Track daily caffeine from coffee, tea, soda, and energy drinks with half-life visualization.
Caffeine Intake Tracker turns a day's coffee, tea, soda, and energy-drink entries into a running caffeine total and a time-based half-life view. It answers two different questions: how much caffeine was consumed, and how much of that recorded amount may still be present later. The frequent surprise is that the second figure is not the same as the day's total and does not fall to zero when the last drink is finished. It is a modeled remainder, not a measurement of caffeine in the body.
Each coffee, tea, soda, or energy-drink entry contributes a caffeine amount to the day's total. The consumption time anchors that dose on the half-life view. Equal daily totals therefore need not produce equal curves: a later drink leaves more of its modeled caffeine remaining at the same clock time than an earlier drink.
The visualization applies the meaning of a half-life to recorded caffeine: after one half-life, half of a dose remains in the model; after two half-lives, one quarter remains. Drinks consumed at different times begin declining from their respective consumption times, so the view represents overlapping doses rather than treating the entire daily total as one simultaneous intake.
No. The curve is a mathematical estimate based on the half-life represented by the tracker. A person's caffeine clearance can differ, and the display cannot measure blood caffeine, predict an exact sleep response, or establish that no caffeine remains. Use it to compare timing patterns, not as a biological test.
No. It can total the caffeine recorded for the day, which is useful when comparing a log with health guidance. It cannot decide that an amount is safe for a particular person. Product strength, serving size, medications, pregnancy, health conditions, and individual sensitivity can change the practical meaning of the same milligram total.
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