NOTE: This app acts as a Pro license to the free app. You must have Lithium installed in addition to this app and then the Pro features will activate in the free app.
• Sync: Keep your data backed up and in sync across your devices using your Google Drive account. (Books themselves are not currently backed up or synced.)
• Custom themes: Customize your page background color, text color and link colors. Create, delete and edit themes. You can access the custom themes feature by tapping the three-dots under Theme in display settings after upgrading.
• More hightlight colors (see screenshots)
• More features later.