The short version
Everything you do in Amplifly — brain check-ins, flow and focus sessions, your ND profile, your own tools and insights, the recommendation model — is stored on your device, and every algorithm runs on your device. Amplifly requires an account to use, so that data also syncs to your account: encrypted in transit, stored encrypted at rest on Supabase's servers, and never sold, shared, or used for any purpose other than keeping your data available to you. We collect no analytics, crash reports, or advertising data.
What data Amplifly stores
The following is stored on your device using AsyncStorage, and synced to your account while you are signed in:
- Brain check-ins (brain state + optional note + timestamp) — several per day if you update your state
- Flow and focus sessions (activity, duration, intensity, interest level, helpers, drains, condition used, optional note)
- Your ND profile (which profiles you selected, executive function rating, working memory rating)
- Tools you add yourself and self-insights you record
- Your name (optional, used only for personalized greetings)
- The recommendation engine's learned state (Beta posteriors per condition/context cell) and its outcome history
Your theme and notification preferences are also stored on your device, but they are not synced. Reminders and Focus-timer break alerts are local notifications scheduled by your phone; the app does not register for push notifications.
Local storage is capped so it stays bounded — the most recent 2,000 brain check-ins, 365 flow sessions, 500 recommendation outcomes, 50 self-insights, and 100 custom tools.
Your account
Amplifly requires an account. There is no guest or signed-out mode — when you open the app without an active session, you are taken to the sign-in screen. Signing up takes an email address and a password.
- Your email address is stored by Supabase for authentication. Password resets are handled by emailing you a one-time code.
- Your brain checks, sessions, profile, custom tools, insights, and recommender state are synced to Supabase's servers and stored encrypted at rest.
- Sync runs in the background and never blocks the app. Once you are signed in, Amplifly works offline — an account is required, but a live connection is not.
- Signing out immediately stops syncing. Your local data stays on your device. Signing in again with the same account keeps it; signing in with a different account clears the local data first.
Supabase is an open-source database platform. Their infrastructure is hosted on AWS. You can read Supabase's privacy and security documentation at supabase.com/privacy.
What we do not collect
- No analytics (no Mixpanel, Amplitude, or similar)
- No crash reporting (no Sentry, Bugsnag, or similar)
- No advertising identifiers (no IDFA, GAID)
- No usage telemetry of any kind
- No data is ever sold, shared with advertisers, or used for any purpose other than the functionality described above
The recommendation engine and flow forecast
The recommendation engine is a Thompson-sampling contextual bandit. All computation runs on your device. The model's learned posteriors sync to your account so your learning carries across devices — but nothing is used for advertising or shared with anyone.
The flow forecast uses a small neural network trained on synthetic data built from published research on focus and neurodivergence. The weights are fixed and ship with the app — they never change on your device. The forecast is then calibrated against the flow sessions you have logged; that calibration is computed on the spot, not stored.
Amplifly Lite, the version of Amplifly on the App Store today, uses no sensors, wearables, or biometric data. Everything it reasons about comes from what you tell it and what the phone already knows.
The BioProxal wearable (in development)
An optional BioProxal wearable integration is being built and is not part of the App Store release. As currently built, the wearable computes its readings on the device itself and sends only finished values — a flow score, heart rate, HRV, SpO2, and breathing rate — to the app over Bluetooth while the app is open. The app never receives raw sensor signals.
This policy describes the App Store release only. Before a wearable-enabled version is released, it will be updated to describe what the app stores, syncs, and does with the wearable's numbers, and the date at the top of this page will change.
Deleting your data
To delete your account and all data stored in Supabase, email us at hello@amplifly.me with the subject "Delete my account." We will remove all rows associated with your user ID and delete your Supabase auth account within 7 days.
To delete data stored locally on your device, uninstall the app. All AsyncStorage data is removed automatically when the app is uninstalled. Uninstalling does not delete your account or the data synced to it — email us to do that.
Children
Amplifly is not directed at children under 13. We do not knowingly collect personal information from children under 13.
Changes to this policy
If we make material changes to this policy, we will update the date at the top of this page.
Contact
Questions about privacy? Email hello@amplifly.me.