# Ratio Calc! vs Karate Buddy

The clearest difference is in-app purchases: Karate Buddy at none against Ratio Calc!'s 4. Karate Buddy also leads on rating (5.0 vs 4.5) and iOS requirement (10.0 vs 17.0). Ratio Calc!'s advantage is ratings volume (26 vs 1). 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. Karate Buddy asks for nothing beyond the download.

Karate Buddy holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Ratio Calc! has 26 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Ratio Calc! | Karate Buddy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (26 ratings)](https://appshunter.io/ios/app/ratio-calc/id436311293/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/karate-buddy/id1528775072/reviews)** |
| Number of ratings | **26** | 1 |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 69 MB | 68 MB |
| Requires iOS | 17.0 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [David Mills](https://appshunter.io/developer/395985551) | [KUMITE COACH LTD](https://appshunter.io/developer/1528775074) |

## 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


### Karate Buddy

[App page](https://appshunter.io/ios/app/karate-buddy/id1528775072)

This app acts as a training aid for martial arts practitioners, offering randomized drills, directional commands, and workout timing. It's designed to enhance solo training, coaching, and fitness development by providing structured guidance.

**Highlights:** Randomized work periods, Directional commands, Numbered commands (English/Japanese), Randomized bleep function, Workout timer, Solo and 1-2-1 coaching aid

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ratio Calc! free?

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

### Is Karate Buddy free?

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

### Which has better reviews, Ratio Calc! or Karate Buddy?

Karate Buddy is rated higher. Ratio Calc! averages 4.5 out of 5 from 26 ratings, while Karate Buddy averages 5.0 from 1 ratings.

### Do Ratio Calc! or Karate Buddy have ads?

Neither Ratio Calc! nor Karate Buddy shows ads.

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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.*