OptiPin
OptiPin vs Regimen
Two of the most capable peptide, TRT, and GLP-1 trackers — compared honestly. We make OptiPin, so we've been clear about where Regimen genuinely wins.
The verdict
Choose OptiPin if you want privacy-first, on-device tracking with bloodwork-calibrated level forecasting and no account.
Choose Regimen if you need Android, cloud sync across devices, progress photos, or its wearable/symptom correlation engine.
| OptiPin | Regimen | |
|---|---|---|
| Platforms | iOS | iOS + Android |
| On-device · no account | ✓ | ~Cloud account |
| Level forecasting | ✓ | ✓ |
| Calibrated T & E2 modelbloodwork-tuned, reference ranges | ✓ | — |
| AI insight summariesdosing × Health × symptoms × labs | ✓OptiInsight | — |
| Titration with dose steps | ✓ | ~Cycle on/off |
| Dose / reconstitution calc | ✓200+ & blends | ✓Web tools |
| Injection sites mapped | 40+ | Standard |
| Inventory tracking | ✓ | ~ |
| Progress photos | ✓ | ✓ |
| Bloodwork auto-import (Apple Health) | ✓ | ~Manual labs |
| Symptom / wearable correlation | ✓ | ✓Signals |
| Free web tools & content | ~Growing | ✓Extensive |
| Multi-language (in-app) | ✓EN · DE · ES · PT | — |
| Free tier | 1 med + trial | 1 compound |
Reflects publicly listed features as of June 2026. Check each App Store / Play Store listing for current features and pricing.
Where OptiPin wins
AI insight summaries. OptiInsight, OptiPin's AI engine, generates plain-language insights that connect your dosing, Apple Health data, logged symptoms and mood, and bloodwork. Regimen offers correlation analytics (Signals) but not AI-generated insight summaries.
Calibrated hormone modeling. OptiPin's testosterone and estradiol forecasting uses dedicated, ester-specific PK models that recalibrate to your bloodwork and show estimates against reference ranges — deeper than Regimen's general-library modeling.
Titration with dose adjustments. OptiPin builds titration schedules with automatic stepped dose changes; Regimen's cycle support is on/off without dose stepping.
Privacy, sites, and inventory. No account, data on-device; 40+ mapped injection sites for granular rotation; vial/pen inventory with low-stock alerts and one-tap blend expansion (GLOW, KLOW, Wolverine and more).
Where Regimen wins
Android and cloud sync. Regimen runs on both platforms and syncs across devices — OptiPin is iOS-only and on-device. If you're on Android or switch devices often, that's decisive.
Content and web tools. Regimen publishes a large library of free web calculators and articles. OptiPin's free half-life visualizer, free testosterone calculator, and other calculators are catching up, but Regimen's catalog is broader today.
(Both apps offer progress photos and dose–symptom correlation, so those aren't a deciding factor.)
Who should choose which
If you want the deepest capability — AI insights, bloodwork-calibrated hormone modeling, dose-adjusting titration — and on-device privacy, and you're on iPhone, OptiPin is the stronger fit. If you need Android, cross-device cloud sync, or Regimen's content library, Regimen is the better choice. Both have a free tier, so you can try each.
Private, on-device, with calibrated forecasting
14-day full trial, no account, no cloud required.
Download on the App Store