Support

For help with any app, send an email.

Contact

Include the app name, your device (for example, iPhone 17), and what you expected to happen. A screenshot helps.

How do I move from another checkbook app?: Export a file from the old app, or take screenshots of its register. Then open an account in Register Book, tap “…” and choose “Bring Your Checkbook Over”. Move to Register Book, step by step
Does Register Book connect to my bank?: No. It never asks for your bank login. You enter each transaction yourself.
Do I need to create an account?: No. There is no sign-up. Sync between your own devices uses your iCloud.
Where is my data stored?: On your device and, if you use iCloud, in your own iCloud account. XD3V cannot see it.
How do I back up or move my register?: The app saves a daily backup file on your device. You can also export a backup, or export an account as a CSV or QIF file.

When can I get Sidecast?: Sidecast is in a private build. It is coming to the App Store for iPhone.