Simple, honest pricing
The tools that help you research and calculate are free. The tracking and optimization features are Pro.
Free
Free forever. No credit card needed.
- All peptide calculators (reconstitution, dosage, half-life, syringe)
- Full peptide directory — 30+ peptides
- Educational blog & guides
- Protocol creation & dose logging
- Calendar view & CSV import/export
- Basic injection site selection
- Free account — sign in with email code
Pro
- Everything in Free
- Inventory manager — track vials, costs, expiration
- Progress tracker — weight, measurements, trends
- Smart injection site suggestions with body map
- AI insights — correlate your protocol with progress
- Cloud sync across all devices
- Advanced analytics & adherence tracking
- Protocol export (PDF / CSV)
Pricing FAQ
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 payment methods do you accept?
We accept all major credit and debit cards through Stripe. Your payment info is never stored on our servers.
Can I cancel anytime?
Yes. Cancel anytime from your account settings. You'll keep Pro access until the end of your billing period.
Will there be a mobile app?
Yes. The Pro tracker is available as a mobile-optimized web app — same account, all devices. Native iOS/Android apps are planned.
Ready to start?
The calculators are live now. No account needed — just open one and start calculating.