ProAct vs Moss
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ProAct
This app uses biometric data and machine learning to predict migraine attacks up to 48 hours in advance. It tracks symptoms, identifies triggers, and offers personalized relief methods. Data is kept private and secure on your device.
- Migraine attack prediction up to 48 hours in advance
- Biometric analysis (HRV, sleep, resting heart rate)
- Comprehensive attack tracking (intensity, duration, symptoms, triggers)
- AI-powered pattern discovery for personalized insights
- Personalized relief protocols and trigger identification
- Privacy-first design with on-device data storage
- HealthKit integration
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Pro-Act reads your Apple Watch and iPhone biometrics and surfaces migraine patterns up to 48 hours ahead. Raw health data stays on your phone. No account required. WHAT PRO-ACT DOES EARLY SIGNALS Continuous analysis of HRV, sleep quality, resting heart rate, and barometric pressure, grounded in published migraine research. When the patterns match your migraine history, you get an early heads-up -- often 24-48 hours ahead. TRACKING WHEN IT HITS Fast logging during an active attack. Record intensity, duration, symptoms, and triggers. The more you log, the sharper your pattern picture gets. PATTERN DISCOVERY After enough data, Pro-Act surfaces what's actually behind your attacks. Weather. Sleep. Specific HRV signatures. The patterns that have been hiding in your data the whole time. 5-4-3-2-1 GROUNDING ROUTINE When risk spikes, Pro-Act guides you through a five-step grounding routine. Specific, named, behavioral. Something to do, not something to feel. PRIVACY-FOCUSED BY DESIGN Raw biometric data stays on your device. On supported iPhones, risk analysis runs fully on-device with Apple Intelligence; otherwise an aggregated summary -- never raw health samples -- is sent securely for analysis. No account required. WORKS WITHOUT BIOMETRICS TOO Prefer not to share HealthKit data? Pro-Act provides insights through manual tracking alone. Log your attacks and discover patterns in your migraine history. SUBSCRIPTION INFORMATION New subscribers get a free 7-day trial. Subscriptions auto-renew unless canceled 24+ hours before the period ends. Manage subscriptions in iTunes Account Settings. The free trial converts to a paid subscription unless canceled before it ends. SUPPORT & PRIVACY Privacy Policy: https://proactmigraine.com/privacy Terms of Use: https://proactmigraine.com/terms Support: support@proactmigraine.com Free 7-day trial. Cancel anytime.
Moss
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There's a kind of meditation app that wants to be part of your life. Moss just wants to get out of the way. Pick a duration. Choose an ambient sound, or silence. Begin. Everything else (session log, streaks, mindful minutes) stays quietly on your device, private and unhurried. Now on Apple Watch, too. Start a session right from your wrist, pick your own duration, and it logs back to your phone automatically. After a session, if you want, leave a quick note on how you felt. Entirely optional, and easy to turn off if it's not for you. No guilt if you miss a day. No badge pressure. Just a still place to return to whenever you're ready to breathe. Moss is for people who already know why they want to meditate. It just makes it easier.
Screenshots
Verdict
The clearest difference is in-app purchases: Moss at none against ProAct's 2. Moss also leads on ads (none vs shown) and device support (3 vs 1). ProAct's advantage is update cadence (every 5 days vs monthly). On price and iOS requirement 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. ProAct sells 2 in-app purchases, starting at $9.99 per month. Moss asks for nothing beyond the download.
ProAct ships an update every 5 days, Moss monthly. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.
| Parameter | ProAct | Moss |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 5 days — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 69 MB | 18 MB |
| Age rating | 17+ | 4+ |
| Developer | Coleton Gorecke | Quiet Leaf LLC |
In-app purchases
ProAct
- ProAct Premium7 Days trial$9.991 Month
- ProAct Premium7 Days trial$89.991 Year
Moss
No in-app purchases









