Comparison

SubStandard vs QuickColdAlt

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SubStandard

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
Read full description

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.

About

QuickColdAlt

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
Read full description

**QuickColdAlt: The ultimate Cold Temperature Altitude Correction Calculator designed by an Airline Pilot.** - **Fast and Easy:** Calculate corrections in under 10 seconds with a simple and user-friendly interface. - **Clear and Reliable:** Accurate results are clearly displayed for your confidence. - **Perfect for Night Flights:** The default dark mode reduces eye strain, making it ideal for night operations. - **Always Free:** No cost, no ads—use it anytime, anywhere with peace of mind. With **QuickColdAlt**, save time, fly safer, and simplify your workflow. Download now and experience the difference! ( The airport data provided within the app serves as reference data only. If needed, it is recommended to manually input the desired airport elevation value. ) Visit our official website for more information : www.redswansoft.com App Credits & Licenses This app integrates various libraries and resources to deliver its features efficiently. The following libraries and resources are used: • mwgg/Airports: A JSON database of airports, provided under the MIT License. • Ionicons: Icons provided under the MIT License. • FontAwesome: Free icons provided under the Font Awesome Free License. • Google Fonts: Fonts provided under the Open Font License (OFL). Licenses This app complies with the licensing requirements of each resource. For example: • MIT License Permission is hereby granted, free of charge, to any person obtaining a copy of the software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. The software is provided “as is”, without warranty of any kind. • Open Font License (OFL) The fonts used in this app are free to use and distribute as long as they are not sold by themselves. Acknowledgment We deeply appreciate the creators and maintainers of these open-source libraries for enabling us to build a better app experience.

Screenshots

SubStandard4 screens
QuickColdAlt4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
SubStandard versus QuickColdAlt: the parameters behind the verdict, then further details
ParameterSubStandardQuickColdAlt
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings2 — better1
Update frequencyEvery 7 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better16.4
Further details — not scored
Size33 MB40 MB
Age rating4+4+
DeveloperiService Ottner RöckSEUNGSOO YOU

Customer experience

SubStandard

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

QuickColdAlt

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SubStandard

No in-app purchases

None

QuickColdAlt

No in-app purchases

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.

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