# Barometer & Altimeter vs BTLogger

The clearest difference is update cadence: BTLogger at daily against Barometer & Altimeter's every 3 weeks. BTLogger also leads on iOS requirement (11 vs 16.0). On price, ads, 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.

Barometer & Altimeter ships an update every 3 weeks, BTLogger daily. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Barometer & Altimeter | BTLogger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (28 ratings)](https://appshunter.io/ios/app/barometer-and-altimeter-howhigh/id921339656/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | — |
| Size | 9 MB | 53 MB |
| Requires iOS | 16.0 | **11** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thirty Seven Inc.](https://appshunter.io/developer/554594255) | [CUSTOM CORPORATION](https://appshunter.io/developer/1537927269) |

## What reviewers say

### Barometer & Altimeter

[App page](https://appshunter.io/ios/app/barometer-and-altimeter-howhigh/id921339656)

This app provides precise barometer and altimeter readings with live data, session recording, and historical analysis. It features automatic device calibration and supports various Apple devices and accessibility features.

**Highlights:** Dual barometer and altimeter dashboards, Real-time pressure and elevation readings, Session recording with rich datasets, Interactive Swift Charts for analysis, Automatic device calibration, Optional WeatherKit sea-level calibration

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

**In-app purchases:** none


### BTLogger

[App page](https://appshunter.io/ios/app/btlogger/id1537284730)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Barometer & Altimeter free?

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

### Is BTLogger free?

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

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

Neither Barometer & Altimeter nor BTLogger shows ads.

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

Barometer & Altimeter ships an update every 3 weeks, and BTLogger daily. Most recently, Barometer & Altimeter was updated on October 24, 2026 and BTLogger on October 7, 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.*