Read for rhythm and context
Read the full passage out loud so the words, transitions, and shape of the passage become familiar.
Long passage memorization
Memorize scripture, poems, speeches, scripts, and more by reading the full passage, listening back for flow, and practicing recall one line at a time.
Currently available for iPhone only.



Designed for attention
Each passage has three working modes. Read builds familiarity with the whole text, Listen reinforces phrasing and transitions, and Practice turns recognition into recall.
Read the full passage out loud so the words, transitions, and shape of the passage become familiar.
Record and replay the passage on your device to absorb phrasing, cadence, and flow between lines.
Recite one line from memory, check yourself, and let progressive hiding adjust as each line gets stronger.
How it works
One Line is not just a flashcard list. It keeps you connected to the full passage while giving each line the focused repetition it needs.
Read the full passage out loud to build rhythm, context, and comfort with the material before narrowing in on individual lines.
When a new line appears, read it out loud, recite it from memory, and peek when needed so it has a strong first memory.
Tap Yes when you know a line and No when you need help. The app hides or reveals more next time and adds new lines as older ones become solid.
Subscriptions
One Line includes a free plan for getting started. One Line Pro gives you more room for saved passages across your account and may include additional Pro features as they are added. Purchases and subscription management are handled through the App Store.
One Line is only available for iPhone right now. Android and web apps are not available yet.