# UPRIGHT vs Ozlo Sleepbuds

The clearest difference is update cadence: Ozlo Sleepbuds at weekly against UPRIGHT's every 5 weeks. Ozlo Sleepbuds also leads on review sentiment (44% vs 25%). UPRIGHT's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (15.1 vs 18.0). On price, rating, ratings volume 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.

On the App Store both sit at effectively the same score — 4.6 for UPRIGHT against 4.7 for Ozlo Sleepbuds. Both are backed by a comparable volume of ratings — 3.9K and 2.8K respectively. Written reviews are what separate them: 25% of UPRIGHT's written reviews are positive against 44% of Ozlo Sleepbuds's.

UPRIGHT ships an update every 5 weeks, Ozlo Sleepbuds weekly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | UPRIGHT | Ozlo Sleepbuds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (3.9K ratings)](https://appshunter.io/ios/app/upright/id1481438778/reviews) | **[4.7 (2.8K ratings)](https://appshunter.io/ios/app/ozlo-sleepbuds/id6447005546/reviews)** |
| Number of ratings | **3.9K** | 2.8K |
| Positive reviews | 25.4% of reviews | **44.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 90 MB | 275 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Upright Technologies Ltd](https://appshunter.io/developer/1098548242) | [Drowsy Digital Inc.](https://appshunter.io/developer/1679994355) |

## What reviewers say

### UPRIGHT

[App page](https://appshunter.io/ios/app/upright/id1481438778)

This app connects to a wearable device to provide real-time feedback on your posture. It helps you build awareness, strengthen core muscles, and establish good posture habits for improved health and confidence.

**Highlights:** Real-time posture feedback, Personalized daily goals, Posture training tutorial, Progress tracking and stats, Core muscle strengthening, Posture awareness development

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Effective in improving posture
- 🚀 Helpful real-time feedback
- 🚀 Intuitive app and device setup

**What reviewers complain about**

- 🐛 Connectivity issues with the app
- 🔋 High battery drain
- 🐛 Syncing and data tracking issues
- 🐛 Buggy app and software updates

**Reported bugs**

- App freezing and crashing
- Forced firmware updates causing device issues
- Inconsistent device performance and vibration detection

**Requested features**

- Apple Watch app integration
- Customizable goals and settings
- Improved data visualization and tracking


### Ozlo Sleepbuds

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

Tiny, ultra-comfy headphones designed for optimal sleep. They offer all-night battery, noise blocking, audio streaming, and biometric sensing. The companion app allows for personalized settings and sleep data reporting.

**Highlights:** Ultra-comfy, low-profile design, All-night battery life, Noise blocking sleep sounds, Stream any audio content, Personal in-ear alarm, Biometric sleep sensing, Phone-free operation

**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 UPRIGHT free?

UPRIGHT 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, UPRIGHT or Ozlo Sleepbuds?

Ozlo Sleepbuds is rated higher. UPRIGHT averages 4.6 out of 5 from 3.9K ratings, while Ozlo Sleepbuds averages 4.7 from 2.8K ratings.

### Do UPRIGHT or Ozlo Sleepbuds have ads?

Neither UPRIGHT nor Ozlo Sleepbuds shows ads.

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

UPRIGHT ships an update every 5 weeks, and Ozlo Sleepbuds weekly. Most recently, UPRIGHT was updated on October 26, 2026 and Ozlo Sleepbuds on October 27, 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.*