Apple Health on day one. Whoop, Garmin, Oura, Fitbit on the roadmap. Manual logging for everything that doesn't have a wearable yet. One source of truth for your training load — sleep, HRV, sweat, intensity, recovery debt.
Most apps repeat the label. Kozen-X holds 560 entries — 350 supplements, 250 medicines — where every user-facing line is quoted from a named source with the date it was read. Your product's own serving sits beside the published reference values, with Singapore's HSA cap named as the one that applies here and the US figures shown for comparison. Where nobody has published anything, it says so instead of filling the gap.
Add what you take — by name, or by scanning the label — and Kozen-X tracks how much is left, when it runs out, and when to take it. Then it checks the whole shelf: supplement × supplement, supplement × food, supplement × medicine. Products resolve to their actual ingredients, so a branded creatine blend is checked on the calcium and magnesium inside it, not just the name on the tub.
Every dose you log writes back to Apple Health's medication section, so your supplement record sits with the rest of your health data instead of in a silo. Buy wherever you like — no brand pays to be on your shelf. Nobody buys their way into the knowledge base either.
Every flag names its source. No source, no flag.
Health data is the most personal data you have. Yours never leaves your phone — it stays on-device, protected by iOS encryption. The little we do store (your account) is encrypted in transit and at rest. We don't sell it, we don't share it with insurers, and we don't run ads. Read the privacy policy for the long version.
Privacy policy →The first 300 accounts get a founder number, 1 to 300, and never pay the subscription. When the app is paywalled later, founders keep the app and its features free for life — the app subscription only, not physical products should we ever sell any. From 301 on, a month costs less than your Starbucks coffee — a year, less than half your Netflix subscription. Subject to our Terms. Launching soon.