HALFLIFE: Quit Caffeine

You tried to quit caffeine cold turkey. By day two, the headache was unbearable, you couldn't focus at work, and you caved. You're not weak -- you're experiencing a medically recognized withdrawal syndrome (DSM-5 code 292.0). And the cold-turkey approach is the reason 80% of people fail.

HALFLIFE is the first app that treats caffeine like what it is: a psychoactive drug with a 5-6 hour half-life, predictable withdrawal symptoms, and a clinically recommended tapering protocol. You don't quit caffeine -- you taper off it.

HOW IT WORKS

Tell the app what you drink -- coffee, energy drinks, tea, soda, pre-workout, even chocolate. HALFLIFE calculates your true daily caffeine intake (most people underestimate by 40-60%) and builds a personalized taper plan that reduces your consumption by 10-25% per week.

Each day you get a caffeine budget -- not a prohibition, but a shrinking allowance. You choose how to spend it. One smaller coffee? Switch to half-caf? Green tea instead of espresso? The budget decreases on schedule until you reach your goal.

PREDICT WITHDRAWAL BEFORE IT HITS

HALFLIFE maps your expected symptoms to a medical timeline: when headaches will peak, when fatigue resolves, when brain fog clears. "Day 3: Expect moderate headache. Peak intensity: tomorrow. Resolution: day 7." The unknown becomes known. Fear becomes a plan.

SEE WHAT CAFFEINE DOES TO YOUR SLEEP

Your 3pm coffee means 47mg of caffeine is still in your bloodstream at midnight. Your "afternoon pick-me-up" is costing you deep sleep every single night. HALFLIFE's real-time pharmacokinetic timer shows exactly how much caffeine remains in your system at any moment -- based on published half-life research (5.7-hour average metabolism). Once you see the numbers, you can't unsee them.

BUILT ON SCIENCE, NOT WILLPOWER

• Personalized taper schedule based on your actual intake
• 50+ drinks and caffeine sources with accurate mg data
• Daily caffeine budget that decreases on a medical schedule
• Withdrawal symptom predictor mapped to clinical timelines
• Real-time half-life decay calculator
• Caffeine-sleep impact visualizer
• Symptom logging to track predicted vs. actual experience
• Substitution suggestions for every reduction step

Caffeine withdrawal is recognized by the DSM-5, and gradual tapering is recommended by the Cleveland Clinic, Mayo Clinic, and the American Academy of Sleep Medicine. HALFLIFE applies this clinical protocol to your specific intake -- so you can quit without the suffering that made you restart last time.

The people who beat caffeine don't white-knuckle it. They follow a protocol. This is yours.

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