# SubStandard vs QuickColdAlt

SubStandard and QuickColdAlt both sit at 5.0 stars, but that hides the real split: 100% of QuickColdAlt's written reviews are positive against 0% of SubStandard's. QuickColdAlt also leads on update cadence (every 11 days vs every 7 months). SubStandard's advantage is iOS requirement (12.0 vs 16.4). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for SubStandard against 5.0 for QuickColdAlt. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews are what separate them: 0% of SubStandard's written reviews are positive against 100% of QuickColdAlt's.

SubStandard ships an update every 7 months, QuickColdAlt every 11 days. The most recent releases landed on September 9, 2026 and August 1, 2026 respectively.

## The numbers

| Metric | SubStandard | QuickColdAlt |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/substandard/id1513656520/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/quickcoldalt/id6739363484/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 11 days** |
| Monetization | Free | Free |
| Size | 33 MB | 40 MB |
| Requires iOS | **12.0** | 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

### SubStandard

[App page](https://appshunter.io/ios/app/substandard/id1513656520)

This aviation utility app simplifies applying cold temperature corrections for altitudes. It allows users to save frequently used altitude sets for rapid retrieval, enhancing efficiency in flight planning.

**Highlights:** Cold temperature corrections, Altitude set storage, Quick access to saved altitudes, Easy to use interface

**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 SubStandard free?

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

### Is QuickColdAlt free?

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

### Which has better reviews, SubStandard or QuickColdAlt?

SubStandard and QuickColdAlt are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do SubStandard or QuickColdAlt have ads?

Neither SubStandard nor QuickColdAlt shows ads.

### Which is updated more often, SubStandard or QuickColdAlt?

SubStandard ships an update every 7 months, and QuickColdAlt every 11 days. Most recently, SubStandard was updated on September 9, 2026 and QuickColdAlt on August 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*