# Barometer Assistant vs Altimeter

The clearest difference is update cadence: Barometer Assistant at every 10 days against Altimeter's every 4 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Barometer Assistant sells 3 in-app purchases, starting at $1.99 per 7 days and Altimeter sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Barometer Assistant ships an update every 10 days, Altimeter every 4 weeks. The most recent releases landed on September 12, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Barometer Assistant | Altimeter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 weeks |
| Size | 5 MB | 8 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [三三 杨](https://appshunter.io/developer/1852457327) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Barometer Assistant

[App page](https://appshunter.io/ios/app/barometer-assistant/id6757361770)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly Subscription | $5.99 | per month |
| Annual Subscription | $39.99 | per year |


### Altimeter

[App page](https://appshunter.io/ios/app/altimeter-gps-elevation/id6772261844)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Climb Log: Weekly | $2.99 | per 7 days |
| Summit Height: Yearly | $14.99 | per year |
| Offline Altitude: Pay Once | $29.99 | one-time |


## Frequently asked questions

### Is Barometer Assistant free?

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

### Is Altimeter free?

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

### Do Barometer Assistant or Altimeter have ads?

Neither Barometer Assistant nor Altimeter shows ads.

### Which is updated more often, Barometer Assistant or Altimeter?

Barometer Assistant ships an update every 10 days, and Altimeter every 4 weeks. Most recently, Barometer Assistant was updated on September 12, 2026 and Altimeter on August 21, 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.*