Active caffeine tracker

See what is still active before you pour the next cup.

Brewlytics Pro estimates how much caffeine remains from your logged drinks, then puts that number next to your daily intake and bedtime context.

Download for iPhone

Daily intake and active caffeine answer different questions

Free Brewlytics totals the caffeine you logged today and compares it with your daily limit. That is the simple intake question: how much have I consumed?

Pro adds an active-caffeine estimate that accounts for time since each drink. It is a model, not a measurement, but it helps explain why an earlier coffee can still matter later.

  • Free: today’s total, remaining limit, timeline, and daily-intake widgets.
  • Pro: active caffeine now, decay projections, bedtime estimate, and Pro widgets.

A calmer workflow for the next drink

Log the drink in a couple of taps, check the current estimate, and decide whether another serving fits the context of your day. You can adjust the caffeine amount when the default does not match your cup.

Because the app keeps the log on the iPhone and does not require an account, the workflow stays lightweight for repeat checks.

  • Set a bedtime to see the estimated amount remaining at that time.
  • Use smart alerts in Pro for sleep risk, high active caffeine, or rapid consumption.

Useful context, not a health verdict

Caffeine absorption and sensitivity vary between people. Brewlytics shows the assumptions and estimates you choose so you can notice patterns; it does not diagnose sleep or provide medical advice.

See what is still active before you pour the next cup. product screenshot

Brewlytics FAQ

What is active caffeine?

Active caffeine is Brewlytics’ estimate of caffeine remaining from logged drinks after accounting for elapsed time and your configured half-life.

Is active caffeine included in the free app?

No. Free Brewlytics focuses on daily intake. Active caffeine, decay, and bedtime projections are Pro features.