# Function Health vs Death Clock

Function Health and Death Clock both sit at 4.9 stars, but that hides the real split: 62% of Function Health's written reviews are positive against 24% of Death Clock's. Function Health also leads on in-app purchases (none vs 10). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Death Clock sells 10 in-app purchases, starting at $9.99 per month. Function Health asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Function Health against 4.8 for Death Clock. Both are backed by a comparable volume of ratings — 25K and 18K respectively. Written reviews are what separate them: 62% of Function Health's written reviews are positive against 24% of Death Clock's.

Function Health ships an update weekly, Death Clock every 5 days. Both last shipped on November 9, 2026.

## The numbers

| Metric | Function Health | Death Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (25K ratings)](https://appshunter.io/ios/app/function-health/id6471280307/reviews)** | [4.8 (18K ratings)](https://appshunter.io/ios/app/death-clock-the-life-lab/id6499554412/reviews) |
| Number of ratings | **25K** | 18K |
| Positive reviews | **61.5% of reviews** | 23.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 206 MB | 138 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Function Health](https://appshunter.io/developer/1715014524) | [Most Days](https://appshunter.io/developer/1531169667) |

## What reviewers say

### Function Health

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

Gain deep insights into your health with over 160 lab tests annually, personalized protocols, and AI-powered chat. Understand your body's evolution, track progress, and make informed changes with advanced science and your data.

**Highlights:** 160+ annual lab tests, Personalized health protocols, AI-powered private chat, Home or office blood draws, Advanced MRI & CT scans, Connect wearables, 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


### Death Clock

[App page](https://appshunter.io/ios/app/death-clock-the-life-lab/id6499554412)

This AI-powered health app analyzes your data to predict your lifespan and provide a personalized plan for a longer, healthier life. It offers guidance on diet, exercise, and screenings, with an AI health concierge to interpret results and track progress.

**Highlights:** AI-driven lifespan prediction, Personalized health and longevity plans, AI health concierge, Bloodwork analysis and interpretation, Habit and progress tracking, Integration with Apple Health and wearables

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Death Clock AI Membership | $9.99 | per month |
| Death Clock Membership | $39.99 | per year |
| Death Clock AI Membership | $39.99 | per year |
| $49/yr Digital Only | $49.99 | per year |
| Death Clock Membership | $59.99 | per year |
| Death Clock Digital Membership | $69.99 | per year |
| Death Clock AI Membership | $69.99 | per year |
| Death Clock Membership | $79.99 | per year |
| $99 Baseline, 3-Day Trial | $99.99 | per year |
| Death Clock Membership | $99.99 | per year |

**What reviewers like**

- 💡 Interesting and amusing experience
- 👍 Clean, smooth interface
- 👍 Provides immediate results
- 👍 Free to use without account

**What reviewers complain about**

- 🐛 Buggy, with issues like freezing and crashing
- 💰 Misleading about subscription fees and trial periods
- 🤔 Inaccurate or irrelevant recommendations
- 🤔 Doesn't account for important health factors

**Reported bugs**

- Unable to create an account or progress past the first name screen
- Subscription charges despite canceling trial period
- Incompatible with certain devices or OS versions

**Requested features**

- Allow users to update their profile and recalculate lifespan
- Provide more detailed and personalized health recommendations
- Improve transparency around data usage and privacy
- Add gamification elements to encourage healthy lifestyle changes


## Frequently asked questions

### Is Function Health free?

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

### Is Death Clock free?

Death Clock is free to download, with in-app purchases available.

### Which has better reviews, Function Health or Death Clock?

Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Death Clock averages 4.8 from 18K ratings.

### Do Function Health or Death Clock have ads?

Neither Function Health nor Death Clock shows ads.

### Which is updated more often, Function Health or Death Clock?

Function Health ships an update weekly, and Death Clock every 5 days. Most recently, Function Health was updated on November 9, 2026 and Death Clock on November 9, 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.*