# Fast&Cold vs UDEERAI

The clearest difference is iOS requirement: UDEERAI at 13.0 against Fast&Cold's 15.1. 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.

Fast&Cold ships an update every 2 months, UDEERAI every 6 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Fast&Cold | UDEERAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Size | 39 MB | 49 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Innohub](https://appshunter.io/developer/1468230448) | [Zhejiang Udeer Robot Technology Co., Ltd](https://appshunter.io/developer/1788873037) |

## What reviewers say

### Fast&Cold

[App page](https://appshunter.io/ios/app/fast-and-cold/id1489908264)

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

**In-app purchases:** none


### UDEERAI

[App page](https://appshunter.io/ios/app/udeerai/id6736858888)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fast&Cold free?

Fast&Cold is free to download, with no in-app purchases.

### Is UDEERAI free?

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

### Do Fast&Cold or UDEERAI have ads?

Neither Fast&Cold nor UDEERAI shows ads.

### Which is updated more often, Fast&Cold or UDEERAI?

Fast&Cold ships an update every 2 months, and UDEERAI every 6 weeks. Most recently, Fast&Cold was updated on October 26, 2026 and UDEERAI on October 27, 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.*