# Mechanical Formula vs KAI Robotics

The clearest difference is rating: Mechanical Formula at 4.7 against KAI Robotics's 3.6. Mechanical Formula also leads on update cadence (every 4 months vs every 16 months). KAI Robotics's advantage is in-app purchases (none vs 1) and review sentiment (27% vs 0%). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Mechanical Formula sells 1 one-off in-app purchase. KAI Robotics asks for nothing beyond the download.

Mechanical Formula holds the better App Store score, 4.7 against 3.6. Both are backed by a comparable volume of ratings — 34 and 12 respectively. Written reviews complicate that: 0% of Mechanical Formula's written reviews are positive against 27% of KAI Robotics's, so the app with the better star average is not the one people write more warmly about.

Mechanical Formula ships an update every 4 months, KAI Robotics every 16 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Mechanical Formula | KAI Robotics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (34 ratings)](https://appshunter.io/ios/app/mechanical-formula/id1668948373/reviews)** | [3.6 (12 ratings)](https://appshunter.io/ios/app/kai-robotics/id6447761719/reviews) |
| Number of ratings | **34** | 12 |
| Positive reviews | 0.0% of reviews | **27.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 16 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 42 MB | 68 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [Franckh-Kosmos Verlags GmbH & Co. KG](https://appshunter.io/developer/375309682) |

## What reviewers say

### Mechanical Formula

[App page](https://appshunter.io/ios/app/mechanical-formula/id1668948373)

This app provides over 200 essential mechanical engineering formulas and calculations in a user-friendly tool. It's designed to simplify complex concepts and speed up problem-solving for students, professionals, and educators.

**Highlights:** 200+ mechanical engineering formulas, Instant calculations, Intuitive interface, Real-world application explanations, Exam preparation aid, Lifetime Premium option

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

**In-app purchases (1)**

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


### KAI Robotics

[App page](https://appshunter.io/ios/app/kai-robotics/id6447761719)

Build and control an AI robot using your device. Collect data, train the AI model with gestures and sounds, and then play with your robot. Offers remote control and customization options for the robot's LED display.

**Highlights:** Build an AI robot, Gesture recognition control, Sound recognition control, Train AI models, Offline data processing, Remote control mode, Customizable LED display

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mechanical Formula free?

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

### Is KAI Robotics free?

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

### Which has better reviews, Mechanical Formula or KAI Robotics?

Mechanical Formula is rated higher. Mechanical Formula averages 4.7 out of 5 from 34 ratings, while KAI Robotics averages 3.6 from 12 ratings.

### Do Mechanical Formula or KAI Robotics have ads?

Neither Mechanical Formula nor KAI Robotics shows ads.

### Which is updated more often, Mechanical Formula or KAI Robotics?

Mechanical Formula ships an update every 4 months, and KAI Robotics every 16 months. Most recently, Mechanical Formula was updated on November 3, 2026 and KAI Robotics on November 3, 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.*