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 difference is the experience. