# Aika > Aika ("time" in Finnish) is a free, beautiful, minimalist online timer that chains several timers into one sequence that runs on its own, start to finish or on a loop. Build a sequence once and share it by link, or share a live timer so everyone watching sees the same countdown in real time. Time can display as a shrinking shape instead of numbers — an easier way to see time left for kids or people with ADHD. Aika runs entirely in the browser with fullscreen countdowns and desktop notifications — no signup, no ads, no tracking beyond aggregate analytics. Timers can be configured ad-hoc on the home page, loaded from pre-built presets, or shared via URL. It works as a Pomodoro timer, meeting timer, workout timer, 20-20-20 eye care timer, meditation or breathing timer, stretching timer, cooking timer, study timer, classroom rotation timer, or for any routine that runs in stages. ## Sharing a timer Minimalist timer for countdown sequences you build and share. Send a live link and your whole group follows the same countdown. Free, no sign-up. Use it for a workout with a friend, a class following one screen, group study sprints, or workshop breaks. Unlike a normal timer, everyone shares one clock; unlike a plain countdown, it runs every step on its own. Anyone can share a timer with anyone else via a URL. Two flavours: - **Preset share** — a configurable copy. Recipient can press Start whenever they're ready. - **Live share** — a synced countdown. The URL embeds the sender's start moment as a Unix timestamp, so both sender and recipient see the same remaining time, hitting the end at the same wall-clock moment. ### URL format ``` /share?durations= [&labels=] [&loop=] [&progress=] [&start=] ``` - `durations` — required, comma-separated integer seconds for each timer in the sequence. - `labels` — optional, comma-separated labels matching the durations. Leave a slot empty for no label (`labels=,Focus,`). - `loop` — optional, `true` or `false`. Controls whether the sequence restarts from the beginning when it finishes. - `progress` — optional, `true` to display each timer as a shrinking shape instead of digits while running. - `start` — optional, wall-clock moment (Unix epoch seconds) the sequence started. Presence triggers a live, synced view. ### Examples - `https://aika.app/share?durations=1500,300` — 25-minute work + 5-minute break (Pomodoro preset). - `https://aika.app/share?durations=60,60,60&labels=,Focus,` — three 1-minute timers, middle one labelled "Focus". - `https://aika.app/share?durations=30,15&loop=true` — Tabata-style 30s on / 15s off, looping forever. - `https://aika.app/share?durations=1500&start=1750000000` — a live 25-minute timer anchored to a specific wall-clock moment. Use the canonical preset URLs below when sharing a built-in preset — they're cleaner and carry the preset's identity. ## Presets ### Basic - [1 Minute Timer](https://aika.app/timers/1-minute-timer) - [2 Minute Timer](https://aika.app/timers/2-minute-timer) - [3 Minute Timer](https://aika.app/timers/3-minute-timer) - [5 Minute Timer](https://aika.app/timers/5-minute-timer) - [10 Minute Timer](https://aika.app/timers/10-minute-timer) - [15 Minute Timer](https://aika.app/timers/15-minute-timer) - [20 Minute Timer](https://aika.app/timers/20-minute-timer) - [30 Minute Timer](https://aika.app/timers/30-minute-timer) - [45 Minute Timer](https://aika.app/timers/45-minute-timer) - [1 Hour Timer](https://aika.app/timers/1-hour-timer) ### Productivity - [Pomodoro 25/5 Timer](https://aika.app/timers/pomodoro-25-5) - [Pomodoro 50/10 Timer for Deep Work](https://aika.app/timers/pomodoro-50-10) - [Pomodoro 90/20 Timer (Ultradian Rhythm)](https://aika.app/timers/pomodoro-90-20) - [52/17 Timer for Focus and Recovery](https://aika.app/timers/pomodoro-52-17) - [Animedoro 40/20 Timer](https://aika.app/timers/animedoro) - [ADHD Focus Timer (15/5)](https://aika.app/timers/adhd-focus) - [30-Minute Timeboxed Meeting Timer](https://aika.app/timers/timeboxed-meeting) - [Workshop Break Timer (Share a Live Countdown)](https://aika.app/timers/workshop-break) ### Fitness - [Tabata Timer (8 Rounds of 20/10)](https://aika.app/timers/tabata) - [HIIT 30/30 Timer (10 Rounds)](https://aika.app/timers/hiit-30-30) - [HIIT 40/20 Timer (10 Rounds)](https://aika.app/timers/hiit-40-20) - [EMOM 10 Timer (10 Minutes)](https://aika.app/timers/emom-10) - [Scientific 