# WatchBarometer vs SunTrace

The clearest difference is ads: WatchBarometer at none against SunTrace's shown. SunTrace's advantage is update cadence (monthly vs every 3 months) and iOS requirement (15.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. WatchBarometer sells 1 in-app purchase, starting at $3.99 per year and SunTrace sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

WatchBarometer ships an update every 3 months, SunTrace monthly. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | WatchBarometer | SunTrace |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Monthly** |
| Size | 9 MB | 54 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bernhard Hering](https://appshunter.io/developer/327542085) | [mint-soft](https://appshunter.io/developer/1158780075) |

## What reviewers say

### WatchBarometer

[App page](https://appshunter.io/ios/app/watchbarometer/id6762093745)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WatchBarometer Jahresabo | $3.99 | per year |


### SunTrace

[App page](https://appshunter.io/ios/app/suntrace-sun-and-moon-path/id6762113185)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SunTrace Pro | $1.99 | one-time |


## Frequently asked questions

### Is WatchBarometer free?

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

### Is SunTrace free?

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

### Do WatchBarometer or SunTrace have ads?

SunTrace shows ads; WatchBarometer does not.

### Which is updated more often, WatchBarometer or SunTrace?

WatchBarometer ships an update every 3 months, and SunTrace monthly. Most recently, WatchBarometer was updated on September 10, 2026 and SunTrace on September 17, 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.*