# STRNTH vs Mariabs · Interval Timer

The clearest difference is in-app purchases: Mariabs · Interval Timer at none against STRNTH's 5. On price, update cadence, ads 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. Mariabs · Interval Timer asks for nothing beyond the download.

STRNTH ships an update every 5 days, Mariabs · Interval Timer every 6 days. The most recent releases landed on September 18, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | STRNTH | Mariabs · Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 days |
| Size | 74 MB | 4 MB |
| Requires iOS | **15.1** | 16.2 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Next Big Leap Ltd](https://appshunter.io/developer/369344938) | [PER MAGNE HELSETH](https://appshunter.io/developer/1895962879) |

## 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 |


### Mariabs · Interval Timer

[App page](https://appshunter.io/ios/app/mariabs-interval-timer/id6765472133)

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

**In-app purchases:** none


## Frequently asked questions

### Is STRNTH free?

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

### Is Mariabs · Interval Timer free?

Mariabs · Interval Timer is free to download, with no in-app purchases.

### Do STRNTH or Mariabs · Interval Timer have ads?

Neither STRNTH nor Mariabs · Interval Timer shows ads.

### Which is updated more often, STRNTH or Mariabs · Interval Timer?

STRNTH ships an update every 5 days, and Mariabs · Interval Timer every 6 days. Most recently, STRNTH was updated on September 18, 2026 and Mariabs · Interval Timer on September 21, 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.*