# TwoTenDegrees vs Mountain Worksheet

The clearest difference is update cadence: TwoTenDegrees at every 9 days against Mountain Worksheet's every 5 weeks. 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.

TwoTenDegrees ships an update every 9 days, Mountain Worksheet every 5 weeks. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | TwoTenDegrees | Mountain Worksheet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/twotendegrees/id6504466524/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 5 weeks |
| Monetization | Free | — |
| Size | 1 MB | 4 MB |
| Requires iOS | **17.0** | 18.5 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Scott Sloan](https://appshunter.io/developer/1752409905) | [ezaero, Ltd.](https://appshunter.io/developer/646077624) |

## What reviewers say

### TwoTenDegrees

[App page](https://appshunter.io/ios/app/twotendegrees/id6504466524)

This utility calculates the impossible turn, a critical maneuver for pilots in case of engine failure. It provides precise calculations to help pilots determine the safest return to the runway.

**Highlights:** Impossible turn calculation, Engine failure scenario, Runway return planning, Pilot utility tool

**In-app purchases:** none


### Mountain Worksheet

[App page](https://appshunter.io/ios/app/mountain-worksheet/id6751735943)

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

**In-app purchases:** none


## Frequently asked questions

### Is TwoTenDegrees free?

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

### Is Mountain Worksheet free?

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

### Do TwoTenDegrees or Mountain Worksheet have ads?

Neither TwoTenDegrees nor Mountain Worksheet shows ads.

### Which is updated more often, TwoTenDegrees or Mountain Worksheet?

TwoTenDegrees ships an update every 9 days, and Mountain Worksheet every 5 weeks. Most recently, TwoTenDegrees was updated on October 13, 2026 and Mountain Worksheet on October 11, 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.*