# 天天小牛 vs 行者AI

The clearest difference is in-app purchases: 行者AI at none against 天天小牛's 2. 行者AI also leads on update cadence (daily vs every 7 months). 天天小牛's advantage is iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. 天天小牛 sells 2 one-off in-app purchases. 行者AI asks for nothing beyond the download.

天天小牛 ships an update every 7 months, 行者AI daily. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 天天小牛 | 行者AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Daily** |
| Size | 61 MB | 3 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hefei Maniu Software Technology Co., Ltd.](https://appshunter.io/developer/1806533752) | [东海 李](https://appshunter.io/developer/1144318243) |

## What reviewers say

### 天天小牛

[App page](https://appshunter.io/ios/app/id6744204824)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 数据服务（年） | $29.99 | one-time |
| 至尊会员 PRO | $69.99 | one-time |


### 行者AI

[App page](https://appshunter.io/ios/app/ai/id6746710025)

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

**In-app purchases:** none


## Frequently asked questions

### Is 天天小牛 free?

天天小牛 is free to download, with in-app purchases available.

### Is 行者AI free?

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

### Do 天天小牛 or 行者AI have ads?

Neither 天天小牛 nor 行者AI shows ads.

### Which is updated more often, 天天小牛 or 行者AI?

天天小牛 ships an update every 7 months, and 行者AI daily. Most recently, 天天小牛 was updated on October 24, 2026 and 行者AI on October 15, 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.*