🏷️ Discount Calculator

Calculate exact age and day difference from birth date with timezone aware handling.

Flip a coin online with 3D animation, multi-coin mode, decision helper, and session statistics — powered by cryptographic randomness.

Unified countdown timer and stopwatch with up to 10 concurrent timer cards, natural-language input, serialized alarm queue, local restore, cross-tab sync, voice announcements, custom preset editor (drag-reorder, color-coded, shareable link), 15 ready presets (Pomodoro, Tabata, egg, ramen, meditation, meeting), multi-step engine, Web Audio bells, Wake Lock, fullscreen big display, and shareable URL. Timers run in the current browser with no login required and do not rely on a LittleOne Tools timer backend.

Calculate date differences, date offsets, business-day offsets, and lookup ISO week, quarter, leap year, lunar, zodiac, and solar-term details.

Find the day number for any date, reverse-lookup a day number to its date, and view a full year calendar table with progress bar, ISO week, and quarter info.