Long text on a phone screen is easy to get lost in: your eyes slip to the next line, skip a row, or come back to a sentence you already read. Many people with dyslexia or ADHD use a ruler or a card under the line when reading on paper. On a phone, a reading ruler does the same job on screen.
Start with your display settings
Android's accessibility and display settings — larger font size, bold text, dark theme — can make text easier to read. They don't, however, mark the line you are on, which is what helps when your eyes keep wandering.
Add a reading ruler with ReadFocus+
ReadFocus+ (our app) floats a focus strip on top of any app — ebooks, PDFs, browsers, news, webtoons. Choose Line Highlight to light up the line you are reading, or Reading Mask to dim everything except your reading zone.
- Install ReadFocus+ from Google Play and allow "Display over other apps".
- Pick a mode: Line Highlight (a reading ruler) or Reading Mask.
- Open the app you're reading in and drag the strip to your line.
- Adjust its height (50–300 dp), opacity and color theme until it feels comfortable.
Free and Pro
The free version gives 60 minutes of overlay time per session and 3 color themes. Pro removes ads and the time limit and adds all 10 themes and keep-screen-on, or a short ad unlocks Pro features for 24 hours.
