The Anime Lad
Yukiteru records daily life on his phone and keeps people at a safe observational distance. Then his diary begins displaying events before they occur, which would be helpful if other diary holders were not involved. Each device predicts a different slice of the future. The series treats personal journaling as tactical equipment, a reasonable outcome for excessive screen time.
Super Eyepatch Fox
Yukiteru's phone starts reporting the future. Eleven other people hold predictive diaries with different features, and all are pulled into the same survival contest. Information can provide defense or become dangerous bait. Nobody sees everything, so reading another participant matters as much as reading the screen.
Gigguku
The premise is gloriously direct: give twelve people incompatible windows into tomorrow and let every prediction create fresh panic! Yukiteru wants to observe life from the edges, but his phone makes that impossible. Each diary offers a different advantage, so every screen update can redraw the immediate danger. Checking a notification has never felt this much like opening a trapdoor.
Father's Basement
Its early violence can be gaudy, and the emotional volume rarely respects indoor settings. Still, the diary design is stronger than the spectacle. Each device has different predictive features. Those limits force users to read each other rather than trust omniscience. Yukiteru's passivity adds pressure because information keeps demanding choices he would rather avoid.
