# SubStandard vs SnapCal+ BOYK

The clearest difference is update cadence: SnapCal+ BOYK at monthly against SubStandard's every 7 months. SubStandard's advantage is iOS requirement (12.0 vs 18.0). 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.

SubStandard ships an update every 7 months, SnapCal+ BOYK monthly. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SubStandard | SnapCal+ BOYK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/substandard/id1513656520/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | Free | — |
| Size | 33 MB | 4 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [iService Ottner Röck](https://appshunter.io/developer/1413717324) | [COLTON LYNN KINSTLEY](https://appshunter.io/developer/1824978049) |

## 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, Vision Pro support

**In-app purchases:** none


### SnapCal+ BOYK

[App page](https://appshunter.io/ios/app/snapcal-plus-boyk/id6748281465)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SubStandard free?

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

### Is SnapCal+ BOYK free?

SnapCal+ BOYK is free to download, with no in-app purchases.

### Do SubStandard or SnapCal+ BOYK have ads?

Neither SubStandard nor SnapCal+ BOYK shows ads.

### Which is updated more often, SubStandard or SnapCal+ BOYK?

SubStandard ships an update every 7 months, and SnapCal+ BOYK monthly. Most recently, SubStandard was updated on October 20, 2026 and SnapCal+ BOYK on October 13, 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.*