# HeatSafe vs Barometer on‑Wrist

The clearest difference is price: HeatSafe at Free against Barometer on‑Wrist's $0.99. HeatSafe also leads on iOS requirement (15.1 vs 26.0). Barometer on‑Wrist's advantage is in-app purchases (none vs 7). On update cadence, ads and device support there is nothing between them.

HeatSafe is free to download; Barometer on‑Wrist costs $0.99 up front. HeatSafe sells 7 in-app purchases, starting at $4.99 per month. Barometer on‑Wrist asks for nothing beyond the download.

HeatSafe ships an update every 9 days, Barometer on‑Wrist every 2 weeks. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | HeatSafe | Barometer on‑Wrist |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 39 MB | 5 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [MATTHEW ALEXANDER,NASH MCMURTREY](https://appshunter.io/developer/1884998540) | [晓玮 郭](https://appshunter.io/developer/1896738896) |

## What reviewers say

### HeatSafe

[App page](https://appshunter.io/ios/app/heatsafe/id6794441377)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HeatSafe Single Premium | $4.99 | per month |
| HeatSafe Company Sub - 5 Users | $9.99 | per month |
| HeatSafe - Coach Portal | $9.99 | per month |
| Company HeatSafe - 10 Users | $17.99 | per month |
| HeatSafe Company 20 Users | $29.99 | per month |
| HeatSafe Company 50 Users | $59.99 | per month |
| HeatSafe Company 100 Users | $99.99 | per month |


### Barometer on‑Wrist

[App page](https://appshunter.io/ios/app/barometer-onwrist/id6805385333)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is HeatSafe free?

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

### Is Barometer on‑Wrist free?

Barometer on‑Wrist costs $0.99, with no in-app purchases.

### Do HeatSafe or Barometer on‑Wrist have ads?

Neither HeatSafe nor Barometer on‑Wrist shows ads.

### Which is updated more often, HeatSafe or Barometer on‑Wrist?

HeatSafe ships an update every 9 days, and Barometer on‑Wrist every 2 weeks. Most recently, HeatSafe was updated on October 31, 2026 and Barometer on‑Wrist on November 3, 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.*