# SidiroAR vs Altimeter + Barometermeter

The clearest difference is in-app purchases: SidiroAR at none against Altimeter + Barometermeter's 1. SidiroAR also leads on iOS requirement (11.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Altimeter + Barometermeter sells 1 in-app purchase, starting at $49.99 per year. SidiroAR asks for nothing beyond the download.

SidiroAR ships an update every 3 days, Altimeter + Barometermeter every 2 days. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | SidiroAR | Altimeter + Barometermeter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 48 MB | 4 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Milosz Rzeznik](https://appshunter.io/developer/1561721673) | [佳俊 高](https://appshunter.io/developer/1807816708) |

## What reviewers say

### SidiroAR

[App page](https://appshunter.io/ios/app/sidiroar/id1506789527)

**Features:** macOS Compatibility

**In-app purchases:** none


### Altimeter + Barometermeter

[App page](https://appshunter.io/ios/app/altimeter-plus-barometermeter/id6803945383)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Membership | $49.99 | per year |


## Frequently asked questions

### Is SidiroAR free?

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

### Is Altimeter + Barometermeter free?

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

### Do SidiroAR or Altimeter + Barometermeter have ads?

Neither SidiroAR nor Altimeter + Barometermeter shows ads.

### Which is updated more often, SidiroAR or Altimeter + Barometermeter?

SidiroAR ships an update every 3 days, and Altimeter + Barometermeter every 2 days. Most recently, SidiroAR was updated on October 18, 2026 and Altimeter + Barometermeter on October 19, 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.*