Who processes your data
Every company that touches anything on our behalf, what each one does, and where.
| Company | What they do for us | Where |
|---|---|---|
| Supabase | Account, authentication and synced chart data | European Union (AWS eu-north-1, Stockholm) |
| PowerSync (JourneyApps) | Sync between the app and Supabase | European Union (AWS eu-west-1, Ireland) |
| Sentry | Crash reports | European Union |
| PostHog | Product analytics | European Union (eu.i.posthog.com) |
| Vercel | Hosting and visitor analytics for this website | Global edge network |
| Resend | Account emails and release-note list | European Union |
| Apple | TestFlight beta distribution, and subscription billing after launch | Global |
| Tester sign-up form and Google Play testing, and subscription billing after launch | Global |
What is not on this list
No advertising network, no data broker, no marketing platform, and no analytics beyond the services named above. The list is short because the app does very little that requires a server: charts are calculated on your device, so most of what a comparable product sends away, this one never sends at all.
Transfers
We are established in United States, so data about people in the European Economic Area and the United Kingdom is transferred out of those places to reach us. Those transfers rely on the European Commission’s standard contractual clauses and, for the United Kingdom, the addendum to them. The same clauses cover any processor above that holds data outside the EEA.
Changes
A new processor that handles your data is listed here at least 30 days before it starts. Ask us and we will email you when this list changes. If you have a data processing agreement with us, that notice is a contractual commitment rather than a courtesy.
The app stores
During testing, Apple’s TestFlight and Google Play’s testing tracks hold testers’ names and email addresses, under Apple’s and Google’s own terms. After launch, Apple and Google handle subscription billing and process your payment details under their own terms, not ours — we receive only the fact that a subscription exists and when it expires.