# Viper Gym vs SKYLINE

The clearest difference is update cadence: Viper Gym at every 3 days against SKYLINE's every 3 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.

Viper Gym ships an update every 3 days, SKYLINE every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Viper Gym | SKYLINE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Size | 57 MB | 48 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Artem Sunduchkov](https://appshunter.io/developer/717659388) | [LUCKYSOFT OU](https://appshunter.io/developer/1242118176) |

## What reviewers say

### Viper Gym

[App page](https://appshunter.io/ios/app/viper-gym/id6744446367)

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

**In-app purchases:** none


### SKYLINE

[App page](https://appshunter.io/ios/app/skyline/id6748863891)

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

**In-app purchases:** none


## Frequently asked questions

### Is Viper Gym free?

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

### Is SKYLINE free?

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

### Do Viper Gym or SKYLINE have ads?

Neither Viper Gym nor SKYLINE shows ads.

### Which is updated more often, Viper Gym or SKYLINE?

Viper Gym ships an update every 3 days, and SKYLINE every 3 months. Most recently, Viper Gym was updated on October 24, 2026 and SKYLINE 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.*