Interval Timer vs Mu.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Interval Timer
This app provides a highly customizable interval timer for various workout types, including HIIT, Tabata, and circuit training. It offers clear audio cues, background operation, and workout history tracking to help users structure their exercise sessions effectively.
- Customizable interval timers
- Full-screen color-coded display
- Audio cues and alerts
- Background operation
- Workout history and statistics
- Pre-set templates for routines
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The ultimate interval timer for HIIT, Tabata, Circuit Training, MMA, boxing, strength workouts, cardio sessions, stretching routines, and more. Designed to be simple, powerful, and reliable—whether you’re training at home, at the gym, or outdoors. Create fully customizable timers, stay focused with clear audio cues, and keep your workouts running smoothly in the background. Perfect for athletes, trainers, and anyone who wants a seamless way to structure work and rest periods. FEATURES: - Full-screen, color-coded display for easy visibility from any distance. - Templates for HIIT, Tabata, Circuit Training and other routines. - Combine multiple interval timers for complete workout control. - Voice cues and alerts that speak interval names. - Runs in the background while you use other apps or lock your device. - Playlist and music support during your workout. - Save your custom timers as reusable templates. - Continue listening to audio guides even when the app is minimized. CUSTOMIZABLE OPTIONS: - Number of sets - Work time and rest time - High and low intensity intervals - Warm-up and cool-down durations - Pause during rest - Auto-lock control - Timer sounds and volume - Rounds, cycles, and repeat counts - First interval selection (high or low) - New set sound or vibration alerts WORKOUT HISTORY & TRACKING: Automatically save your completed workouts. View detailed statistics and progress history. Repeat previous workouts without reconfiguring anything. SUBSCRIPTIONS & IN-APP PURCHASES: The app offers optional in-app purchases and subscription plans that unlock premium features and advanced customization options. Payment is charged to your Apple ID account at the time of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current billing period. Your account will be charged for renewal within 24 hours before the current period ends. You can manage or cancel your subscription at any time from your App Store account settings. Any unused portion of a free trial will be forfeited once a subscription is purchased. Privacy Policy: https://intervally-app.web.app/privacy.html Terms of Use: https://intervally-app.web.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 Interval Timer's 5. On price, update cadence, 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. Interval Timer sells 5 in-app purchases, starting at $1.99 per month. Mu. asks for nothing beyond the download.
Interval Timer ships an update every 9 days, Mu. every 10 days. The most recent releases landed on September 24, 2026 and October 2, 2026 respectively.
| Parameter | Interval Timer | Mu. |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 9 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, Apple Watch | iPhone, iPad, Apple Watch — better |
| Requires iOS | 17.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 59 MB | 34 MB |
| Age rating | 4+ | 12+ |
| Developer | AVA Consult | Liminal Pictures |
In-app purchases
Interval Timer
- Pro Access - Monthly$1.991 Month
- Pro Access - Monthly3 Days trial$1.991 Month
- Pro Access - Yearly$9.991 Year
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- Pro Access - Yearly3 Days trial$9.991 Year
- Pro Access - Lifetime$19.99
Mu.
No in-app purchases









