# Keep warm vs Warm U

Keep warm and Warm U are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 8, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Keep warm | Warm U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.9 (14 ratings)](https://appshunter.io/ios/app/keep-warm/id6449612773/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free | — |
| Size | 2 MB | 19 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shenzhen Mijia Investment Co.,Ltd](https://appshunter.io/developer/1570759215) | [海洋 刘](https://appshunter.io/developer/1736870190) |

## What reviewers say

### Keep warm

[App page](https://appshunter.io/ios/app/keep-warm/id6449612773)

Control the heating temperature of your smart socks via Bluetooth from your smartphone. This app allows for seamless pairing and temperature adjustment, enhancing your comfort and quality of life.

**Highlights:** Bluetooth pairing, Temperature control, Smart life integration, Improved comfort

**Features:** macOS Compatibility

**In-app purchases:** none


### Warm U

[App page](https://appshunter.io/ios/app/warm-u/id6504526300)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Keep warm free?

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

### Is Warm U free?

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

### Do Keep warm or Warm U have ads?

Neither Keep warm nor Warm U shows ads.

### Which is updated more often, Keep warm or Warm U?

Keep warm ships an update weekly, and Warm U weekly. Most recently, Keep warm was updated on October 8, 2026 and Warm U on September 29, 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.*