Protokl vs Mu.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protokl
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Protokl is not another static workout log or generic calorie counter. It is a bi-directional physiological engine designed to mathematically optimize your body composition and strength progression. By replacing rudimentary step-functions and static algorithms with continuous mathematical curves and variance-adjusted modeling, Protokl adapts to your metabolism and recovery capacity in real-time. Protokl is your all-in-one fitness transformation companion, built on exercise science to help you reach your body composition and strength goals faster. SET YOUR GOALS Choose your path — fat loss, muscle gain, or body recomposition. Protokl builds a personalized plan based on your current stats, experience level, and preferred pace, then projects your timeline using our proprietary algorithm grounded in published physiological research. DAILY PROTOCOL Your personalized daily checklist keeps you accountable. Track sleep, meals, workouts, body composition, steps, and custom tasks — all in one place. Smart reminders keep you on schedule, and tiles auto-complete as you hit your targets. SMART WORKOUTS Recovery-based workout programming that adapts to you. Protokl tracks muscle recovery across 11 muscle groups, selects exercises based on your available equipment, and applies progressive overload automatically. Warm-up sets, supersets, drop sets, and rest timers are built in. NUTRITION TRACKING Log meals from a curated recipe database or search thousands of foods. Protokl calculates your daily calorie and protein targets based on your TDEE, goal, and pace — then tracks your progress throughout the day. BODY COMPOSITION ANALYTICS Track bodyweight, body fat percentage, and lean body mass with interactive charts. See your 2-week trend, plan forecast, confidence intervals, and goal progress. Syncs automatically with Apple Health. STRENGTH TRACKING Monitor your lifts over time with per-exercise history charts, estimated 1RM tracking, and strength progression forecasts. APPLE HEALTH INTEGRATION Seamlessly syncs with Apple Health to import steps, heart rate, sleep, VO2 max, and 60+ other health metrics. Your data stays on your device with automatic iCloud backup. SCIENCE-BACKED PROJECTIONS Our forecast engine synthesizes research on muscle protein synthesis rates, fat oxidation limits, adaptive thermogenesis, and more to project your body composition journey with 90% confidence intervals. PROTOKL PRO SUBSCRIPTION Protokl Pro unlocks the full experience including personalized workout programming, AI-powered nutrition tracking, body composition forecasting, custom workout templates, data export, and priority support. A Protokl Pro subscription is required to access these premium features. • Monthly: $12.99/month • Annual: $119.00/year ($9.92/month) • 14-day free trial included with all plans Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless auto-renewal is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your Account Settings on the App Store after purchase. Any unused portion of a free trial period will be forfeited when you purchase a subscription. Privacy Policy: https://docs-nine-silk.vercel.app/privacy.html Terms of Use: https://docs-nine-silk.vercel.app/terms.html
Mu.
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Mu. Mu. is a daily log for the things that affect how you feel: track mood, symptoms, habits, medications — and let patterns emerge naturally over time. Simple. Modern. Free. Private. —WHAT YOU CAN DO— *Track Events Choose what to track: insomnia, anxiety, stress, medication, or create custom events that matter to you. Log as many or as few as you like. *Log Your Mood Record how you feel on a scale of 0 to 10. *Write Notes Attach a note to any logged event or mood. *Explore Patterns View your data with intuitive charts and statistics. Filter by event type and adjust the time period to see what influences your wellbeing. *Export Your Data Download your history as a CSV or a detailed PDF report — complete with mood charts, color-coded grids, and event heatmaps. Pick the period and the events you want to include. *Apple Watch Companion Log events and your mood directly from your wrist. Data syncs automatically with your iPhone. —SOME WAYS TO USE MU.— • Mood Tracker • Medication Tracker • Pain Tracker • Symptom Journal —PRIVACY FIRST— Your data never leaves your device or iCloud. Without an account or internet connection, Mu. works entirely offline. All your entries—mood scores, events, notes—stay with you. —DESIGNED FOR YOU— Built to be intuitive and calming, by someone who uses it daily. —MEDICAL DISCLAIMER— This app is not a substitute for professional medical advice, diagnosis, or treatment. If you have concerns about your health, please consult a qualified healthcare provider. —LANGUAGES— English, French, Spanish, Arabic —CONTACT & SUPPORT— Questions or feedback? Reach out to us directly from the app's Contact section or via our website, Reddit, Discord or Instagram.
Screenshots
Verdict
The clearest difference is in-app purchases: Mu. at none against Protokl's 2. Protokl's advantage is update cadence (every 3 days vs every 10 days) and iOS requirement (15.1 vs 18.6). On price, ads 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. Protokl sells 2 in-app purchases, starting at $12.99 per month. Mu. asks for nothing beyond the download.
Protokl ships an update every 3 days, Mu. every 10 days. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.
| Parameter | Protokl | Mu. |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 91 MB | 34 MB |
| Age rating | 4+ | 12+ |
| Developer | Ryan Luther | Liminal Pictures |
In-app purchases
Protokl
- Protokl Pro Monthly7 Days trial$12.991 Month
- Protokl Pro Annual7 Days trial$119.001 Year
Mu.
No in-app purchases









