# Robot Motion vs Sunain

The clearest difference is update cadence: Sunain at every 2 days against Robot Motion's monthly. Robot Motion's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Robot Motion ships an update monthly, Sunain every 2 days. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Robot Motion | Sunain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 93 MB | 12 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PHX SMART SCHOOL SOLUTIONS JOINT STOCK COMPANY](https://appshunter.io/developer/1647312243) | [Zurons, Inc.](https://appshunter.io/developer/1764155077) |

## What reviewers say

### Robot Motion

[App page](https://appshunter.io/ios/app/robot-motion/id6754234275)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sunain

[App page](https://appshunter.io/ios/app/sunain/id6759480370)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Robot Motion free?

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

### Is Sunain free?

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

### Do Robot Motion or Sunain have ads?

Neither Robot Motion nor Sunain shows ads.

### Which is updated more often, Robot Motion or Sunain?

Robot Motion ships an update monthly, and Sunain every 2 days. Most recently, Robot Motion was updated on October 10, 2026 and Sunain on October 4, 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.*