7-Minute Workout Timer](https://aika.app/timers/7-minute-workout) - [Full-Body Stretching Routine Timer](https://aika.app/timers/full-body-stretch) ### Breathing - [4-7-8 Breathing Timer](https://aika.app/timers/4-7-8-breathing) - [Box Breathing Timer (4-4-4-4)](https://aika.app/timers/box-breathing) ### Wellness - [20-20-20 Eye Rest Timer](https://aika.app/timers/20-20-20) - [Power Nap Timer (20 Minutes)](https://aika.app/timers/power-nap) - [NASA Nap Timer (26 Minutes)](https://aika.app/timers/nasa-nap) - [Contrast Therapy Timer (Sauna & Cold Plunge)](https://aika.app/timers/contrast-therapy) - [Cold Plunge Interval Timer](https://aika.app/timers/cold-plunge) ### Cooking - [White Rice Timer](https://aika.app/timers/white-rice) - [Brown Rice Timer](https://aika.app/timers/brown-rice) - [Soft-Boiled Egg Timer](https://aika.app/timers/soft-boiled-egg) - [Medium Steak Timer](https://aika.app/timers/medium-steak) - [French Press Coffee Timer](https://aika.app/timers/french-press-coffee) - [Pour-Over Coffee Timer (V60)](https://aika.app/timers/pour-over-coffee) ### Classroom - [Classroom Station Rotation Timer](https://aika.app/timers/classroom-stations) ### Kids - [Kids Study Timer (10/5)](https://aika.app/timers/kids-study) - [Brush Teeth Timer (2 Minutes)](https://aika.app/timers/brush-teeth) ## Articles ### Productivity - [The Pomodoro Technique: A Guide to Better Focus & Productivity](https://aika.app/articles/pomodoro-technique) - [The Science of Productivity: How Timers Can Help](https://aika.app/articles/science-of-productivity) - [Timeboxed Meetings: A Science-Backed Way to Boost Productivity](https://aika.app/articles/timed-meetings) - [Ultradian Rhythms and Deep Work: Why 90/20 and 52/17 Beat 25/5](https://aika.app/articles/ultradian-rhythms-and-deep-work) - [Study-Together Timers: The Science of Body Doubling & Focus Rooms](https://aika.app/articles/study-together-timers) - [A Facilitator's Guide to Break Timers for Remote Workshops & Meetings](https://aika.app/articles/facilitators-guide-to-break-timers) - [ADHD Focus Timers and Time Blindness: The Best Settings, Backed by Science](https://aika.app/articles/adhd-focus) ### Kids - [Timed Learning for Kids: A Science-Backed Guide to Better Focus](https://aika.app/articles/timed-learning-for-kids) - [Why Kids Should Brush for Two Minutes (And How to Make Them)](https://aika.app/articles/brush-teeth-two-minutes) - [Classroom Station Rotation Timers: A Teacher’s Guide to Centers & Visual Countdowns](https://aika.app/articles/classroom-station-rotation-timers) ### Wellness - [The 20-20-20 Rule: Science-Backed Tips for Digital Eye Strain](https://aika.app/articles/20-20-20-rule) - [HIIT Timing Explained: Tabata, 30/30, 40/20, and EMOM](https://aika.app/articles/hiit-timing-explained) - [The Scientific 7-Minute Workout: What It Is and How to Time It](https://aika.app/articles/scientific-7-minute-workout) - [Breathwork for Focus and Sleep: Box Breathing vs 4-7-8](https://aika.app/articles/breathwork-for-focus-and-sleep) - [The Science of Napping: Why 20 and 26 Minutes Are the Magic Numbers](https://aika.app/articles/science-of-napping) - [How to Share Workout & Stretching Routines with Clients and Students](https://aika.app/articles/sharing-routines-with-clients-and-students) - [The Full-Body Stretching Routine: What to Stretch and How Long to Hold](https://aika.app/articles/full-body-stretching-routine) - [Contrast Therapy & Cold Plunge Timing: Sauna, Ice, and the Intervals That Work](https://aika.app/articles/contrast-therapy-and-cold-plunge) ### Cooking - [Timed to Perfection: Master the Art of Cooking Rice](https://aika.app/articles/cooking-rice) - [Coffee Timing: French Press vs Pour-Over](https://aika.app/articles/coffee-timing-french-press-vs-pour-over) - [Timed Cooking Beyond Rice: Soft-Boiled Eggs and Steak](https://aika.app/articles/timed-cooking-eggs-and-steak) - [How to Share a Timer with Your Family: A Shared Oven Timer Everyone Can See](https://aika.app/articles/sharing-timers-with-family) ## Key pages - [Home](https://aika.app/) — main timer interface (create your own sequence) - [Presets](https://aika.app/timers) — pre-built timer configurations - [Articles](https://aika.app/articles) — guides on focus, productivity, and timed routines - [Share format](https://aika.app/share) — documentation for shareable URLs