# DiR Professional vs Nitro_Gym

The clearest difference is update cadence: Nitro_Gym at every 2 days against DiR Professional's every 12 months. DiR Professional's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DiR Professional ships an update every 12 months, Nitro_Gym every 2 days. The most recent releases landed on October 2, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | DiR Professional | Nitro_Gym |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 days** |
| Size | 42 MB | 124 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Fisikal Ltd](https://appshunter.io/developer/465613873) | [Nitro Gym](https://appshunter.io/developer/6807340326) |

## What reviewers say

### DiR Professional

[App page](https://appshunter.io/ios/app/dir-professional/id999865185)

**In-app purchases:** none


### Nitro_Gym

[App page](https://appshunter.io/ios/app/nitro-gym/id6807340324)

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

**In-app purchases:** none


## Frequently asked questions

### Is DiR Professional free?

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

### Is Nitro_Gym free?

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

### Do DiR Professional or Nitro_Gym have ads?

Neither DiR Professional nor Nitro_Gym shows ads.

### Which is updated more often, DiR Professional or Nitro_Gym?

DiR Professional ships an update every 12 months, and Nitro_Gym every 2 days. Most recently, DiR Professional was updated on October 2, 2026 and Nitro_Gym on October 20, 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.*