Regimen vs OptiPin: Which TRT and Peptide Tracker Is Right for You? (2026)
OptiPin and Regimen are probably the two closest competitors in this space. Both handle TRT and peptides. Both take injection site tracking seriously. If you're running a protocol with multiple compounds, these are the two apps you should actually be comparing.
Feature Comparison
| Feature | Regimen | OptiPin |
|---|---|---|
| TRT dose logging | Yes | Yes |
| Peptide tracking | Yes | Yes |
| Injection site rotation | Yes (with body map) | Yes |
| Lab / bloodwork tracking | Yes (via health metrics) | Yes (detailed) |
| Half-life visualizer (blood level curves) | Yes | No |
| Medication-to-health-metrics correlation | Yes | No |
| Compound library | 600+ | 100+ |
| Apple Health integration | Yes | Unknown |
| Google Health Connect | Yes | No (iOS only) |
| Progress photos (side-by-side) | Yes | No |
| Smart dose reminders | Yes | Yes |
| Privacy-focused | Standard privacy practices | Highlighted feature |
| iOS | Yes | Yes |
| Android | Yes | No |
| Rating | 4.9+ stars | 4.47 stars |
| Pricing | Free for 1 compound, $4.99/mo premium | Freemium, $3.99/mo or $74.99-99.99 lifetime |
Regimen
Regimen gives you free tracking for one compound with every feature unlocked — PK curves, injection site rotation with a body map, and health metric correlation that connects your weight, body fat %, blood pressure, heart rate, and sleep to your dosing timeline via Apple Health or Google Health Connect. The medication-to-health correlation is the standout: you can see how your blood pressure responds to dose adjustments, or whether splitting your injections improved your resting heart rate.
With 600+ compounds in the library, Regimen covers TRT esters, HCG, aromatase inhibitors, peptides, GLP-1s, and less common compounds that might not appear in smaller libraries. It's available on both iOS and Android, and carries a 4.9+ star rating in the App Store.
Premium ($4.99/mo or $39.99/yr) unlocks tracking for multiple compounds when your protocol grows.
OptiPin
OptiPin's strongest card is its privacy-first approach. No accounts required, everything stays on your device. If keeping your health data completely local is a non-negotiable for you, that's a real differentiator worth taking seriously. The TRT and peptide community has legitimate reasons to care about data privacy, and OptiPin leans into that harder than any other app in this space.
The app supports 100+ medications with level projections for testosterone, DHT, and GLP-1 compounds. Dedicated bloodwork tracking with biomarker-specific features is a genuine strength if you log every blood panel in detail.
The tradeoffs: OptiPin is iOS only, so Android users are out entirely. The 4.47-star rating across 75 reviews is decent but sits below Regimen's. And the lifetime pricing ($74.99-99.99) is steep compared to alternatives.
Track your full protocol for free
- 600+ compounds with PK curves and health metric correlation
- One compound free forever, no feature paywalls
- Available on iPhone and Android
Frequently Asked Questions
Ready to track your protocol?
- Smart reminders so you never miss a dose
- Track weight, photos, and progress over time
- Medication level curves for every compound