Regimen vs OptiPin: Which TRT Tracker Is Right for You?
Both are capable TRT trackers. You can log your esters, rotate sites, track your bloodwork, and see your testosterone levels between injections in either one. The main verified differences: Regimen is native on iPhone, Android, and web with Apple Health and Google Health Connect, and its Signals engine connects your labs and daily check-ins to your protocol. OptiPin is iOS-only with a strong local-first privacy stance. OptiPin also packs a lot in, and some users find the learning curve steeper.
Last verified: July 8, 2026 · By the Regimen Team
Sources: OptiPin on the App Store · optipin.app
Native on every device you use
Regimen runs natively on iPhone, iPad, Android, and the web, with Apple Health on iOS and Google Health Connect on Android for two-way sync of weight, sleep, and heart data. OptiPin is iOS-only. If your household is split across platforms, or you want to check your protocol from a browser at work, that's the verified structural difference between the two apps.
Designed to simplify your protocol
Set up your protocol once. Logging takes seconds.
A TRT tracker only helps if you actually keep using it, and that comes down to how it feels day to day. Regimen is designed with the user in mind: set up your protocol once, and logging your injection, sites, and how you're responding takes a few taps. It's built to simplify your protocol, not bury it under options.
Understand what your protocol is doing
Logging is only half of it. Regimen's Signals engine connects your bloodwork (total T, free T, estradiol) and how you're responding day to day (energy, libido, sleep, mood) to your dose and protocol changes. So you can see what's actually moving your numbers, and how you're responding as you adjust. That's the difference between recording your TRT and understanding it.
Feature Comparison
| Feature | Regimen | OptiPin |
|---|---|---|
| Built for TRT (esters, schedules, site rotation) | Yes | Yes |
| Bloodwork / lab tracking (T, free T, estradiol) | Yes | Yes |
| Testosterone level curves between injections | Yes | Yes |
| Daily check-ins (energy, libido, sleep, mood) | Yes (50+ markers) | Yes |
| Insights engine (connects labs + how you're responding to your doses) | Yes (Signals) | Not advertised |
| Reconstitution / dose calculators (HCG and more) | Yes | Yes |
| Inventory / vial tracking | Yes | Not advertised |
| Progress photos (side-by-side) | Yes | Not advertised |
| Platforms | iOS, Android, Web | iOS only |
| Apple Health + Google Health Connect | Both | Apple Health |
| Data stored locally / no account | No | Yes |
| Free tier | Yes | Yes |
| Starting price | $4.99/mo | $4.99/mo |
| Rating | 4.9 stars (230+ reviews) | See App Store |
Why Regimen
Native on iPhone, Android, and web: with Apple Health and Google Health Connect, so your data flows wherever you are. OptiPin is iOS-only.
A purpose-built Signals engine that connects your bloodwork and how you're responding to your dose changes, so you can dial in your protocol.
Side-by-side progress photos to track changes over time.
Free for your first protocol, with every feature unlocked.
Where OptiPin is strong
Privacy by design: no account required, with everything stored locally on your device. If you want your health data to never leave your phone, that's a real advantage.
Genuinely capable: bloodwork-calibrated T, DHT, and E2 level modeling, a 100+ site rotation map, and dose calculators are all there.
Which app should you use?
Choose Regimen if you want a native TRT tracker on iPhone, Android, or the web that helps you understand what your protocol is doing to your bloodwork and how you're responding.
Choose OptiPin if iOS-only is fine and you want everything stored locally on your device with no account.
Frequently Asked Questions
What's the main difference between Regimen and OptiPin?
Both are capable TRT trackers with bloodwork tracking and testosterone level curves. Regimen is designed to be intuitive and connects your labs and how you feel to your protocol so you can dial it in. OptiPin is powerful but more feature-dense. OptiPin's edge is privacy: everything stays on your device.
Is Regimen only for TRT?
No. Regimen is built for TRT first, and it also handles peptides and GLP-1 medications well if you add them to your protocol.
Can Regimen track my bloodwork over time?
Yes. Log your total T, free T, estradiol, and other labs, and Regimen maps them against your dose history alongside how you're responding day to day.
Which app is more private?
OptiPin, by design: no account, data stored locally. Regimen syncs your data so it's there when you need it.
Is Regimen free?
Yes, free for one protocol with every feature unlocked. $4.99/mo for more.
Try Regimen Free
One protocol. Every feature unlocked. No credit card required.