Divetally — Dive Log Book

Every dive you ever do, written the way the paper book writes it — private, on your device, no account, no subscription.

Divetally is a log book, and it is only a log book. It does not track you, does not want your email, does not lock your history behind a renewal. You log the dive: where, when, how deep, how long, with whom, on what gas. Everything else is optional — the paper book never refused an entry for having gaps, and neither does this one.

THE DIAL
Your lifetime figures — dives, bottom time, deepest — live on a drawn instrument bezel, computed from your log and never stored. The amber needle sweeps as the book grows. Log one dive and it comes alive.

THE DEPTH STRIP
Every entry carries a one-line profile of the dive: out, down, along, up. Read a season of diving at a glance.

THE REGISTERS
Certification cards, equipment with serials and service notes, the people you dive with — kept the way the paper book keeps them, one tap from the log.

FIGURES, COMPUTED
Totals by year, mean depth, coldest water. Surface air consumption where a dive earned the figure — never estimated. Nothing is stored twice; strike a dive and the book renumbers itself, the way the paper book always did.

YOUR DATA IS YOURS
The loudest card in Settings is Data & Backup. JSON and CSV export, both ways, free forever — a backup that has never been written is a hope, not a backup. Bring a whole history across from your dive computer's own files (Subsurface XML, UDDF, CSV) with Pro.

PRO — ONE PAYMENT, FOREVER
Pro is a single purchase, not a subscription: universal imports, a print-ready PDF log book, and gas analysis. The free app keeps every dive readable forever, with or without Pro. That is the whole design.

Works fully offline — on the boat, at the quarry, on a liveaboard. No ads, no analytics, no account.

Divetally is a record. It is not a dive computer or a planner, and its figures are never safety guidance. Dive within your training.

Loadcircle Ltd — England and Wales.