Simple, honest pricing
The tools that help you research and calculate are free. The tracking and AI features that help you optimize are Pro.
Free
No signup. No card. No limits.
- All peptide calculators (reconstitution, dosage, half-life, syringe)
- Full peptide directory — 14+ peptides
- Educational blog & guides
- No account required
Pro
or $49.99/year · Save 40%
Early access pricing for waitlist members.
- Everything in Free
- Protocol tracker — log injections, doses, and cycles
- Multi-compound stacking planner
- Injection site rotation with body map
- AI insights — correlate your protocol with your progress data
- Apple Health & Google Health Connect sync
- Progress photos & measurements
- Protocol export (PDF / CSV)
Pricing FAQ
When does the Pro plan launch?
We're targeting Q2 2026. Join the waitlist on the homepage to get early access and a discounted launch price.
Will the calculators ever go behind a paywall?
No. Free tools stay free. The calculators are the foundation of PepStack and will always be accessible without an account.
What will Pro cost?
Planned pricing is $6.99/month or $49.99/year (~$4.17/month). Waitlist members will receive a discounted launch offer.
Will there be a mobile app?
Yes. The Pro tracker will be available as a mobile app (iOS and Android) via our web app — same account, all devices.
Ready to start?
The calculators are live now. No account needed — just open one and start calculating.