Use the one that works for you, or switch between them. Every reading aid can be turned on or off.
Bolds the first 35–40% of each word, so your eyes have a clear place to land on every word.
Keeps your current line sharp and softly blurs the lines around it, so you don’t jump to the wrong line.
Gives each line its own colored stripe, so the next line is always easy to find.
Shows one word at a time in the same spot, so your eyes don’t have to travel along the line.
Charcoal, Bedtime, Reader’s (e-ink style), Cream, Sepia and Calm Green.
Listen while each word is highlighted as it is read aloud.
DRM-free EPUB, PDF, Word (DOCX) and text files, plus clean text from web articles.
Public-domain classics, ready to download inside the app.
Look up words without the internet.
Shake your phone to jot down a stray thought, then get back to reading.
Simple explanations, key takeaways and flashcards, using your own Google Gemini API key. readHD works fully without it.
Your files and progress stay on your device.
Download readHD on iPhone, iPad or Android. Upgrade only if you love it.
