Atomic Focus: One Sentence at a Time
The Sentence Card feature didn't start as a feature. It started as a question: what's the smallest unit of meaning in a book, and what happens if you isolate it completely?
The paragraph is a unit of thought. The sentence is a unit of meaning. And in dense literary fiction or complex nonfiction, a single sentence can carry more weight than an entire chapter of a lesser book.
Atomic Focus mode was built around this observation. When you activate it, the reading experience collapses down to a single sentence — nothing above, nothing below, nothing to the sides. Just that sentence, centered on a card, surrounded by darkness.
What users discover almost immediately is that sentences they would have skimmed in a normal reading environment suddenly demand attention. The ambiguity of a Hemingway line. The precision of a Baldwin clause. You're no longer reading past these moments — you're reading into them.
The swipe gesture to advance feels deliberate in a way that turning a page never does. You're not moving past a sentence. You're granting it permission to be replaced.
We think this is what deep reading is supposed to feel like.