# Robertt vs K

The clearest difference is review sentiment: Robertt at 67% against K's 0%. Robertt also leads on rating (4.0 vs 2.8) and update cadence (every 2 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Robertt holds the better App Store score, 4.0 against 2.8. Both are backed by a comparable volume of ratings — 17 and 10 respectively. Written reviews point the same way: 67% of Robertt's written reviews are positive against 0% of K's.

Robertt ships an update every 2 weeks, K every 2 months. The most recent releases landed on September 16, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Robertt | K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (17 ratings)](https://appshunter.io/ios/app/robertt/id1473930784/reviews)** | [2.8 (10 ratings)](https://appshunter.io/ios/app/k-one/id1540026334/reviews) |
| Number of ratings | **17** | 10 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 192 MB | 181 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [红 苗](https://appshunter.io/developer/1473580071) | [Robosen Robotics](https://appshunter.io/developer/1459364206) |

## What reviewers say

### Robertt

[App page](https://appshunter.io/ios/app/robertt/id1473930784)

Control a robot named Robert via Bluetooth for various interactive functions. You can remotely operate its movements, make it sing and dance, and even create custom dance routines.

**Highlights:** Bluetooth connectivity, Remote control interface, Singing functionality, Dancing capabilities, Dance editing

**Features:** macOS Compatibility

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-one/id1540026334)

Control a remote-controlled robot to perform various actions like walking, dancing, and stunts. Program custom dance routines using manual or block-based methods for educational and entertainment purposes.

**Highlights:** Remote robot control, Perform stunts and dance moves, Manual programming, Block-based programming, Program dance routines

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Robertt free?

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

### Is K free?

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

### Which has better reviews, Robertt or K?

Robertt is rated higher. Robertt averages 4.0 out of 5 from 17 ratings, while K averages 2.8 from 10 ratings.

### Do Robertt or K have ads?

Neither Robertt nor K shows ads.

### Which is updated more often, Robertt or K?

Robertt ships an update every 2 weeks, and K every 2 months. Most recently, Robertt was updated on September 16, 2026 and K on June 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.*