# Now Altimeter vs Altimeter GPS Barometer

The clearest difference is ads: Now Altimeter at none against Altimeter GPS Barometer's shown. Now Altimeter also leads on device support (3 vs 1). Altimeter GPS Barometer's advantage is update cadence (every 3 days vs every 3 weeks). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Now Altimeter sells 3 in-app purchases, starting at $2.99 per month and Altimeter GPS Barometer sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Now Altimeter ships an update every 3 weeks, Altimeter GPS Barometer every 3 days. The most recent releases landed on October 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Now Altimeter | Altimeter GPS Barometer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 50 MB | 41 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gerhard Kanzler](https://appshunter.io/developer/592322016) | [静华 黄](https://appshunter.io/developer/1501801862) |

## What reviewers say

### Now Altimeter

[App page](https://appshunter.io/ios/app/now-altimeter/id1039946633)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Now Altimeter Pro –  Monthly | $2.99 | per month |
| Now Altimeter Pro – Yearly | $19.99 | per year |
| Custom Design Editor | $2.99 | one-time |


### 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 |


## Frequently asked questions

### Is Now Altimeter free?

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

### Is Altimeter GPS Barometer free?

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

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

Altimeter GPS Barometer shows ads; Now Altimeter does not.

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

Now Altimeter ships an update every 3 weeks, and Altimeter GPS Barometer every 3 days. Most recently, Now Altimeter was updated on October 29, 2026 and Altimeter GPS Barometer on October 4, 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.*