Features

Everything you need to understand, track, and optimize your caffeine habits.

Know Your Caffeine, In Real Time

Not a simple counter — a real pharmacokinetic model that calculates absorption and decay of every dose.

  • Real-time mg level always visible
  • RISING / DECLINING / SLEEP READY states
  • Safe-to-sleep countdown timer
  • Daily budget tracker
  • Multi-dose superposition modeling
Koffee app showing real-time caffeine curve with pharmacokinetic modeling

Sleep Better Tonight

Your 3pm coffee costs you 45 minutes of sleep. Koffee knows exactly how much.

  • Sleep Score 0-100
  • Minutes-of-sleep-lost prediction
  • Personalized Last Call time
  • "What if I have coffee now?" simulator
  • Sleep quality correlation with HealthKit
Sleep prediction screen with Sleep Impact Score and last safe coffee time

Your Body, Your Profile

Not everyone metabolizes caffeine the same way. Koffee adapts to YOUR biology.

  • Slow / normal / fast metabolizer setting
  • Weight-based dosing calculations
  • Cortisol rhythm overlay for optimal coffee windows
  • HealthKit sleep & heart rate integration
Caffeine Persona card showing "The Rocket" archetype with tolerance trend chart

60+ Drinks, One Tap

From a 63mg espresso to a 200mg cold brew — your favorite coffee is already here.

  • 10 default presets
  • 50+ branded drinks (Starbucks, Dunkin, Costa, McCafe)
  • Unlimited custom drinks
  • Quick log from Lock Screen & Siri
  • 1-tap logging interface
Browse Brands screen with Starbucks, Dunkin, Costa, and McCafe drinks

Insights That Actually Help

Discover patterns you didn't know you had. And if you need a reset, we'll guide you.

  • Daily / weekly / monthly / yearly heatmaps
  • Koffee Wrapped (annual review)
  • 4 consumption archetypes
  • Guided caffeine reset protocol
  • Weekly digest reports
Yearly heatmap showing caffeine consumption patterns with drink history

Everywhere You Look

On your wrist, your lock screen, and your Dynamic Island. Always at a glance.

  • 14 widgets (Home + Lock Screen)
  • Apple Watch with 4 complications
  • Dynamic Island with live countdown
  • 16 coffee-themed color themes
  • Lock Screen quick logging
Settings screen showing 16 coffee-themed color themes and sleep configuration