# 3in90 vs QuickColdAlt

The clearest difference is update cadence: 3in90 at every 5 days against QuickColdAlt's every 11 days. 3in90 also leads on iOS requirement (9.0 vs 16.4). 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.

3in90 ships an update every 5 days, QuickColdAlt every 11 days. The most recent releases landed on September 22, 2026 and August 1, 2026 respectively.

## The numbers

| Metric | 3in90 | QuickColdAlt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quickcoldalt/id6739363484/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 11 days |
| Monetization | — | Free |
| Size | 50 MB | 40 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iService Ottner Röck](https://appshunter.io/developer/1413717324) | [SEUNGSOO YOU](https://appshunter.io/developer/1785034668) |

## What reviewers say

### 3in90

[App page](https://appshunter.io/ios/app/3in90/id1505722113)

**Features:** macOS Compatibility

**In-app purchases:** none


### QuickColdAlt

[App page](https://appshunter.io/ios/app/quickcoldalt/id6739363484)

This utility calculates temperature and altitude corrections for flight operations. It offers a user-friendly interface for quick and reliable results, with a dark mode ideal for night flying. The app is completely free and ad-free.

**Highlights:** Temperature and altitude correction calculation, User-friendly interface, Fast results (under 10 seconds), Clear and reliable display, Dark mode for night flights, Completely free and ad-free

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3in90 free?

3in90 is free to download, with no in-app purchases.

### Is QuickColdAlt free?

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

### Do 3in90 or QuickColdAlt have ads?

Neither 3in90 nor QuickColdAlt shows ads.

### Which is updated more often, 3in90 or QuickColdAlt?

3in90 ships an update every 5 days, and QuickColdAlt every 11 days. Most recently, 3in90 was updated on September 22, 2026 and QuickColdAlt on August 1, 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.*