/app/id6738274666)

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

**In-app purchases:** none


### 北斗星AI

[App page](https://appshunter.io/ios/app/ai/id6780371473)

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

**In-app purchases:** none


## Frequently asked questions

### Is 自律生物钟 free?

自律生物钟 is free to download, with no in-app purchases.

### Is 北斗星AI free?

北斗星AI is free to download, with no in-app purchases.

### Do 自律生物钟 or 北斗星AI have ads?

Neither 自律生物钟 nor 北斗星AI shows ads.

### Which is updated more often, 自律生物钟 or 北斗星AI?

自律生物钟 ships an update every 2 weeks, and 北斗星AI every 10 days. Most recently, 自律生物钟 was updated on September 12, 2026 and 北斗星AI on September 10, 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.*