# Luftrum vs ChronoRate

The clearest difference is in-app purchases: Luftrum at none against ChronoRate's 1. Luftrum also leads on iOS requirement (10.0 vs 17.0). ChronoRate's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. ChronoRate sells 1 one-off in-app purchase. Luftrum asks for nothing beyond the download.

Luftrum ships an update every 3 months, ChronoRate every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Luftrum | ChronoRate |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 52 MB | 7 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [广东顺德凝卓智能科技有限公司](https://appshunter.io/developer/1109460026) | [Chieh Chung Tsou](https://appshunter.io/developer/1884205861) |

## What reviewers say

### Luftrum

[App page](https://appshunter.io/ios/app/luftrum/id1470373800)

**Features:** macOS Compatibility

**In-app purchases:** none


### ChronoRate

[App page](https://appshunter.io/ios/app/chronorate/id6760379687)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $7.99 | one-time |


## Frequently asked questions

### Is Luftrum free?

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

### Is ChronoRate free?

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

### Do Luftrum or ChronoRate have ads?

Neither Luftrum nor ChronoRate shows ads.

### Which is updated more often, Luftrum or ChronoRate?

Luftrum ships an update every 3 months, and ChronoRate every 3 weeks. Most recently, Luftrum was updated on November 3, 2026 and ChronoRate on October 31, 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.*