# Smith Performance Center vs Ozlo Sleepbuds

The clearest difference is monetization model: Smith Performance Center at free against Ozlo Sleepbuds's free with in-app purchases. Smith Performance Center also leads on rating (5.0 vs 4.7) and iOS requirement (13.0 vs 18.0). Ozlo Sleepbuds's advantage is ratings volume (2.8K vs 9) and update cadence (weekly vs every 3 weeks). 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.

Smith Performance Center 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 9, so its average is the more settled of the two.

Smith Performance Center ships an update every 3 weeks, Ozlo Sleepbuds weekly. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Smith Performance Center | Ozlo Sleepbuds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/smith-performance-center/id6443876513/reviews)** | [4.7 (2.8K ratings)](https://appshunter.io/ios/app/ozlo-sleepbuds/id6447005546/reviews) |
| Number of ratings | 9 | **2.8K** |
| Positive reviews | — | 44.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 427 MB | 275 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Smith Performance Center LLC](https://appshunter.io/developer/1650194309) | [Drowsy Digital Inc.](https://appshunter.io/developer/1679994355) |

## What reviewers say

### Smith Performance Center

[App page](https://appshunter.io/ios/app/smith-performance-center/id6443876513)

This app offers guided physical therapy and strength training programs to help users manage their health and live an active lifestyle. It provides easy-to-follow workouts, access to coaches for motivation, and injury rehabilitation exercises.

**Highlights:** Easy workout programs on phone, Access training on the go, Coach communication for accountability, Injury rehabilitation exercises, Sync with Apple Health

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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 Smith Performance Center free?

Smith Performance Center 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, Smith Performance Center or Ozlo Sleepbuds?

Smith Performance Center is rated higher. Smith Performance Center averages 5.0 out of 5 from 9 ratings, while Ozlo Sleepbuds averages 4.7 from 2.8K ratings.

### Do Smith Performance Center or Ozlo Sleepbuds have ads?

Neither Smith Performance Center nor Ozlo Sleepbuds shows ads.

### Which is updated more often, Smith Performance Center or Ozlo Sleepbuds?

Smith Performance Center ships an update every 3 weeks, and Ozlo Sleepbuds weekly. Most recently, Smith Performance Center was updated on October 22, 2026 and Ozlo Sleepbuds on October 25, 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.*