The Full Feature Comparison
| Feature | Protocol | PepTracker | Pep AI | PeptIQ | PepCalc |
|---|---|---|---|---|---|
| Dose logging | ✅ | ✅ | ✅ | ✅ | ❌ |
| Reconstitution calc | ✅ | ❌ | ❌ | ❌ | ✅ ($9.99) |
| 3D body map | ✅ | ❌ | ❌ | ❌ | ❌ |
| AI research | ✅ Stack-aware | ❌ | ✅ Generic | ❌ | ❌ |
| Interaction checker | ✅ 30 pairs | ❌ | ❌ | ✅ | ❌ |
| Bloodwork tracking | ✅ 80+ markers | ❌ | ❌ | ❌ | ❌ |
| Habits + supplements | ✅ Only app | ❌ | ❌ | ❌ | ❌ |
| Local storage | ✅ | ❌ | ❌ | ❌ | ❌ |
| Android | ✅ | ❌ | ✅ | ❌ | ❌ |
| App Store rating | 5.0 ⭐ | 4.7 ⭐ | 4.3 ⭐ | 4.5 ⭐ | 4.4 ⭐ |
| Price | Free · $49.99/yr | Free · $47.99/yr | Free · $59.99/yr | Free · $39.99/yr | $9.99 one-time |
Which App Is Right for You?
Running a single peptide — BPC-157, TB-500, or similar
Any of the logging apps work. PepTracker is reliable and proven. Protocol gives you more room to grow — calculator, AI research, body map — without costing more. Start with Protocol's free trial and see if the extras matter to you.
Running GLP-1 or TRT alongside peptides
Protocol is the only option. It's the only tracker that handles GLP-1, TRT, and peptides together in a unified protocol. For GLP-1 specifically, the 3D body map for injection site rotation is a genuine advantage. See glp1tracker.health for the full GLP-1 comparison.
Privacy is a priority
Protocol is the clear choice. On-device only, no account required, Stealth Mode to disguise the app icon. No other peptide tracker offers all three privacy layers. Your protocol stays on your phone.
Just need the reconstitution calculator
Use the free web calculator at reconstitution.health. Or download Protocol — the calculator is built in and free for 14 days, compared to PepCalc's $9.99 one-time charge.
The Best Peptide App — Free to Try
14 days Pro at install. No opt-in, no credit card, no risk.
No account · On-device only · iOS + Android
Full Protocol research library: 81 compound profiles →
Detailed comparison: Protocol vs PepTracker →
Back to rankings: Best Peptide App 2026 Rankings →