# marble.fit vs Repstack

The clearest difference is in-app purchases: marble.fit at none against Repstack's 2. Repstack's advantage is iOS requirement (15.1 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Repstack sells 2 in-app purchases, starting at $3.99 per month. marble.fit asks for nothing beyond the download.

marble.fit ships an update fortnightly, Repstack every 8 days. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | marble.fit | Repstack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 8 days** |
| Size | 10 MB | 41 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Lorenzo Quaid Sison](https://appshunter.io/developer/1821002361) | [Steven LaGuardia](https://appshunter.io/developer/1832396630) |

## What reviewers say

### marble.fit

[App page](https://appshunter.io/ios/app/marblefit/id6757725234)

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

**In-app purchases:** none


### Repstack

[App page](https://appshunter.io/ios/app/repstack-workout-planner/id6757782341)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Repstack Pro (Monthly) | $3.99 | per month |
| Repstack Pro (Yearly) | $23.99 | per year |


## Frequently asked questions

### Is marble.fit free?

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

### Is Repstack free?

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

### Do marble.fit or Repstack have ads?

Neither marble.fit nor Repstack shows ads.

### Which is updated more often, marble.fit or Repstack?

marble.fit ships an update fortnightly, and Repstack every 8 days. Most recently, marble.fit was updated on October 5, 2026 and Repstack on October 4, 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.*