This is the support page for the iOS app "Crux". If the FAQ below doesn't solve your problem, feel free to get in touch.
The most reliable way to reach us is the in-app form at Settings → Feedback (your app version and device information are attached automatically, which makes investigation much faster). You can also email info@learnsynclab.app. We reply as soon as we can.
Q. Crux Lock doesn't work
Screen Time permission is required the first time. Allow Crux in iOS Settings → Screen Time, then turn on the app's Settings → Timer → Crux Lock again. The lock is active only while the timer is running.
Q. Apps I need are blocked during the timer
Crux Lock blocks every app except the ones you choose. In Settings → Timer → Crux Lock, use "Allowed apps" to pick the apps you want to keep using one by one. Due to an iOS limitation, whole categories cannot be allowed at once.
Q. How do I cancel my subscription?
You can cancel from your device's Settings → Apple Account → Subscriptions. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period.
Q. I lost Pro after switching devices
Open the app's Settings → Crux Pro and use the restore button on that screen. You need to be signed in with the same Apple Account you purchased with.
Q. How do I delete my account or data?
In the app's Settings → Account actions, you can delete all study data or delete your account. Neither can be undone.
Q. The lock-screen timer (Live Activity) doesn't appear
In iOS Settings → Crux, allow Notifications and Live Activities.
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