Stim Check is a lightweight utility that tracks how much caffeine you consume and estimates how long it remains active in your body. By logging coffee, energy drinks or pre-workout, the app builds a real-time caffeine curve tailored to your weight and the expected caffeine half-life, so you can plan workouts, naps and late-day caffeine with more confidence. Athletes, gym-goers and anyone trying to manage sleep or optimize performance will appreciate the simple interface and focused calculations. The app is currently in public beta and the developer welcomes user feedback to refine features.

Key Features

⭐ Stim Check lets you log coffee, pre-workout and energy drinks with fast, simple entries.

⭐ Visualize a real-time caffeine curve that shows intake and decay across the day.

⭐ Personalized calculations based on your body weight and caffeine half-life estimates.

⭐ See how much caffeine is still active in your system at any moment.

⭐ Get a clear-by time indicating when levels are expected to drop below a sleep-safe threshold.

Advantages

✅ Stim Check helps you schedule caffeine around workouts and sleep so you can protect performance and recovery.

✅ Personalized decay estimates give more realistic timing than generic rules of thumb.

✅ Simple, fast and lightweight interface is designed for athletes and gym-goers on the go.

✅ Real-time feedback makes it easier to adjust habits and avoid late-night stimulation.

Disadvantages

❎ Currently in public beta, so some features may be incomplete or change as the app develops.

❎ Requires manual logging of drinks, since intake must be entered by the user.