Focus Battery vs Calm Rhythm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Focus Battery
Understand your daily focus, mental energy, and peak productivity times. Track how ADHD medications may impact your day and plan your work and breaks around your mind's natural rhythms. Ideal for those with ADHD or seeking to optimize productivity.
- Daily focus forecast
- ADHD medication tracking
- Mental energy monitoring
- Focus metrics and insights
- Deep work session planner
- Journaling and trend analysis
- Focus tests and music
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Focus Battery helps you understand your focus, mental energy, and best times to work. See when your focus is likely to peak, track how ADHD medications may affect your day, and understand your remaining mental energy with Focus Battery. It’s a smarter way to plan work, breaks, and routines around how your mind actually works. Whether you have ADHD, often feel mentally drained, or simply want to understand your productivity better, Focus Battery helps you spot patterns, protect your energy, and make better daily decisions. Key Features: Daily Focus Forecast -See your likely focus pattern across the day and know when you may be at your sharpest. ADHD Medication Tracking - Log your medications and see how they may influence your focus and daily rhythm. Focus Battery - Understand how much focus capacity you have left and how your mental energy changes throughout the day. Focus Metrics - Get a broader view of your focus with supportive metrics that help you understand your mind more clearly. Focus Sessions - Use your best focus windows for deep work, study, or any task that needs sustained attention. Journal & Trends - Track patterns over time and learn what helps you feel clearer, steadier, and more productive. Extra Tools - Explore focus tests, focus music, reports, and more. Focus Battery is built for people who want to stop guessing and start understanding their focus. Subscription Information: Focus Battery includes a short onboarding experience with a simplified focus profile preview. Access to the app and all features described above requires a Focus Battery Pro auto-renewable subscription. Pricing and trial details are shown in the app before purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.focusbattery.pro/privacy.html
Calm Rhythm
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Calm Rhythm is a stress and sleep tracker that turns your Apple Health data into clear, actionable insights. • True stress index – estimated from HRV (heart rate variability) and heart rate, not just mood checkins. • Daily dashboard – see today’s stress level, HRV, heart rate, sleep and steps in one calm home view. • Trends & scores – weekly and monthly stress, recovery, sleep and activity scores so you notice changes early. • Professional insights – simple explanations of HRV, cardiovascular health, sleep and recovery based on your data. • Smart reminders – optional notifications for morning sleep recap, afternoon move reminder and evening winddown. • Biological age (beta) – an estimate based on sleep, HRV, heart rate and activity patterns. Calm Rhythm reads data from Apple Health / HealthKit (HRV, heart rate, sleep, steps) and keeps processing on your device. It is designed for wellness and selfawareness only and does not provide medical diagnosis or treatment. Always consult a doctor for any medical concerns. Terms of Service – StressLife:https://superficial-restaurant-956.notion.site/Terms-of-Service-StressLife-321f52245d5580b094acc9998f1cbec4?source=copy_link Privacy Policy – StressLife:https://superficial-restaurant-956.notion.site/Privacy-Policy-StressLife-321f52245d558070b8c7ece4565c8c5c?source=copy_link
Screenshots
Verdict
The clearest difference is in-app purchases: Calm Rhythm at none against Focus Battery's 2. Focus Battery's advantage is update cadence (every 4 days vs every 3 weeks) and iOS requirement (15.1 vs 17.0). 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. Focus Battery sells 2 in-app purchases, starting at $9.99 per month. Calm Rhythm asks for nothing beyond the download.
Focus Battery ships an update every 4 days, Calm Rhythm every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Focus Battery | Calm Rhythm |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 4 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 96 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Oleksandr Demchenko | 剑炜 陈 |
In-app purchases
Focus Battery
- Focus Battery Pro — Monthly3 Days trial$9.991 Month
- Focus Battery Pro – Annual3 Days trial$49.991 Year
Calm Rhythm
No in-app purchases









