# CrossFit 781 vs RackMath

The clearest difference is in-app purchases: CrossFit 781 at none against RackMath's 3. CrossFit 781 also leads on update cadence (daily vs weekly) and iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. RackMath sells 3 in-app purchases, starting at $9.99 per month. CrossFit 781 asks for nothing beyond the download.

CrossFit 781 ships an update daily, RackMath weekly. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | CrossFit 781 | RackMath |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (4 ratings)](https://appshunter.io/ios/app/rackmath/id6761032029/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Weekly |
| Monetization | — | Free |
| Size | 56 MB | 7 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Kaali Healthcare Private Limited](https://appshunter.io/developer/1797063484) | [Keith Jeffery](https://appshunter.io/developer/1887410568) |

## What reviewers say

### CrossFit 781

[App page](https://appshunter.io/ios/app/crossfit-781/id6755334242)

**Features:** macOS Compatibility

**In-app purchases:** none


### RackMath

[App page](https://appshunter.io/ios/app/rackmath/id6761032029)

This app removes the guesswork from loading a barbell, providing color-coded diagrams for precise plate loading. It offers alternative weight options when exact matches aren't possible and allows for real-time bar monitoring as plates are added or removed.

**Highlights:** Color-coded plate diagrams, Nearest weight alternatives, Customizable plate inventory, Real-time bar weight monitoring, Multiple barbell setup organization, Efficient weight transitions

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access to Coach | $9.99 | per month |
| Annual Access to Coach | $49.99 | per year |
| Lifetime Full Access | $99.99 | one-time |


## Frequently asked questions

### Is CrossFit 781 free?

CrossFit 781 is free to download, with no in-app purchases.

### Is RackMath free?

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

### Do CrossFit 781 or RackMath have ads?

Neither CrossFit 781 nor RackMath shows ads.

### Which is updated more often, CrossFit 781 or RackMath?

CrossFit 781 ships an update daily, and RackMath weekly. Most recently, CrossFit 781 was updated on October 18, 2026 and RackMath on October 19, 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.*