I would love to show you Caffeine Clock 2.0, a tracker I made that shows you your caffeine levels now and in the future, helping you have undisrupted sleep by timing your caffeine better.

A bit of context - as a guy who drinks a lot of caffeine, I wanted to make a good caffeine tracking app for a long time, since nothing I found at the time was sufficient. I wanted to make an app that would be easy to use, show you exactly when you’d have enough caffeine to not have your sleep disrupted, and could add all the drinks I usually drink, for free.

After several iterations, I am now releasing the second major version of Caffeine Clock, which is the caffeine tracking app I always wanted to build.

Some highlights:

Accurate caffeine algorithm — able to take the absorption rate and a “sipping” duration into account to actually give you a realistic estimate

Fully offline — the data is only on your phone. No login, nothing. You can move the data from phone to phone

Comprehensive onboarding, which (at least I hope) asks relevant questions supported by studies — those will set your caffeine half-life and sleep-safe threshold

Over 200 drinks in the database — or create your own as well Analytics — including average caffeine consumption, a streak of days where your caffeine amount was good at your bedtime, drinks breakdown, etc.

Localized into five languages (some of them AI-translated; please help me if you find something weird)

Free - It is supported by ads, and there is an option to support the app and remove them.

I would love to hear your feedback. Please, check it out for yourself and let me know what you think!