Available now
Android
Install DeltaScroll from Google Play and keep your library, progress, and reading tools with you.
Get it on Google Play
DeltaScroll
About
Your books. Your device.
DeltaScroll is a free ebook reader for the web, Android, and Windows. You can read, organise, and make notes without creating an account. Your books and reading progress stay mainly on your device.
Private by defaultWeb, Android, and WindowsiOS is coming soon
Choose your platform
Read on the platform you use.
DeltaScroll is available on the web, Android, and Windows. Each version is built around local reading, portable backups, and control over your own files. An iOS version is coming soon.
Available now
Windows
Use the dedicated Windows app for local reading, library management, backups, and desktop controls.
Download for WindowsAvailable now
Web
Open DeltaScroll in a modern browser. Imported books and reading data remain available on your device.
Open the web appComing soon
iOS
An iPhone and iPad version is planned, with simple book imports and support for Apple's accessibility tools.
Your library is yours
Your books and reading progress stay mainly on your device.
Useful offline
Once a book is imported, you can keep reading without an internet connection.
Portable by design
Create a backup file whenever you want a copy of your books and reading progress.
Designed around reading
Reading tools without the clutter.
DeltaScroll keeps the page calm and puts useful controls close by. You choose how the book looks, what you save, and when anything leaves your device.
Read comfortably
A page that adapts to you
Change the text size, spacing, theme, and page style until the book feels comfortable to read.
Work with the text
Mark, find, and listen
Search the book, highlight passages, add bookmarks and notes, look up words offline, or listen to the text aloud.
Bring your own books
Your files are welcome
Import EPUB files, or turn PDF and DOCX files into readable books on your device. You can also save a backup of your library and progress.
Read offline
Web, Android, and Windows
Use DeltaScroll in a modern browser, on Android, or in the Windows app. Once a book is on your device, you can keep reading without an internet connection.
Development priorities
What we are working on
- 1Keep the reader, library, and backups reliable.
- 2Make text, navigation, audio, and notes work better for more readers.
- 3Keep EPUB, PDF, DOCX, backups, the web, Android, and Windows working well together.
- 4Maintain the web, Android, and Windows apps while preparing iOS, keeping your books private and under your control.
Support the work
Support helps us keep DeltaScroll reliable and make it better.
Browser and Android updates can change how books, storage, and accessibility features work. Support gives us more time to test those changes and fix problems before they interrupt your reading.
Reliability
Keep the foundation dependable
Books, browsers, and devices keep changing. Support helps us keep reading, search, notes, backups, and audio working well.
Access
Improve reading for more people
Support gives us more time to improve accessibility, book conversion, dictionaries, navigation, and reading controls while keeping the reader free.
Reach
Prepare for more platforms
Maintaining the web, Android, and Windows versions while preparing iOS will take more devices, testing, design work, and ongoing care.
Questions
Straight answers about the reader.
What is DeltaScroll?
DeltaScroll (also written Delta Scroll) is an ebook reader for the web, Android and Windows. It opens EPUB, PDF and DOCX books, reads them aloud, and keeps your library on your own device.
Is DeltaScroll a scroll saw or a woodworking tool?
No. DeltaScroll is reading software: an app for ebooks, documents and classic books. It has nothing to do with saws or woodworking.
Is DeltaScroll free?
Yes. DeltaScroll is free to use on the web, Android and Windows, with no ads and no account. Donations are optional.
Which file formats does DeltaScroll support?
EPUB books open directly. PDF and DOCX files are converted into reflowing books with chapters, on your device, so nothing is uploaded.
Does DeltaScroll work offline?
Yes. Once a book is in your library you can read it, search it and highlight it without a connection.
Does DeltaScroll work on Android and Windows?
Yes. DeltaScroll for Android is on Google Play, DeltaScroll for Windows is a free download, and the web reader runs in any modern browser.
Can DeltaScroll read a book aloud?
Yes. Read-aloud uses natural voices, highlights each sentence as it is spoken, and lets you choose the speed.
Where do I find free ebooks?
Inside DeltaScroll. Free books brings new Standard Ebooks releases every week and more than 70,000 public-domain books from Project Gutenberg.
Does DeltaScroll keep my data private?
Yes. Your books, notes and reading progress stay on your device. DeltaScroll has no account system and does not sell personal information. Google Drive backup is optional.
Keep exploring
Read a book, test the tools, and decide for yourself.
Start in the library, work through the reader guide, or install the Android app or Windows app. If DeltaScroll is useful to you, your support helps us keep improving it for everyone.