Last updated 24 August 2026
Email rinnappsupport@gmail.com. It is read by the person who builds Rinn, not a support desk, so replies are personal but not instant.
Rinn is a small project run by one developer. There is no phone line and no live chat.
A useful report saves a round trip:
Rinn stores names typed in by other people so they can split a bill with someone who has no account. You will not have agreed to anything, and you cannot sign in to that record because there is no account attached to it.
Write to rinnappsupport@gmail.com and your name will be removed by hand. Include the name as it would have been typed and, if you know it, who added you — there is no other way to find it.
Removal erases your name and any contact details. The underlying record stays as an unnamed placeholder, because the amounts other people split with you depend on it and deleting it would change what they owe each other. Nothing identifying you remains. The Privacy Policy explains this in full.
Every scanned amount is editable before you save. If a line item or a tax amount comes out wrong, correct it in place — or use “Enter manually instead” and type the expense yourself.
Rinn also checks the receipt’s own arithmetic and tells you where it lands. Two things can go wrong, and they are handled differently:
When everything reconciles, the same panel simply shows the sum closing, so you can see the numbers agree rather than having to check them yourself.
The profile screen has a “Delete all my data” action, which removes the trips and bills only you were in. Anything you share with other people stays, whoever created it — those expenses and balances are their records too. Ask the others to remove theirs, or write to us. See the Privacy Policy.
Rinn records who owes what and can open Venmo, Cash App, Revolut or PayPal with the amount filled in. It does not move money, hold funds, or chase anyone. Marking a payment as paid records that it happened; it does not verify that it did.
Marked a payment by mistake? Settlement payments are append-only: there is no undo, and a recorded payment cannot be deleted from the app. To correct one, record an offsetting payment in the other direction for the same amount — the two cancel out and the balance returns to where it was. Both entries stay in the payment history, which is deliberate: the history is a record of what was claimed, not a tidied-up summary.
On the web, expenses added without a connection are saved on your device and sent when you are back online. A banner shows while you are offline, and pending items are listed until they sync.
On the iPhone app, a receipt you scan and a new expense you save without a connection are kept on the phone and sent the next time you open Rinn with a connection — not in the background, so open the app once you have a signal. Home lists what is waiting, and a new expense shows in its trip with a “Pending” label until it has been sent. Editing an expense and marking a payment as paid still need a connection. A new expense that also creates a bill or adds a person needs one too, because those are made on the server first.
A receipt photo on an expense saved offline is kept on the phone with it and attached when the expense is sent. If the expense is sent but the photo cannot be attached, Home says so and offers to try again.
For a security issue, or anything involving another person's data, email rinnappsupport@gmail.com with “security” in the subject line, and please do not post the details publicly first.