# Four vs ANNTO

The clearest difference is update cadence: ANNTO at monthly against Four's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Four ships an update every 2 months, ANNTO monthly. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Four | ANNTO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 58 MB | 33 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Xiamen Sixin IoT Technology Co., Ltd.](https://appshunter.io/developer/1438611291) | [Lebi Computer Technology Co. Ltd.](https://appshunter.io/developer/1004823999) |

## What reviewers say

### Four

[App page](https://appshunter.io/ios/app/four-faith-sensor-cloud/id6451084198)

**Features:** macOS Compatibility

**In-app purchases:** none


### ANNTO

[App page](https://appshunter.io/ios/app/annto/id6471961238)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Four free?

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

### Is ANNTO free?

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

### Do Four or ANNTO have ads?

Neither Four nor ANNTO shows ads.

### Which is updated more often, Four or ANNTO?

Four ships an update every 2 months, and ANNTO monthly. Most recently, Four was updated on October 27, 2026 and ANNTO on October 30, 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.*