# Rubjoy vs Ozlo Sleepbuds

The clearest difference is review sentiment: Rubjoy at 100% against Ozlo Sleepbuds's 44%. Rubjoy also leads on rating (5.0 vs 4.7) and iOS requirement (10.0 vs 18.0). Ozlo Sleepbuds's advantage is update cadence (weekly vs every 6 months) and ratings volume (2.8K vs 3). On price, ads, in-app purchases and monetization model 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 4.7. That said, the two scores are not equally well evidenced: Ozlo Sleepbuds has 2.8K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Rubjoy's written reviews are positive against 44% of Ozlo Sleepbuds's.

Rubjoy ships an update every 6 months, Ozlo Sleepbuds weekly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Rubjoy | Ozlo Sleepbuds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rubjoy/id1517267222/reviews)** | [4.7 (2.8K ratings)](https://appshunter.io/ios/app/ozlo-sleepbuds/id6447005546/reviews) |
| Number of ratings | 3 | **2.8K** |
| Positive reviews | **100.0% of reviews** | 44.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | Free |
| Size | 82 MB | 275 MB |
| Requires iOS | **10.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [WINKGRIN LLC](https://appshunter.io/developer/1517267221) | [Drowsy Digital Inc.](https://appshunter.io/developer/1679994355) |

## What reviewers say

### 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


### Ozlo Sleepbuds

[App page](https://appshunter.io/ios/app/ozlo-sleepbuds/id6447005546)

Tiny, comfortable earbuds designed for sleep. They offer all-night battery, noise blocking, and audio streaming. The companion app personalizes settings and provides sleep data reports.

**Highlights:** Ultra-comfy, low-profile design, All-night battery life (up to 14 hours), Noise blocking for disruptive sounds, Bluetooth audio streaming, Personal in-ear alarm, Sleep modes and timer, Sleep pattern and environmental insights

**Features:** iPhone Duo support

**In-app purchases:** none

**What reviewers like**

- 💤 Comfortable for side sleeping
- 🌙 Helps with sleep and tinnitus
- 🔕 Blocks out noise like snoring
- 🕰️ Alarm wakes user without disturbing partner
- 🔊 Good sound quality and variety of sleep sounds

**What reviewers complain about**

- 🔌 Battery life issues, drains quickly
- 📶 Bluetooth connectivity problems, frequent disconnections
- 🤖 Glitchy app with stability and UX problems
- 🔊 Limited volume control and sound options
- ⚠️ Mandatory updates cause disruptions

**Reported bugs**

- Earbuds not charging properly in case
- Sync issues between left and right earbuds
- App fails to connect or update firmware
- Sleep timer function is not working as expected

**Requested features**

- Allow custom sleep sounds and playlists
- Add phone-free mode to use without app
- Improve alarm features to work with phone alarms
- Expand sound library with more options like nature sounds


## Frequently asked questions

### Is Rubjoy free?

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

### Is Ozlo Sleepbuds free?

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

### Which has better reviews, Rubjoy or Ozlo Sleepbuds?

Rubjoy is rated higher. Rubjoy averages 5.0 out of 5 from 3 ratings, while Ozlo Sleepbuds averages 4.7 from 2.8K ratings.

### Do Rubjoy or Ozlo Sleepbuds have ads?

Neither Rubjoy nor Ozlo Sleepbuds shows ads.

### Which is updated more often, Rubjoy or Ozlo Sleepbuds?

Rubjoy ships an update every 6 months, and Ozlo Sleepbuds weekly. Most recently, Rubjoy was updated on November 3, 2026 and Ozlo Sleepbuds on November 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.*