Local-first. Transparent math. Works offline.
Fast, reliable peptide calculations — offline.
A peptide calculator for concentration + unit math from your inputs, plus preparations, schedules with on-device reminders, records, and inventory — all on device.
For informational and organizational use only. Not medical advice. Verify all calculations independently.
New in version 1.2
Blends, backup, and more control over your schedule.
The most requested update so far. Enter each component of a multi-component vial and see exactly what one measurement contains.
- Blend mode for vials with 2 to 6 components.
- Backup and restore your data with a single file.
- Delete a record added by mistake.
- Protocols several times a day, with an optional end date and a default vial.
- See how long a vial will last, with alerts before it expires or runs out.
Works offline
No accounts, no servers required. Calculations and records live on your device.
Local-first data
PepCalc Pro doesn’t collect analytics or track you. Exports are user-initiated only.
Transparent math
Optional “show your work” view makes results easy to verify independently.
Highlights
Built for the workflow, not just the math.
Save preparations, create schedules, keep records, and track inventory with a clean, focused interface.
Calculator with unit gauge visualization
Supports common unit scales with clear unit output and optional rounding behavior.
Save preparations for reuse
Store a named preparation with a calculation snapshot for consistency and auditability.
Schedules with reminders
Numeric schedules (every X days) with on-device notifications—no remote servers involved.
Inventory tracking
Reconstituted vials with depletion tracking and a ledger-style history.
Need help or want to suggest an improvement?
We aim to respond within 2–3 business days.