# SunFounder Controller vs K

The clearest difference is review sentiment: SunFounder Controller at 95% against K's 0%. SunFounder Controller also leads on rating (4.4 vs 2.8) and iOS requirement (11.0 vs 13.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

SunFounder Controller holds the better App Store score, 4.4 against 2.8. Both are backed by a comparable volume of ratings — 28 and 10 respectively. Written reviews point the same way: 95% of SunFounder Controller's written reviews are positive against 0% of K's.

SunFounder Controller ships an update every 3 months, K every 2 months. The most recent releases landed on September 11, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | SunFounder Controller | K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (28 ratings)](https://appshunter.io/ios/app/sunfounder-controller/id1538719422/reviews)** | [2.8 (10 ratings)](https://appshunter.io/ios/app/k-one/id1540026334/reviews) |
| Number of ratings | **28** | 10 |
| Positive reviews | **94.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 92 MB | 181 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Maker Stars Technology Co., Ltd.](https://appshunter.io/developer/1422345349) | [Robosen Robotics](https://appshunter.io/developer/1459364206) |

## What reviewers say

### SunFounder Controller

[App page](https://appshunter.io/ios/app/sunfounder-controller/id1538719422)

This app acts as a virtual remote control for robot kits powered by ESP32 and Raspberry Pi. It offers customizable controls like radar ranging, tracking, sliders, buttons, and arrow keys for interactive robot operation.

**Highlights:** Virtual remote control, ESP32 and Raspberry Pi compatibility, Radar ranging control, Three-channel tracking, Customizable control layout, Sliders, buttons, and arrow keys

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 👍 Great app
- 👍 Useful
- 👍 Good functionality
- 👍 Powerful features

**What reviewers complain about**

- 🐛 Needs to be more stable
- 🐛 Needs to be more user-friendly
- 🐛 Disconnects and won't reconnect without reinstallation
- 🐛 Link button off-screen on iPhone XS Max

**Reported bugs**

- App disconnects and requires reinstallation to reconnect
- Link button is off-screen on iPhone XS Max

**Requested features**

- Add a list-box or radio-button widget class
- More warm functions


### 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 SunFounder Controller free?

SunFounder Controller 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, SunFounder Controller or K?

SunFounder Controller is rated higher. SunFounder Controller averages 4.4 out of 5 from 28 ratings, while K averages 2.8 from 10 ratings.

### Do SunFounder Controller or K have ads?

Neither SunFounder Controller nor K shows ads.

### Which is updated more often, SunFounder Controller or K?

SunFounder Controller ships an update every 3 months, and K every 2 months. Most recently, SunFounder Controller was updated on September 11, 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.*