# Ozlo Sleepbuds vs Function Health

The clearest difference is monetization model: Ozlo Sleepbuds at free with in-app purchases against Function Health's subscription. Function Health's advantage is review sentiment (62% vs 44%) and rating (4.9 vs 4.7). On price, update cadence, 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.

Function Health holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 2.7K, so its average is the more settled of the two. Written reviews point the same way: 44% of Ozlo Sleepbuds's written reviews are positive against 62% of Function Health's.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 19, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Ozlo Sleepbuds | Function Health |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (2.7K ratings)](https://appshunter.io/ios/app/ozlo-sleepbuds/id6447005546/reviews) | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** |
| Number of ratings | 2.7K | **25K** |
| Positive reviews | 44.1% of reviews | **61.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | **Free with in-app purchases** | Subscription |
| Best chart rank | — | **#193** |
| Size | 268 MB | 203 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Drowsy Digital Inc.](https://appshunter.io/developer/1679994355) | [Function Health](https://appshunter.io/developer/1715014524) |

## What reviewers say

### 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


### Function Health

[App page](https://appshunter.io/ios/app/function-health/id6471280307)

**Currently charting:** #193 Top Free · Health & Fitness (US App Store)

Take control of your health with comprehensive lab testing, personalized protocols, and AI-powered insights. Understand your body's data, track changes over time, and make informed decisions for long-term wellness. Connect wearables and upload records for a complete health picture.

**Highlights:** 160+ lab tests annually, Personalized health protocols, Private AI Chat for results, Connect health wearables, Advanced MRI & CT scans, Upload health records

**Features:** Apple Wallet

**In-app purchases:** none

**What reviewers like**

- 🚀 Seamless process for blood tests and results
- 📊 Comprehensive health insights and tracking
- 🧠 Helpful clinician notes and recommendations
- 👍 User-friendly and visually appealing app
- 💰 Affordable compared to other options

**What reviewers complain about**

- 🔍 Lack of communication and support responsiveness
- 🐛 Some bugs and usability issues in the app

**Reported bugs**

- App sometimes redirects back to the home screen when trying to view results
- Occasional typos and formatting issues in the app

**Requested features**

- More customization options in the app settings
- Ability to print or export test results and recommendations
- Specific supplement recommendations rather than broad suggestions


## Frequently asked questions

### Is Ozlo Sleepbuds free?

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

### Is Function Health free?

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

### Which has better reviews, Ozlo Sleepbuds or Function Health?

Function Health is rated higher. Ozlo Sleepbuds averages 4.7 out of 5 from 2.7K ratings, while Function Health averages 4.9 from 25K ratings.

### Do Ozlo Sleepbuds or Function Health have ads?

Neither Ozlo Sleepbuds nor Function Health shows ads.

### Which is updated more often, Ozlo Sleepbuds or Function Health?

Ozlo Sleepbuds ships an update weekly, and Function Health weekly. Most recently, Ozlo Sleepbuds was updated on October 19, 2026 and Function Health on October 20, 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.*