On your iPhone, using Apple's SwiftData framework. If you turn on iCloud sync in Settings, your data also syncs to your own iCloud account using CloudKit private database with end-to-end encryption. We — the developer — never see your data.
How do I cancel my subscription?
Open iOS Settings → tap your Apple ID at the top → Subscriptions → RelationOS Pro → Cancel Subscription. Cancellation takes effect at the end of your current billing period; you keep Pro features until then.
How do I delete all my data?
In RelationOS, go to Settings → Privacy → Delete all data → confirm. Your contacts, notes, reminders, and (if enabled) iCloud-synced data are wiped. The app returns to a fresh-install state.
**How much does RelationOS Pro cost?**
$11.99 per month or $89.99 per year (about 37% off vs. monthly).
**Is there a free trial?**
Yes. New subscribers get a 2-week free trial on either monthly or annual. No credit card required beyond Apple's standard. Cancel before the trial ends and you won't be charged.
**Can I cancel anytime?**
Yes. Open iOS Settings → Apple ID → Subscriptions and turn off RelationOS Pro. The current billing period continues; no further charges after that.
**What happens to my data if I cancel?**
Nothing changes. Your contacts, notes, and reminders stay on your phone. You return to the free tier (limit: 100 contacts) but no data is lost.
**Where is my data stored?**
On your iPhone. Optionally in your own iCloud (encrypted). Never on RelationOS servers — we don't run any.