# Ratio Calc! vs RC Maker Hub

The clearest difference is in-app purchases: RC Maker Hub at none against Ratio Calc!'s 4. RC Maker Hub also leads on update cadence (every 4 days vs every 4 months) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Ratio Calc! sells 4 one-off in-app purchases. RC Maker Hub asks for nothing beyond the download.

Ratio Calc! ships an update every 4 months, RC Maker Hub every 4 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ratio Calc! | RC Maker Hub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (26 ratings)](https://appshunter.io/ios/app/ratio-calc/id436311293/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 69 MB | 22 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David Mills](https://appshunter.io/developer/395985551) | [Remi Callens](https://appshunter.io/developer/6803438228) |

## What reviewers say

### Ratio Calc!

[App page](https://appshunter.io/ios/app/ratio-calc/id436311293)

This app helps radio control car racers calculate their final drive ratio and rollout. Easily select your car, input gear sizes, and get instant results. It also offers charts and saves favorite cars for quick access.

**Highlights:** Calculate Final Drive Ratio (FDR), Calculate Rollout with tire diameter, Filter cars by manufacturer and model, Save favorite cars, Select measurement units (imperial/metric), Select gear pitch, View ratio and rollout charts

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nice Tip | $0.99 | one-time |
| Generous Tip | $2.99 | one-time |
| Mega Tip | $4.99 | one-time |
| Insane Tip | $9.99 | one-time |

**What reviewers like**

- 👍 Excellent for RC gear ratios
- 👍 Great database of cars
- 👍 Simple and easy to use
- 👍 Invaluable at the track
- 👍 Time saver

**What reviewers complain about**

- 🐛 Latest version unusable
- 🐛 Cannot adjust tyre sizes
- 🐛 Cannot adjust gear ratio
- 🐛 Removed notes feature
- 🐛 Removed ability to save same vehicle twice

**Reported bugs**

- Cannot adjust tyre sizes in latest version
- Cannot adjust gear ratio in latest version
- Bug on iPad: 'done' button missing after setting pinion/spur
- Removed notes feature in latest update
- Removed ability to save same vehicle twice in latest update

**Requested features**

- Add Mod 1 pinions and spurs
- Add support for 1:8 e-buggies
- Reintroduce notes feature
- Reintroduce ability to save same vehicle twice
- Add iCloud backup or import/export feature


### RC Maker Hub

[App page](https://appshunter.io/ios/app/rc-maker-hub/id6803438226)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ratio Calc! free?

Ratio Calc! is free to download, with in-app purchases available.

### Is RC Maker Hub free?

RC Maker Hub is free to download, with no in-app purchases.

### Do Ratio Calc! or RC Maker Hub have ads?

Neither Ratio Calc! nor RC Maker Hub shows ads.

### Which is updated more often, Ratio Calc! or RC Maker Hub?

Ratio Calc! ships an update every 4 months, and RC Maker Hub every 4 days. Most recently, Ratio Calc! was updated on October 29, 2026 and RC Maker Hub on October 31, 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.*