Resync

Plan sleep, light and optional reminders around your flights.

Privacy Policy

Your trips and schedule are computed locally and are never uploaded to our servers. Purchases require communication with Apple and RevenueCat.

Notifications: Resync schedules local sleep, light and optional caffeine reminders. Melatonin reminders are off by default and require you to enable them. Reminders are generated and delivered on your device.
Your trips & plan: flight times, time zones, and your plan are stored on your iPhone. Your active plan is shared with your paired Apple Watch through Apple frameworks.
No location or health data: Resync does not track your location and does not read Apple Health data.

Purchases

We do not receive your trip or sleep content. There is no advertising or cross-app tracking. Apple processes purchases. RevenueCat receives an anonymous app user ID and purchase history to manage access and provide purchase analytics. It does not receive your itinerary or sleep schedule.

Children

This app is not directed at children under 13 and does not knowingly collect data from them.

Terms of Use

By downloading or using Resync, you agree to Apple's Standard End User License Agreement (EULA), available at apple.com/legal/internet-services/itunes/dev/stdeula, together with the terms below.

Subscriptions & purchases

First plan: free on this installation, including return flights when included in the trip. Deleting the trip does not reset the free plan.
Individual plans: $9.99 USD per trip. Each purchase unlocks one saved trip, including its return journey. It does not auto-renew. You can buy another plan for a later trip.
Annual: $24.99 USD per year for unlimited plans while subscribed.

Prices are shown in the app and may vary by region. Apple charges your account when you confirm a purchase. Annual subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Apple charges for renewal within 24 hours before that period ends. Manage or cancel your subscription in App Store account settings; cancellation takes effect at the end of the current billing period.

Restoring purchases and saved plans

Restore Purchases restores annual access. Individual plans and their purchase records stay on this device. They cannot be recreated after app data is erased or restored on another device. Legacy one-time purchases remain associated with their original saved trip.

If a purchase is interrupted, use Retry recovery in Flights or contact support before buying again. The app keeps the purchase linked to its original trip until recovery completes. After a refund, previously generated guidance remains readable, but the refunded purchase no longer permits activating or regenerating that trip.

Disclaimer

Resync provides jet-lag and circadian guidance for general informational purposes and is not medical advice. Consult a qualified professional before using melatonin or making changes that affect your health or sleep. Plans are estimates and do not guarantee prevention of jet lag. No melatonin dosing advice is provided. The app is provided "as is," without warranties of any kind; to the extent permitted by law, we are not liable for any damages arising from your use of it.

Support

Questions, bug reports, or feature requests: nlambson@gmail.com. We aim to respond within a few business days.

Last updated: September 29, 2026.