# SleepStream 2 Ultimate vs Function Health

The clearest difference is price: Function Health at Free against SleepStream 2 Ultimate's $9.99. Function Health also leads on rating (4.9 vs 4.5) and update cadence (weekly vs every 2 months). SleepStream 2 Ultimate's advantage is review sentiment (81% vs 62%) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Function Health is free to download; SleepStream 2 Ultimate costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Function Health holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 188, so its average is the more settled of the two. Written reviews complicate that: 81% of SleepStream 2 Ultimate's written reviews are positive against 62% of Function Health's, so the app with the better star average is not the one people write more warmly about.

SleepStream 2 Ultimate ships an update every 2 months, Function Health weekly. The most recent releases landed on October 17, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | SleepStream 2 Ultimate | Function Health |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.5 (188 ratings)](https://appshunter.io/ios/app/sleepstream-2-ultimate/id535583437/reviews) | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** |
| Number of ratings | 188 | **25K** |
| Positive reviews | **81.3% of reviews** | 61.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Paid** | Subscription |
| Best chart rank | — | **#205** |
| Size | 32 MB | 203 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Explosive Apps](https://appshunter.io/developer/300812186) | [Function Health](https://appshunter.io/developer/1715014524) |

## What reviewers say

### SleepStream 2 Ultimate

[App page](https://appshunter.io/ios/app/sleepstream-2-ultimate/id535583437)

This app provides a comprehensive suite of tools to enhance sleep and relaxation. It offers a variety of calming sounds, guided meditations, and visual experiences designed to help users unwind and achieve restful sleep.

**Highlights:** Quality audio with calming sounds, Guided meditations and music, Breathtaking visualizations and moodlights, Binaural & Isochronic brainwave programs, Unique audio engine for sound mixing, AirPlay support

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

**In-app purchases:** none

**What reviewers like**

- 👍 Helps with sleep, relaxation, and focus
- 🚀 Customizable sound options
- 💡 Variety of binaural beats and overlays
- 👍 Useful for meditation and anxiety reduction
- 👍 Helps with tinnitus and headaches

**What reviewers complain about**

- 🐛 Crashes when trying to download additional content
- 🔍 App not updated in years, feels outdated
- 💰 Expensive for an app that hasn't been updated
- 🔍 Scaling issues on iPad Pro
- 🔍 Difficulty navigating and selecting options

**Reported bugs**

- Crashes when trying to download additional content
- Scaling issues on iPad Pro
- Difficulty navigating and selecting options

**Requested features**

- Longer timer options (up to 8 hours)
- Sleep analysis and tracking features
- More guided meditations and new sound content
- Ability to import custom music/sounds
- Airplay and Bluetooth speaker support


### Function Health

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

**Currently charting:** #205 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 SleepStream 2 Ultimate free?

SleepStream 2 Ultimate costs $9.99, with no in-app purchases.

### Is Function Health free?

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

### Which has better reviews, SleepStream 2 Ultimate or Function Health?

Function Health is rated higher. SleepStream 2 Ultimate averages 4.5 out of 5 from 188 ratings, while Function Health averages 4.9 from 25K ratings.

### Do SleepStream 2 Ultimate or Function Health have ads?

Neither SleepStream 2 Ultimate nor Function Health shows ads.

### Which is updated more often, SleepStream 2 Ultimate or Function Health?

SleepStream 2 Ultimate ships an update every 2 months, and Function Health weekly. Most recently, SleepStream 2 Ultimate was updated on October 17, 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.*