# SubStandard vs Jetlog

The clearest difference is in-app purchases: SubStandard at none against Jetlog's 3. SubStandard also leads on iOS requirement (12.0 vs 26.0). Jetlog's advantage is update cadence (every 10 days vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Jetlog sells 3 in-app purchases, starting at $2.99 per month. SubStandard asks for nothing beyond the download.

SubStandard ships an update every 7 months, Jetlog every 10 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SubStandard | Jetlog |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 33 MB | 35 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [iService Ottner Röck](https://appshunter.io/developer/1413717324) | [Deskpage](https://appshunter.io/developer/579935294) |

## 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


### Jetlog

[App page](https://appshunter.io/ios/app/jetlog-pilot-logbook/id6468457179)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $29.99 | per year |
| Logbook AI Scans Credit (50) | $2.99 | one-time |


## Frequently asked questions

### Is SubStandard free?

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

### Is Jetlog free?

Jetlog is free to download, with in-app purchases available.

### Do SubStandard or Jetlog have ads?

Neither SubStandard nor Jetlog shows ads.

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

SubStandard ships an update every 7 months, and Jetlog every 10 days. Most recently, SubStandard was updated on October 20, 2026 and Jetlog on October 24, 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.*