Sleevoo is made by one person. Write to support@sleevoo.app: I answer, usually within two or three days.
If you're writing about a problem, tell me your iPhone model and iOS version — it saves two messages.
Free, you can keep 3 trips, with 6 bookings and 10 expenses each. Attachments, travellers and checklists are never counted. With Sleevoo Full, nothing is counted.
No — you pay once and it stays yours forever, on every device signed in to your Apple ID.
Open Sleevoo, go to Profile and tap "Restore purchases". You need the same Apple ID you bought with.
Trips, documents and photos stay on your iPhone: there is no account and no server of ours. Only place searches and the weather leave the phone, and they go to Apple without saying who you are. The backup is your phone's backup: if you uninstall without one, nobody else has your data.
Yes, if you turn it on for that booking: you choose how long before.