Immortals Bryan Johnson vs Behavioral Experiment
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Immortals Bryan Johnson
This app helps you create a personalized longevity plan based on your health data and research. Connect wearables, upload biomarkers, and receive insights to optimize your well-being. It's free and adapts to your unique biology.
- Personalized longevity protocol
- Connects to multiple wearables
- Uploads health biomarkers and labs
- AI-driven health insights
- Expert-designed algorithm
- Interactive Q&A with BryanAI
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Immortals is a free app* that helps you build a personalized longevity protocol. It’s backed by Bryan Johnson’s 5+ years of longevity research and informed by your health data** START FOR FREE + Connect any wearable: Apple Watch, Eight Sleep, Fitbit, Garmin, Google Fit, Oura, and Whoop + Upload existing biomarkers or labs from any provider + Get insights that adapt to your inputs HOW IT WORKS BryanAI reads your data, cross-references it against Bryan's protocol and population-level research, and helps you focus on the most impactful things you can do for your health. It's free and adapts to your biology. No clinician visit required to start. BRYANAI Bryan Johnson's team of longevity experts built an algorithm to run his body. It reads his data and tells him how to build his protocol based on how his body responds. BryanAI gives everyone access to that same framework. You can ask BryanAI questions like: "What's driving my HRV drop?" "Am I getting enough protein for my training load?" "Should I train cardio today?" BryanAI is continuously reviewed and refined by leading AI experts in longevity, nutrition, exercise, and sleep. DESIGNED BY LONGEVITY EXPERTS Carl Seger, M.D. Board-Certified Physician specializing in preventive and longevity medicine. IMMORTALS SUPPORT: support@immortals.com *This App is not a Medical Device **Not intended to diagnose, treat, cure, or prevent any disease. For informational purposes only. Does not constitute medical advice, treatment, or a diagnosis.
Behavioral Experiment
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Anxious thoughts make confident predictions. I will freeze. They will notice. I won’t cope. Behavioral Experiment gives you a way to check a prediction like that against what really happens, instead of taking the thought’s word for it. It’s for anyone working on anxiety, worry, or avoidance, on your own or with a therapist. Behavioral experiments are one of the core methods of cognitive behavioral therapy, and the app guides you through one in four steps. You start by writing the worry as a belief and rating how true it feels. Then you plan a test. You pick a situation that would put the belief to the test, say what you expect to happen in terms you could see or count, and decide which safety behaviors to leave out, the small precautions that feel helpful but keep you from finding out. A plan can have a date and time, or it can wait until the situation comes up. While it’s happening, one screen holds your plan, your prediction, and the safety behaviors you’re leaving out, with room for a few notes that carry into the review. Afterward you record what happened, see it next to what you predicted, and rate the belief again. If you write down a next step, Plan this turns it into the next experiment. When something feels too big to attempt, build a step ladder. Break the goal into rungs rated for expected distress, plan any rung as its own experiment, and move up when a rung feels solid enough. Nine short articles with references explain the ideas behind the method, from how anxiety works and the cycle of avoidance to safety behaviors, predictions, and ladders. Each step has plain guidance and a finished example you can open and read. If you see a therapist, flag experiments to talk about and share a session summary as a PDF, or copy any belief or experiment as text. Reminders are optional and say only that it’s time, or that it’s coming up and when, unless you choose to show your plan in them. On iOS 18 and later, add Record an experiment to Control Center to write down something that just happened while it’s fresh. Free, with no ads, no accounts, and no tracking. Everything you write stays on your device. Turn on iCloud sync to see it on your other devices, lock the app with Face ID, Touch ID, or your passcode, and delete everything whenever you like. Nothing is ever sent to us. In English and Spanish, with ratings from 0 to 100 or 0 to 10. Behavioral Experiment is a guided worksheet with educational articles. It is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. It is not therapy or medical care, it is not for emergencies, and using it does not create a professional relationship with us. For medical advice, diagnosis, or treatment, talk with a healthcare professional. If you work with a therapist, plan experiments with them. You decide whether to do any experiment, and you do it at your own risk.
Screenshots
Verdict
The clearest difference is update cadence: Immortals Bryan Johnson at every 5 days against Behavioral Experiment's every 3 weeks. Immortals Bryan Johnson also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Immortals Bryan Johnson ships an update every 5 days, Behavioral Experiment every 3 weeks. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.
| Parameter | Immortals Bryan Johnson | Behavioral Experiment |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (24 ratings) — better | — |
| Positive reviews | 16.7% of reviews | — |
| Number of ratings | 24 — better | — |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 95 MB | 7 MB |
| Age rating | 17+ | 12+ |
| Developer | Blueprint Bryan Johnson | Everyday Insight LLC |
In-app purchases
Immortals Bryan Johnson
No in-app purchases
Behavioral Experiment
No in-app purchases
Questions
Is Immortals Bryan Johnson free?
Is Behavioral Experiment free?
Do Immortals Bryan Johnson or Behavioral Experiment have ads?
Which is updated more often, Immortals Bryan Johnson or Behavioral Experiment?
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