Reporting a problem
To help us fix things quickly, please include:
- the app version (shown in Settings) and your Windows version;
- the format of the file and, if you can, the file itself;
- what you did, what you expected, and what happened instead.
Before you write
- Update. Install the latest UniReader from the Microsoft Store; many problems are already fixed.
- One file, then another. If a document misbehaves, try another file of the same type: it tells us whether the file or the app is at fault.
- Purchases. Billing is handled by the Microsoft Store. If a purchase isn’t recognized, reopen the app so it checks your license again.
- EPUB, MOBI, CHM or LIT won’t open? These formats use Microsoft’s WebView2, built into Windows 11. On Windows 10, install the free WebView2 Runtime from Microsoft, then reopen the book.
Learn the app
Every function has a tooltip, and the welcome screen walks you through your first library. If something is unclear, tell us: it helps us improve the app.
Your privacy
UniReader is a local-first reader: your files, highlights and notes stay on your PC. Read the privacy statement.