Jitterlog: Caffeine Tracker

Jitterlog is a caffeine log for iPhone. Tap once for every coffee, tea or energy drink, set a daily limit, and watch a neon HUD heat up as you get close to it. CORE Today's count on glowing seven-segment digits, next to a steaming cup that fills towards the brim as you near your limit. The steam and glow follow your intake level: STANDBY, NOMINAL, ELEVATED, then OVERCLOCKED once you're past your limit. A haptic marks every cup, and a warning one tells you when you've gone over. LOG FROM ANYWHERE • Home Screen widget with a + ONE MORE button, so you never open the app • Lock Screen widgets: a gauge, a line or a summary • A One More Cup control for Control Center, the Lock Screen and the Action button • Siri and Shortcuts: "Log a cup in Jitterlog", "How many cups today in Jitterlog" EVERY DAY ON RECORD Your whole history, newest first and grouped by month. Swipe a day to add or remove a cup, or tap it to edit. Missed a day? Fill it in, up to ten years back. TELEMETRY Total cups, active days, daily average, peak day, and your current and best streak. A 30-day chart against your limit (drag across it to read any day), and this week day by day. YOUR LIMIT, YOUR RULES Pick a daily limit from 2 to 32 cups. The meter, the levels and the charts all scale to it. PRIVATE BY DESIGN No account, no ads, no tracking. Jitterlog collects no data: your history stays on your iPhone. Jitterlog counts cups. It isn't a medical app and doesn't give health advice.