# STRNTH vs Kronos Studio

The clearest difference is update cadence: Kronos Studio at every 2 days against STRNTH's every 5 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. STRNTH sells 5 in-app purchases, starting at $4.99 per month and Kronos Studio sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

STRNTH ships an update every 5 days, Kronos Studio every 2 days. Both last shipped on September 18, 2026.

## The numbers

| Metric | STRNTH | Kronos Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Size | 74 MB | 97 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Next Big Leap Ltd](https://appshunter.io/developer/369344938) | [Muller Labs LLC](https://appshunter.io/developer/1884923229) |

## What reviewers say

### STRNTH

[App page](https://appshunter.io/ios/app/strnth-strength-training-30-plus/id6761745869)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STRNTH Plus Monthly | $4.99 | per month |
| STRNTH Pro Monthly | $14.99 | per month |
| STRNTH Plus Annual | $44.99 | per year |
| STRNTH Pro Founder Yearly | $54.99 | per year |
| STRNTH Pro Yearly | $99.99 | per year |


### Kronos Studio

[App page](https://appshunter.io/ios/app/kronos-studio/id6762472031)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kronos Pro Monthly | $7.99 | per month |
| Kronos Pro Yearly | $79.99 | per year |


## Frequently asked questions

### Is STRNTH free?

STRNTH is free to download, with in-app purchases available.

### Is Kronos Studio free?

Kronos Studio is free to download, with in-app purchases available.

### Do STRNTH or Kronos Studio have ads?

Neither STRNTH nor Kronos Studio shows ads.

### Which is updated more often, STRNTH or Kronos Studio?

STRNTH ships an update every 5 days, and Kronos Studio every 2 days. Most recently, STRNTH was updated on September 18, 2026 and Kronos Studio on September 18, 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.*