# Altimeter X. vs QR/BarCode Reader

The clearest difference is in-app purchases: QR/BarCode Reader at none against Altimeter X.'s 1. Altimeter X.'s advantage is ads (none vs shown) and iOS requirement (13.0 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Altimeter X. sells 1 one-off in-app purchase. QR/BarCode Reader asks for nothing beyond the download.

Altimeter X. ships an update every 5 days, QR/BarCode Reader every 4 days. The most recent releases landed on September 8, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | Altimeter X. | QR/BarCode Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | **Every 4 days** |
| Size | 49 MB | 24 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hubert Willy Lehmann](https://appshunter.io/developer/1684815110) | [Taisuke Hosokawa](https://appshunter.io/developer/1585548762) |

## What reviewers say

### Altimeter X.

[App page](https://appshunter.io/ios/app/altimeter-x/id6708236560)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### QR/BarCode Reader

[App page](https://appshunter.io/ios/app/qrbarcode-reader/id6742743893)

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

**In-app purchases:** none


## Frequently asked questions

### Is Altimeter X. free?

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

### Is QR/BarCode Reader free?

QR/BarCode Reader is free to download, with no in-app purchases.

### Do Altimeter X. or QR/BarCode Reader have ads?

QR/BarCode Reader shows ads; Altimeter X. does not.

### Which is updated more often, Altimeter X. or QR/BarCode Reader?

Altimeter X. ships an update every 5 days, and QR/BarCode Reader every 4 days. Most recently, Altimeter X. was updated on September 8, 2026 and QR/BarCode Reader on August 12, 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.*