Log what you drink.
Keep your coffee, tea, and other drinks together. See an estimate of how much caffeine is still active.
← Back to Work
A little clarity
OnsetCaffeine tracker for iPhone
A little clarity
before another cup.
Log your drinks, estimate caffeine at bedtime, and preview another cup before you decide.
Free on the App Store. Your history stays on your iPhone.
An October 13 development preview with demo drinks. The app has changed since these screens were captured.
how onset works
From your first cup
to bedtime.
Check another cup.
Preview what a drink could add now and at bedtime, before you choose to log it.
Find your patterns.
Look back at what you drank and when, and see how your evenings compare.
take a closer look
Inside the app.
SCREENSHOTS
An October 13 development preview with demo drinks. The app has changed since these screens were captured.
Read the Onset walkthrough →
a little less to worry about
Your history.
Your iPhone.
Your caffeine history stays on your device. Optional Apple Health access is read-only.
Read Onset’s privacy policy →a note from the maker
Built and maintained
by Inder.
I make Onset and handle its updates and support myself.
Questions or an idea? Say hello → Read the Onset case study → See what else I’m making →before your next cup
Give Onset a try.
Get Onset freeFor iPhone. Here if you need a hand.