About this app
Keep your place on screen, line after line. Overdys brings classic paper reading aids to your screen — the reading ruler and the guide line used in classrooms — plus a customizable full-screen color filter. THREE MODES - Ruler: a reading window that highlights the line you're reading and masks the rest of the screen — keep your place and stay focused - Line: a horizontal guide that follows your reading position - Overlay: a full-screen color filter with adjustable tint and intensity, for your visual comfort — like adjusting your screen's tint Customizable shortcuts let you switch modes or toggle the aid instantly. Reading rulers and guide lines are inspired by tools long used in classrooms to help readers keep their place. Every reader is different: pick the mode that feels right for you. Overdys is a comfort and accessibility tool. It does not diagnose or treat dyslexia or attention disorders. Your feedback is valuable and helps improve the product.
Latest release
What’s New
Minor improvements. Updated App Store description.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 14, 2026 · 6:15 PM $9.99
Screenshots
