# Odin Gym vs Nitro Athletic Complex

The clearest difference is update cadence: Nitro Athletic Complex at every 2 months against Odin Gym's every 5 months. 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.

Odin Gym ships an update every 5 months, Nitro Athletic Complex every 2 months. The most recent releases landed on June 2, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Odin Gym | Nitro Athletic Complex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (26 ratings)](https://appshunter.io/ios/app/nitro-athletic-complex/id6744453677/reviews)** |
| Number of ratings | — | **26** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 30 MB | 56 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ashbourne](https://appshunter.io/developer/1130933933) | [TeamUp Sports](https://appshunter.io/developer/1449504626) |

## What reviewers say

### Odin Gym

[App page](https://appshunter.io/ios/app/odin-gym/id6698863554)

**Features:** macOS Compatibility

**In-app purchases:** none


### Nitro Athletic Complex

[App page](https://appshunter.io/ios/app/nitro-athletic-complex/id6744453677)

This app guides your health and fitness journey by allowing you to book classes online. It integrates with Apple Health to track daily steps, distance, and calories burned, and can import data from wearable devices.

**Highlights:** Online class booking, Apple Health integration, Step tracking, Distance tracking, Calorie tracking, Wearable device data import

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Odin Gym free?

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

### Is Nitro Athletic Complex free?

Nitro Athletic Complex is free to download, with no in-app purchases.

### Do Odin Gym or Nitro Athletic Complex have ads?

Neither Odin Gym nor Nitro Athletic Complex shows ads.

### Which is updated more often, Odin Gym or Nitro Athletic Complex?

Odin Gym ships an update every 5 months, and Nitro Athletic Complex every 2 months. Most recently, Odin Gym was updated on June 2, 2026 and Nitro Athletic Complex on September 12, 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.*