Fithacker vs Mu.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fithacker
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Fithacker helps you get all the exercise your body needs for long-term fitness, strength and mobility.
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 update cadence: Fithacker at every 4 days against Mu.'s every 10 days. Fithacker also leads on iOS requirement (15.1 vs 18.6). 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.
Fithacker ships an update every 4 days, Mu. every 10 days. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.
| Parameter | Fithacker | Mu. |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 33 MB | 34 MB |
| Age rating | 4+ | 12+ |
| Developer | PETER MATTHEW DAVIS | Liminal Pictures |
In-app purchases
Fithacker
No in-app purchases
Mu.
No in-app purchases









