Comparison

Function Health vs RoundTimer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Function Health

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
Read full description

Function membership helps you take control of your health with 160+ lab tests each year, personalized Protocols, and Private AI Chat—all backed by advanced science and your real data. Built with top doctors, Function gives you the power to understand your body, track how it evolves, and make meaningful change. NOW AVAILABLE: HOME OR OFFICE BLOOD DRAWS Schedule a concierge blood draw at your home or office. A licensed specialist comes to you and completes your blood draw in under 20 minutes. Available in select locations. 160+ LAB TESTS Membership includes testing for your heart, hormones, thyroid, liver, kidneys, toxins, nutrients, inflammation, autoimmunity, immunity and more. ADVANCED MRI & CT SCANS Detect early signs of cancer and hundreds of other potential conditions with the option to purchase advanced imaging for your brain, pancreas, liver, spine, ovaries, prostate, heart and much more. PRIVATE AI CHAT Ask questions about your results, identify meaningful patterns, and figure out where to focus next, with Private AI Chat—built in partnership with top clinicians. CONNECT WEARABLES Connect Apple Health and other health devices and wearables to see how your activity, sleep, and daily habits affect your lab test results and long-term health. PROTOCOLS Translate your lab results, scans and health history into clear, evidence-based plans for nutrition, activity, and supplements—all customizable to your goals and preferences. UPLOAD HEALTH RECORDS Upload past lab test results, scans, and other medical records for a more complete view of your health, all in one secure place. PROGRESS YOU CAN SEE Twice-yearly and On-Demand testing helps you track your results over time, monitor for early signs of disease, and identify where to focus next. ADVANCED LAB TESTS Membership includes 160+ lab tests, plus the option to purchase advanced On-Demand tests for: - Detection of 50+ cancers - Alzheimer’s risk detection - MTHFR gene variants - Advanced MRI and CT scans starting at $365 - Food allergies and sensitivities - …and much more ACCESSIBILITY What could cost as much as $15,000 on your own is included with membership for just $365/year. Lab testing is available at over 2,000 lab locations across the US, with no insurance needed. SECURITY Function was built for privacy and security. Function is built to HIPAA standards. Your information is secure. How it works: 1. Join Function and schedule your first set of lab tests. 2. Get your results and personalized Protocols. Ask questions with your Private AI Chat. 3. See your progress with 60+ lab tests at your Mid-Year Test. 4. Purchase MRI or CT scans and other advanced On-Demand Tests any time. DISCLAIMER Function Health is a technology company and not a laboratory or medical provider. All laboratory and medical services are provided by independent third parties. Function Health does not offer medical advice, laboratory services, a diagnosis, medical treatment, or any form of a medical opinion; its services are not a substitute for medical care, medical advice, and/or a detailed discussion with a physician or other licensed provider. If you have any questions regarding any laboratory results or any other information that you access through Function Health, you should contact a physician or other licensed provider. All material, information, data, and content that Function Health provides is strictly for general information purposes. For additional important information: https:// www.functionhealth.com/terms-of-service.

About

RoundTimer

Features
Read full description

The interval timer that works the way your workout does. RoundTimer is a premium interval timer built for athletes who train with Tabata, boxing rounds, EMOM, AMRAP, and custom circuits. One price, no ads, no subscriptions - ever. TIMER SOUNDS PLAY OVER YOUR MUSIC The #1 complaint about other timer apps? They pause your Spotify. RoundTimer plays workout sounds alongside your music, never interrupting it. BEAUTIFUL TIMER SCREEN - Circular progress ring with phase-colored glow - "Next phase" preview so you always know what's coming - Half-time alerts to keep you on track - Countdown beeps in the final 3 seconds BUILT-IN PRESETS + CUSTOM BUILDER - Tabata (20s/10s x 8 rounds) - Boxing (3min/1min x 12 rounds) - EMOM & AMRAP templates - Create unlimited custom timers with work, rest, warmup & cooldown TRACK YOUR PROGRESS - Workout history with date, duration, and rounds - Weekly activity summary with day streak - Celebrate completions with animated stats QUICK START Set work, rest & rounds - start a timer instantly without saving a preset. SHARE YOUR WORKOUTS Share preset configurations or completed workout stats with your training partners. LIVE ACTIVITY See your timer countdown on the lock screen while your phone is locked. No accounts. No data collection. No network requests. Just the best interval timer on iPhone.

Screenshots

Function Health4 screens
RoundTimer4 screens

Verdict

The call

The clearest difference is price: Function Health at Free against RoundTimer's $4.99. Function Health also leads on update cadence (weekly vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Function Health is free to download; RoundTimer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Function Health ships an update weekly, RoundTimer every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Function Health versus RoundTimer: the parameters behind the verdict, then further details
ParameterFunction HealthRoundTimer
PriceFree — better$4.99
Rating4.9 (25K ratings) — better—
Positive reviews61.8% of reviews—
Number of ratings25K — better—
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationSubscription—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.4 — better17.0
Further details — not scored
Size203 MB2 MB
Age rating17+4+
DeveloperFunction HealthTal Shtark

Bugs and requests

Function Health

Reported bugs

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

Requested features

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

RoundTimer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Function Health

No in-app purchases

None

RoundTimer

No in-app purchases

Questions

Is Function Health free?
Function Health is free to download, with no in-app purchases.
Is RoundTimer free?
RoundTimer costs $4.99, with no in-app purchases.
Do Function Health or RoundTimer have ads?
Neither Function Health nor RoundTimer shows ads.
Which is updated more often, Function Health or RoundTimer?
Function Health ships an update weekly, and RoundTimer every 2 months. Most recently, Function Health was updated on October 29, 2026 and RoundTimer on October 24, 2026.

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