Keep your tank’s tests, observations and routines together, with private online saving.
Early testing: sign-in email is currently limited to project-approved addresses. Public registration opens after email delivery is configured.
We’ll only open your journal after confirming your account.
Just looking? Try the sample demo · About your data
Your tank records belong to your signed-in account. Sign out when using a shared device.
This permanently removes your tank records from the active database. Export a backup first. Your sign-in account remains available; you can start a new journal.
Permanently remove your sign-in account and its journal. This cannot be undone. Export any records you want to keep first.
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Hold touch / left-click / ↑ / Space to rise · release to dive
Outer bubbles +1 · Gold bullseye +2 × multiplier · Chain perfects
10 perfects → ×2 · 20 → ×3 · 35 → ×5 · 55 → ×10 · 80 → ×25 · 110 → ×50 · 150 → ×100. Gold bullseye: +2 × multiplier for a clean entry and exit. Outer bubbles: +1 flat. Only consecutive perfects build the multiplier; an outer hit or miss resets it to ×1. Cruise pace rises with total points: 50 → ×1.5, 100 → ×2, 500 → ×4 maximum. The pace stays earned when a streak breaks.