# Fox RT Guide vs Euler Gamma

The clearest difference is update cadence: Euler Gamma at every 9 days against Fox RT Guide's every 6 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.

Fox RT Guide ships an update every 6 weeks, Euler Gamma every 9 days. Both last shipped on September 9, 2026.

## The numbers

| Metric | Fox RT Guide | Euler Gamma |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Size | 3 MB | 14 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mind Fox Software Solutions Private Limited](https://appshunter.io/developer/1891994531) | [音 卢](https://appshunter.io/developer/1895433682) |

## What reviewers say

### Fox RT Guide

[App page](https://appshunter.io/ios/app/fox-rt-guide/id6761904066)

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

**In-app purchases:** none


### Euler Gamma

[App page](https://appshunter.io/ios/app/euler-gamma-ndt-calculator/id6772123721)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fox RT Guide free?

Fox RT Guide is free to download, with no in-app purchases.

### Is Euler Gamma free?

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

### Do Fox RT Guide or Euler Gamma have ads?

Neither Fox RT Guide nor Euler Gamma shows ads.

### Which is updated more often, Fox RT Guide or Euler Gamma?

Fox RT Guide ships an update every 6 weeks, and Euler Gamma every 9 days. Most recently, Fox RT Guide was updated on September 9, 2026 and Euler Gamma on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*