# RobotMake vs 21 Sharp

The clearest difference is rating: 21 Sharp at 5.0 against RobotMake's 1.8. RobotMake's advantage is in-app purchases (none vs 1) and ratings volume (4 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. 21 Sharp sells 1 one-off in-app purchase. RobotMake asks for nothing beyond the download.

21 Sharp holds the better App Store score, 5.0 against 1.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

## The numbers

| Metric | RobotMake | 21 Sharp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (4 ratings)](https://appshunter.io/ios/app/robotmake/id1525516513/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/21-sharp/id6757319502/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | **Free** | Free with in-app purchases |
| Size | 125 MB | 1 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [广州途道信息科技有限公司](https://appshunter.io/developer/1228572324) | [busyslacker llc](https://appshunter.io/developer/1576079901) |

## What reviewers say

### RobotMake

[App page](https://appshunter.io/ios/app/robotmake/id1525516513)

This app allows users to control robots using programmable blocks. It offers guided assembly and installation tutorials for mechanical and robot components, enabling users to create custom robot movements and actions.

**Highlights:** Robot control (forward, backward, turn), Block assembly and installation tutorials, Blockly programming interface, Progress tracking for assembly, Mechanical Master block programming

**Features:** macOS Compatibility

**In-app purchases:** none


### 21 Sharp

[App page](https://appshunter.io/ios/app/21-sharp/id6757319502)

Master blackjack strategy and card counting with this professional-grade trainer. Learn optimal plays, practice counting systems, and track your progress with realistic simulations and reference guides. Reduce the house edge and gain a competitive advantage.

**Highlights:** Basic strategy training, Card counting drills (Hi-Lo), Realistic practice table, Reference guides, Progress tracking and achievements

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 21 Sharp Premium | $2.99 | one-time |


## Frequently asked questions

### Is RobotMake free?

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

### Is 21 Sharp free?

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

### Which has better reviews, RobotMake or 21 Sharp?

21 Sharp is rated higher. RobotMake averages 1.8 out of 5 from 4 ratings, while 21 Sharp averages 5.0 from 1 ratings.

### Do RobotMake or 21 Sharp have ads?

Neither RobotMake nor 21 Sharp 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.*