Support

We're happy to help. The fastest way to reach us is by email.

When reporting a bug, please include:

• Your Android version and device model
• The Chronosync Plus version (Settings → About)
• What you were trying to do, what happened, what you expected
• A screenshot if the issue is visual

Frequently asked questions

I forgot my password. How do I recover my data?

You can't — and that's by design. Your data is encrypted on-device with a key derived from your password. We never see your password and there is no server-side recovery. If you forget it, use Settings → Reset all data to start fresh. If you previously exported a backup (Settings → Export), you can import it with the original password.

Why does the app need my location?

Chronosync Plus computes solar times (sunrise, sunset, solar noon, the vitamin-D window) from your latitude and longitude. Without location, we can't tell you when the sun is up where you are. Your coordinates are sent only to Open-Meteo (for UV and cloud cover) and optionally to OpenStreetMap Nominatim (to reverse-geocode into a place name). No coordinates are ever stored on a server we control, because we don't run one.

Why does the app ask for Usage Access?

Focus mode needs to know which app is currently in the foreground so it can block you from opening the ones on your blocklist during deep-work windows. The observation stays in RAM and is discarded when you stop a session. No per-app history is stored or transmitted.

Why is camera permission requested?

The Lux Meter uses the camera's live preview to estimate ambient brightness when your device lacks a hardware ambient-light sensor. No frames are recorded, saved, or transmitted. The camera is only active while the Lux Meter screen is visible.

Does the blue-light overlay capture what's on my screen?

No. The overlay is flagged FLAG_NOT_TOUCHABLE and FLAG_NOT_FOCUSABLE, which means it can tint pixels but cannot read them or capture any input. It is purely a colored surface drawn above other apps.

Are vitamin-D and burn-time estimates accurate?

They're approximations built from published models — SunCalc for solar elevation, the Fitzpatrick MED table for skin erythema thresholds, standard altitude and cloud-cover adjustments. Real exposure depends on surfaces, clothing fit, sunscreen adherence, and individual skin chemistry we can't measure. Treat outputs as rough guidance, not clinical readings.

How do I delete all my data?

Open Settings → Reset all data, or uninstall the app. Full instructions are on the Data deletion page.

Is Chronosync Plus open source?

The repository is hosted on GitHub. See github.com/royalowetop/chronosyncplus.

Is Chronosync Plus available on iPhone?

The Android app is our current release target. iOS support is on the roadmap — the codebase uses Capacitor, which can produce an iOS build, but we haven't polished the iOS experience yet.