# Altimeter & Barometer vs threew

The clearest difference is ads: threew at none against Altimeter & Barometer's shown. threew also leads on update cadence (every 3 weeks vs every 13 months). Altimeter & Barometer's advantage is iOS requirement (15 vs 17.5). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Altimeter & Barometer ships an update every 13 months, threew every 3 weeks. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Altimeter & Barometer | threew |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (154 ratings)](https://appshunter.io/ios/app/altimeter-and-barometer/id541514339/reviews)** | — |
| Number of ratings | **154** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 11 MB | 1 MB |
| Requires iOS | **15** | 17.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Salih Bora Ozturk](https://appshunter.io/developer/1729658833) |

## What reviewers say

### Altimeter & Barometer

[App page](https://appshunter.io/ios/app/altimeter-and-barometer/id541514339)

This app provides real-time altitude and atmospheric pressure readings. It uses GPS for location and sea level measurements, with a conversion tool for meters to feet. For compatible devices, it also offers barometric pressure sensing.

**Highlights:** GPS altitude measurement, Sea level display in meters, Meter to feet conversion calculator, Barometric pressure sensor (iPhone 6+), Map of current position

**Features:** Vision Pro support

**In-app purchases:** none


### threew

[App page](https://appshunter.io/ios/app/threew/id6744202891)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Altimeter & Barometer free?

Altimeter & Barometer is free to download, with no in-app purchases.

### Is threew free?

threew is free to download, with no in-app purchases.

### Do Altimeter & Barometer or threew have ads?

Altimeter & Barometer shows ads; threew does not.

### Which is updated more often, Altimeter & Barometer or threew?

Altimeter & Barometer ships an update every 13 months, and threew every 3 weeks. Most recently, Altimeter & Barometer was updated on October 21, 2026 and threew 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.*