# RackMath vs Hi

The clearest difference is in-app purchases: RackMath at none against Hi's 1. RackMath also leads on update cadence (weekly vs monthly). Hi's advantage is iOS requirement (16.6 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Hi sells 1 one-off in-app purchase. RackMath asks for nothing beyond the download.

RackMath ships an update weekly, Hi monthly. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | RackMath | Hi |
| --- | --- | --- |
| 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 | **Weekly** | Monthly |
| Monetization | Free | — |
| Size | 7 MB | 6 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Keith Jeffery](https://appshunter.io/developer/1887410568) | [Deniz Dogulu](https://appshunter.io/developer/1888339196) |

## What reviewers say

### 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:** none


### Hi

[App page](https://appshunter.io/ios/app/hi-pro/id6761231566)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $9.99 | one-time |


## Frequently asked questions

### Is RackMath free?

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

### Is Hi free?

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

### Do RackMath or Hi have ads?

Neither RackMath nor Hi shows ads.

### Which is updated more often, RackMath or Hi?

RackMath ships an update weekly, and Hi monthly. Most recently, RackMath was updated on October 1, 2026 and Hi on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*