Support
Something not working?
Mail appfeedback@davidmohl.com. It reaches David, who makes the app. Before you write, the fixes below cover most of what comes in.
Common problems
"Masked Email Scope: Disabled"
The token was created without the Masked Email scope. Scopes cannot be added afterwards, so delete it in Fastmail and create a new one with that scope ticked.
The list is empty
If you have never used Masked Email before, there is nothing to show. Create one and it will appear. If you know you have addresses, pull down to refresh, and check that the token belongs to the Fastmail account holding them.
Creating an address fails
On the free tier, creation stops after 10 addresses. Beyond that, the usual cause is a revoked or expired token: open Settings and check whether authentication still reads as connected.
The purchase did not carry to another device
Make sure both devices use the same Apple Account, then use Restore Purchases in Settings. If it still does not appear, mail the address above with the Apple Account region you bought from.
Reporting a bug
The app version from Settings, your device and OS, what you expected, and any error text word for word. That usually turns two rounds of mail into one.
Never send your API token. Nothing that can be diagnosed needs it, and anyone asking you for one is not doing support.
Refunds
In-app purchases are handled by Apple, so refunds go through reportaproblem.apple.com rather than through this app.