# SubStandard — Cold temperature corrections

> Aviation utility for cold temperature altitude corrections and saved altitude sets. (iPhone/iPad app by iService Ottner Röck.)

- Source: https://appshunter.io/ios/app/substandard/id1513656520 (this page in markdown: same URL + `.md`)
- Developer: [iService Ottner Röck](https://appshunter.io/developer/1413717324)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 33 MB
- Languages: English
- Released: 2020-06-22
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/substandard/id1513656520/reviews.md

## What is SubStandard?

SubStandard is an easy to use app to apply cold temperature corrections in aviation. Moreover, it lets you store sets of altitudes for quick access later on.

## Key features

- Cold temperature corrections
- Altitude set storage
- Quick access to saved altitudes
- Easy to use interface

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/substandard/id1513656520/reviews.md

### 1/5 — Not accurate or safe

*2022-02-23*

This app doesn’t accurately reflect the transport Canada cap gen temp correct charts. Be weary using these numbers

## Frequently asked questions about SubStandard

### What is SubStandard used for?

SubStandard is an aviation utility designed to help pilots apply cold temperature corrections to altitudes. It also allows for the storage and quick retrieval of custom altitude sets.

### Is SubStandard free to use?

Yes, SubStandard is available for free. There are no in-app purchases or subscription fees associated with its use.

### What devices does SubStandard support?

SubStandard is compatible with iPhone, iPad, and iPod touch devices, running on iOS.

### How often is SubStandard updated?

The app was last updated on June 18, 2025, indicating active development and maintenance by the developer.

### What is the age rating for SubStandard?

SubStandard has an age rating of 4+, making it suitable for a wide range of users.

### How accurate are the cold temperature corrections in SubStandard?

The app is designed to apply standard cold temperature corrections used in aviation. While the app itself is a tool, the accuracy of the correction depends on the input data provided by the user.

### Can I save multiple sets of altitudes in SubStandard?

Yes, SubStandard allows you to store sets of altitudes for quick access later on, which is useful for frequently used flight plans or routes.

### What do users think of SubStandard?

Based on the available data, SubStandard has a perfect 5.0-star rating from 2 reviews, suggesting a very positive user reception.

## Version history (last 5 releases)

### 1.1.3 — 2025-06-18

- added functionality to export and import the database

### 1.1.1 — 2022-04-02

- implemented "accurate" formula ("specific conditions" still available as well)
- changed references accordingly
- added special thanks (credit where credit is due)
- restructured settings screen(s)
- changed splash screen implementation
- fixed mailto not working

### 1.0.3 — 2022-01-11

- added iPad support: split screen operation now possible
- fixed minor bugs

### 1.0.2 — 2021-02-15

- updated ICAO reference
- increased temperature adjust button size
- limited selectable temperature from -50°C to +15°C
- limited elevation to 10000ft
- added colored error for altitude values which are not within elevation + 5000ft
- minor bug fixes

### 1.0.1 — 2021-01-18

- update ICAO reference
- increase temperature adjust button size
- limit selectable temperature from -50°C to +15°C
- limit elevation to 10000ft
- provide colored error for altitude values which are not within elevation + 5000ft

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| [Pf Fidelity](https://appshunter.io/ios/app/pf-fidelity/id1434839440) | — | Free | Utilities |
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## More apps by iService Ottner Röck

- [TalkClok. Talking alarm clock.](https://appshunter.io/ios/app/talkclok-talking-alarm-clock/id1413717325)
- [3in90](https://appshunter.io/ios/app/3in90/id1505722113)
- [Pitchable - pitch accelerator](https://appshunter.io/ios/app/pitchable-pitch-accelerator/id1524429942)

All apps by iService Ottner Röck: https://appshunter.io/developer/1413717324

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*