# Altimeter GPS Barometer vs TrueBearing

The clearest difference is ads: TrueBearing at none against Altimeter GPS Barometer's shown. Altimeter GPS Barometer's advantage is update cadence (every 3 days vs weekly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Altimeter GPS Barometer sells 3 one-off in-app purchases and TrueBearing sells 2 in-app purchases, starting at $3.99 per year. Whichever you choose, the download price is not the number that matters.

Altimeter GPS Barometer ships an update every 3 days, TrueBearing weekly. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Altimeter GPS Barometer | TrueBearing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Weekly |
| Size | 41 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [静华 黄](https://appshunter.io/developer/1501801862) | [光 韩](https://appshunter.io/developer/6772845629) |

## What reviewers say

### Altimeter GPS Barometer

[App page](https://appshunter.io/ios/app/altimeter-gps-barometer/id6475106813)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Forever Unlock Compass(Magic) | $0.99 | one-time |
| Forever Unlock Compass(Simple) | $1.99 | one-time |


### TrueBearing

[App page](https://appshunter.io/ios/app/truebearing/id6774950366)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrueBearing Pro | $3.99 | per year |
| TrueBearing Pro | $9.99 | one-time |


## Frequently asked questions

### Is Altimeter GPS Barometer free?

Altimeter GPS Barometer is free to download, with in-app purchases available.

### Is TrueBearing free?

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

### Do Altimeter GPS Barometer or TrueBearing have ads?

Altimeter GPS Barometer shows ads; TrueBearing does not.

### Which is updated more often, Altimeter GPS Barometer or TrueBearing?

Altimeter GPS Barometer ships an update every 3 days, and TrueBearing weekly. Most recently, Altimeter GPS Barometer was updated on October 4, 2026 and TrueBearing on October 25, 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.*