Hi everyone! When I’m not teaching history to my students, I spend my nights building native Apple. I'm the solo developer behind Takatoke Factory, and today I'm launching BioDecay for iOS. This project started because I was tired of traditional health logs. Most apps just let you type numbers into a spreadsheet-like grid, but they don't tell you what is actually happening inside your body. I wanted to build something that could actively simulate and visualize human physiology. BioDecay is a high-precision pharmacokinetic modeling engine that calculates and displays your metabolic absorption and decay curves in real time. It factors in variables like hydration levels, biological sex, ambient temperature, and habits. You can download the app and use it completely free to monitor your water and caffeine intake. If you want to dive deeper into your bio-interactions, a single in-app purchase unlocks the advanced engines for protein, creatine, and magnesium. I work on regular updates to polish every detail, squash bugs, and gradually add new features based on your feedback. I’d love to know your thoughts and suggestions. Thank you so much for supporting solo indie developers!

BioDecay

Science-driven supplement & caffeine pharmacokinetic modeler

Science-driven supplement & caffeine pharmacokinetic modeler