Vial Logic is a private, offline-first companion for anyone running a peptide or injectable protocol and tired of juggling spreadsheets, notes apps, and calculator screenshots.

Build a protocol once and the app handles the rest: the schedule, the reminders, the reconstitution math, and the record of what you actually took.

WHAT YOU CAN DO

Today at a glance
See every dose due today, log it in two taps, and check what is coming next. Missed and upcoming doses are always visible, so nothing quietly slips.

Protocols that do the math
Set a peptide, dose, frequency, and time of day. Vial Logic converts your dose into exact syringe units for your vial's concentration and shows it as a single clear line, for example "8U - 2mg - Morning". Titration schedules, cycles, and rest weeks are supported.

Reconstitution and dose calculator
Enter vial strength and bacteriostatic water volume and get concentration in mg/mL plus the units to draw on a U-100 syringe. Work backwards from a target dose too.

Inventory and vial tracking
Track sealed and mixed vials, remaining volume, doses left, and expiry. Get an alert before mixed stock expires and before you run out mid-protocol.

Half-life simulator
Model the concentration curve of your protocol over time using published half-life values, so you can see accumulation, steady state, and washout.

Protocol Planner
Lay several protocols side by side on one timeline to spot overlaps, stacking, and gaps before you commit.

Injection site rotation
Log where each injection went on an interactive body map and keep sites rotating properly.

Journal and trends
Record weight, sleep, energy, appetite, mood, side effects, and free-form notes. Labeled charts show how those markers move alongside your protocol.

Lab results
Enter bloodwork manually for free, or import a lab PDF and confirm the extracted values. Biomarkers are shown with reference ranges and tracked over time.

Research library
A built-in reference on common peptides: typical dosing ranges, half-life, storage, and reconstitution guidance, with sources.

Reminders
Local notifications for every scheduled dose and for reconstituted vials nearing expiry.

Your data stays yours
Everything is stored on your device. No account is required to use the app. Export your full history as JSON or CSV whenever you want, and delete it all in one tap.

VIAL LOGIC PRO

The free plan covers up to 4 protocols and 4 peptides, manual lab entry, reminders, the dose calculator, the half-life simulator, the journal, and the research library.

Pro unlocks:
- Unlimited protocols and peptides
- Lab PDF import
- Protocol Planner
- JSON and CSV export
- AI lab and trend insights (coming soon)

Pro is 3.99 USD per month or 39.99 USD per year. Prices may vary by region. Payment is charged to your Google Play account, and a subscription renews automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel anytime in Google Play account settings.

Cancelling never locks you out of your own data. Free limits only apply to adding new entries, so everything you have already saved stays fully readable and editable.

IMPORTANT

Vial Logic is a personal tracking and calculation tool. It is not a medical device and does not provide medical advice, diagnosis, treatment, or dosing recommendations. Reference dosing ranges come from published literature and are for informational purposes only. Always consult a qualified healthcare professional before starting, changing, or stopping any protocol, and follow their guidance and your local laws. You are responsible for verifying every calculation before use.