support
Help with membership, backups and moving to a new phone.
restore purchases
In phenyl, open You and tap Restore purchases (it is also on the membership screen). Use the same Apple ID you bought with.
manage or cancel
Membership belongs to your Apple ID. On your iPhone, open Settings, tap your name, then Subscriptions, and choose phenyl. Cancelling never deletes or hides your formulas: you keep the free tier, and everything you made stays openable and editable.
back up and a new phone
Your library lives on your iPhone. Open You and tap Back up library, then save the file to Files, iCloud Drive or another service you trust. On a new phone, install phenyl, open You, tap Restore library and choose that file. Then Restore purchases to bring membership across.
deleting your data
Deleting phenyl from your iPhone removes everything it stored. Cancel the Apple membership separately in Settings.
contact
For anything else, write to phenylapp@gmail.com.