# Heatzy FLAT vs Kaidan.

The clearest difference is in-app purchases: Heatzy FLAT at none against Kaidan.'s 1. Heatzy FLAT also leads on iOS requirement (10.0 vs 15.0). Kaidan.'s advantage is update cadence (every 3 months vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. Kaidan. sells 1 in-app purchase, starting at $8.99 per month. Heatzy FLAT asks for nothing beyond the download.

Heatzy FLAT ships an update every 8 months, Kaidan. every 3 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Heatzy FLAT | Kaidan. |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 20 MB | 6 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Heatzy](https://appshunter.io/developer/1139669586) | [Thibaut Comte-Sponville](https://appshunter.io/developer/1809358902) |

## What reviewers say

### Heatzy FLAT

[App page](https://appshunter.io/ios/app/heatzy-flat/id1486475906)

Control your connected towel dryer via Bluetooth to personalize heating schedules and optimize comfort. Save energy with custom programs, boost functions, and smart detection features.

**Highlights:** Bluetooth control, Customizable heating schedules, Energy saving modes, Boost function, Open window detection, Vacation mode

**Features:** macOS Compatibility

**In-app purchases:** none


### Kaidan.

[App page](https://appshunter.io/ios/app/kaidan/id6744820070)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kaidan Plus | $8.99 | per month |


## Frequently asked questions

### Is Heatzy FLAT free?

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

### Is Kaidan. free?

Kaidan. is free to download, with in-app purchases available.

### Do Heatzy FLAT or Kaidan. have ads?

Neither Heatzy FLAT nor Kaidan. shows ads.

### Which is updated more often, Heatzy FLAT or Kaidan.?

Heatzy FLAT ships an update every 8 months, and Kaidan. every 3 months. Most recently, Heatzy FLAT was updated on November 3, 2026 and Kaidan. 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.*