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Productivity & everyday calculators

Productivity & everyday calculators

Pomodoro timer, sleep cycles, tip and loan calculators, date math — focus and finance helpers.

Open Productivity Studio

Productivity Studio keeps daily math and focus rituals in one tab: 25/5 Pomodoro sessions, sleep window planning, tip splits and compound interest without app installs.

Key terms

Pomodoro 25/5 timer
Sleep cycle calculator
Tip & tax calculators
Compound interest
Date difference

How it works

Open Pomodoro Timer
Start 25-minute focus block
Take 5-minute break alert
Repeat cycles

Tool guides

Pomodoro Timer — 25 minute focus
Sleep Cycle Calculator online — free
Tip Calculator — split bill and tip percent
Compound Interest Calculator online — free
Date Difference — days between dates

Related collections

Free developer tools online
Productivity timers — Pomodoro and focus sessions
Free online calculators — finance, date and unit

Frequently asked questions

Notifications without install?

Browser tab alerts work when the tab stays open.

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