Write to us by email and we will reply as soon as we can. Tell us your iPhone model, the iOS version and what you were doing when the problem happened; a screenshot helps.
Check that both devices use the same iCloud account and that iCloud is turned on for Readaa in iOS Settings. In the app's Settings, a row shows the sync status. On low battery, in Low Power Mode or without a network, iCloud can take a few minutes to deliver changes.
Readaa reads what shows up in the Kindle Notebook of your Amazon account. Open the import again to bring in new highlights. Borrowed books, personal documents and some titles with a publisher copy limit may not appear in the Kindle Notebook, so they don't come along.
Inside each book, export the highlights and notes as Markdown, CSV or JSON.
In Settings, tap Erase all Readaa data. This deletes books, highlights and notes from this device and from your iCloud account, including on other devices with the same account, and can't be undone. Deleting the app alone doesn't delete what is in iCloud.
iPhone, with iOS 26 or later.
More answers in the FAQ and in the guide How Readaa works.
How we handle your data is in the privacy policy and the terms of service.