Serum: Supplement Tracker

Leyline Labs LLC

In-app purchases

About this app

Serum is a free supplement tracker and medication tracker that shows what each dose actually does over time. Log vitamins, minerals, prescriptions, hormones, peptides, and nootropics in one private app, and see modeled half-life curves, absorption, steady-state levels, and interaction warnings for your entire stack.

Most pill reminder apps just count doses. Serum adds population-based pharmacokinetic (PK) models: after you log a dose, it estimates release, absorption, metabolism, active-metabolite formation, and elimination for the compound and route you took — and shows the confidence behind every estimate.

TRACK EVERYTHING IN ONE PLACE
• 500+ built-in compounds: vitamins, minerals, prescriptions, hormones, peptides, nootropics, and more
• Custom compounds with your own half-life and bioavailability data
• Stacks and bundles: log a whole multivitamin as one dose — every ingredient gets its own curve
• Overlap detection flags the same compound coming from multiple sources

SEE WHAT A DOSE DOES
• Half-life curves for each compound and route, plotted against reference ranges
• Steady-state projections: modeled peak, trough, and time to steady state
• Loading suggestions, custom frequencies, on/off cycling, and as-needed (PRN) dosing
• Active-metabolite and prodrug conversion modeling
• Body-mass scaling from published 70 kg reference values
• Hormone levels shown in familiar units like pg/mL and ng/dL

CATCH STACK CONFLICTS
• 13,000+ modeled interaction checks, including 400+ manually documented interactions
• Absorption conflicts, contraindications, nutrient depletions, synergies, and timing requirements
• Time-varying drug-interaction overlays: active inhibitors and inducers rebuild victim clearance over time

STAY ON SCHEDULE
• Dose reminders with grouped notifications
• Optional persistent alarm mode for critical doses

PRIVATE BY DESIGN
• No account, no ads, no analytics, no Serum-operated cloud
• Tracker data stays on your device and is excluded from cloud backups
• Optional Health Connect medication-record sync you control
• Export your history to JSON, CSV, or PDF

GROUNDED IN RESEARCH
Every built-in compound links to peer-reviewed studies with plain-language summaries, and each route model is labeled validated, predicted, calibrated, inferred, or unverified so you know how much to trust it.

Also available in your browser at serumlog.com — free, no account needed.

Serum is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Its curves are population-level estimates, not measured laboratory results or individualized dosing instructions. Consult a healthcare professional for medical advice, diagnosis, or treatment and before starting or changing a regimen.

Privacy policy: https://serumlog.com/privacy.html
Support: [e-mail]

What’s new

Improved pharmacokinetic modeling, regimen reminders, Health Connect medication records, and stability.