Questions, problems or ideas: noubyte@absan.de. I read every message and usually reply within a few days.
Where are my photos stored?
On your iPhone, and in your own private iCloud if you are signed in. Nobody else can see them. See the privacy policy.
How do I fill in days I missed?
Turn the dial to the day and tap Suggest photos taken on this day. Calendial finds the pictures you took on that date; tap one to add it.
How do I move to a new iPhone?
Sign in with the same Apple Account with iCloud switched on. Your calendar appears once iCloud has synced.
How do I get everything out of the app?
Settings > Print and export > Everything. You get a ZIP with every photo as a JPEG and your text as CSV and JSON.
I bought Calendial Plus but it shows as locked.
Settings > Calendial Plus > Restore Purchase, signed in with the Apple Account you bought it with.
How do I get a refund?
Purchases are handled by Apple. Request a refund at reportaproblem.apple.com.