ZenTimer vs Migraine Sentry
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZenTimer
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Taking a moment to close your eyes in the midst of a busy day. Meditation provides a valuable space to clear an information-overloaded mind and regain inner peace. ZenTimer is an incredibly simple meditation app designed to seamlessly integrate that quiet time into your daily life. Start by setting a target time, but there is no pressure to strictly stick to it. Finish early if you are satisfied, or keep going if it feels right. Meditating in pure silence is meaningful enough on its own. However, on days when it feels "too noisy in your head," try turning on the ambient sound. We provide a unique meditation soundscape centered on the 528Hz Solfeggio frequency, fusing singing bowl harmonics, ambient drones, and the breath of nature. Blending scientifically-guided Theta wave induction with traditional harmonic therapy, it is more than just background music—it is a "space" to align your consciousness. Distractions fade away with the sound’s fade-in, and a pleasant silence settles into your body with the fade-out. ■ Sound Features ・528Hz Solfeggio Frequency (including harmonic series) ・Tibetan Bowl Harmonics (1 / 2.756 / 5.404 ratio) ・Space Ambient Pad (Am harmonic chord structure) ・Binaural Beats θ wave 6Hz (when using headphones) ・Brown Noise ambient style Find your calm, starting from just one minute a day. Change the quality of your day with quiet time spent simply counting.
Migraine Sentry
This app forecasts migraine vulnerability by analyzing your personal health data, weather patterns, and environmental factors. It provides daily and weekly outlooks, identifies potential triggers, and offers insights into effective treatments. Log migraines easily and receive a clinical report for your doctor.
- Personal migraine vulnerability forecast
- Seven-day outlook (weather, pressure, patterns)
- Passive health data analysis (sleep, HRV, etc.)
- Personal trigger rankings
- Plain-language explanation of changes
- Fast logging with Live Activity
- Clinical PDF report for doctors
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Know before the pain, without logging everything. Most migraine trackers ask you to record everything. Migraine Sentry works differently. It uses Apple Watch, Apple Health and weather data to build a picture of your personal baseline. Your devices collect the signals. You log the migraine. Migraine Sentry connects the two. Once your baseline is ready, each morning brings a simple Low, Moderate or Elevated vulnerability forecast. Look seven days ahead for pressure-related and cycle-related risk. As your history grows, Migraine Sentry explains what changed before your attacks, ranks the signals most closely linked to them and shows which treatments appear to work best for you. WHAT YOU GET • A personal migraine vulnerability forecast each morning • A seven-day outlook based on weather, pressure and your own patterns • Passive analysis of sleep, HRV, resting heart rate, activity, wrist temperature and more, where available • Personal trigger rankings based on attacks and normal days • Plain-language explanations of what differed from your baseline • Fast logging from iPhone or Apple Watch, with an active migraine shown through a Live Activity on your Lock Screen • Optional check-ins for stress, hydration, caffeine, alcohol and skipped meals • Cycle awareness for cycle-related patterns, if you choose • A clear clinical PDF for your doctor or neurologist HOW IT LEARNS Log a migraine and Migraine Sentry captures the surrounding context. After several attacks, it begins surfacing emerging patterns. With more history, it becomes better able to distinguish signals that appear before your migraines from signals that are also common on normal days. NO APPLE WATCH? You can still use migraine logging, iPhone pressure readings, weather, check-ins, history and reports. Compatible wearables that write sleep and heart-rate data to Apple Health can provide additional signals. PRIVATE BY DESIGN Raw Apple Health readings are processed on your iPhone and never sent to our servers. Migraine entries and settings can back up through your private iCloud account. Migraine Sentry does not operate a migraine-data server. FREE AND PREMIUM Migraine logging, history, check-ins, your daily forecast level and the core clinical report are free. Migraine Sentry Premium adds the reasons behind your forecast, live signal nudges, detailed seven-day outlook information, personal trigger rankings, pattern and treatment insights, and expanded report analysis. Every new user receives a 21-day full-access Premium Preview once their forecast is ready. The preview does not start a subscription or renew automatically. Premium is an auto-renewing subscription with a 21-day full-access preview for every new user. Payment is charged to your Apple Account at purchase confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings. Migraine Sentry is not a medical device. It does not diagnose, treat, or prevent any condition. Forecasts and insights are informational only. Always consult your healthcare provider about your migraines. Privacy Policy: https://migrainesentry.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: ZenTimer at none against Migraine Sentry's 2. Migraine Sentry's advantage is iOS requirement (17.0 vs 26.2). 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. Migraine Sentry sells 2 in-app purchases, starting at $4.99 per month. ZenTimer asks for nothing beyond the download.
| Parameter | ZenTimer | Migraine Sentry |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | — | Every 3 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 26.2 | 17.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 16 MB |
| Age rating | 4+ | 12+ |
| Developer | takeshi kato | KJC International Limited |
In-app purchases
ZenTimer
No in-app purchases
Migraine Sentry
- Premium Monthly$4.991 Month
- Premium Annual$29.991 Year









