# Coaster Sleep vs Rubjoy

The clearest difference is review sentiment: Rubjoy at 100% against Coaster Sleep's 0%. Rubjoy also leads on rating (5.0 vs 1.0). Coaster Sleep's advantage is update cadence (every 5 weeks vs every 6 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.

Rubjoy holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 0% of Coaster Sleep's written reviews are positive against 100% of Rubjoy's.

Coaster Sleep ships an update every 5 weeks, Rubjoy every 6 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Coaster Sleep | Rubjoy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/coaster-sleep/id1482737289/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rubjoy/id1517267222/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 months |
| Monetization | Free | Free |
| Size | 77 MB | 82 MB |
| Requires iOS | 10.0 | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Qingdao Richmat Intelligence Technology Inc.](https://appshunter.io/developer/1814751082) | [WINKGRIN LLC](https://appshunter.io/developer/1517267221) |

## What reviewers say

### Coaster Sleep

[App page](https://appshunter.io/ios/app/coaster-sleep/id1482737289)

Control dual or single motor devices for beds and sofas. Improve your quality of life with this smart home application.

**Highlights:** Dual motor device control, Single motor device control, Bed application, Sofa application, Smart home integration

**In-app purchases:** none


### Rubjoy

[App page](https://appshunter.io/ios/app/rubjoy/id1517267222)

Control an advanced robotic arm with your smartphone. This app connects via Bluetooth to a micro-controller, allowing you to operate powerful servo motors for complex tasks. It's designed for a serious robotic platform, not a simple toy.

**Highlights:** Bluetooth connectivity, Control servo motors, Advanced robotics, Smartphone interface, Micro-controller integration

**In-app purchases:** none


## Frequently asked questions

### Is Coaster Sleep free?

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

### Is Rubjoy free?

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

### Which has better reviews, Coaster Sleep or Rubjoy?

Rubjoy is rated higher. Coaster Sleep averages 1.0 out of 5 from 2 ratings, while Rubjoy averages 5.0 from 1 ratings.

### Do Coaster Sleep or Rubjoy have ads?

Neither Coaster Sleep nor Rubjoy shows ads.

### Which is updated more often, Coaster Sleep or Rubjoy?

Coaster Sleep ships an update every 5 weeks, and Rubjoy every 6 months. Most recently, Coaster Sleep was updated on October 12, 2026 and Rubjoy on October 7, 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.*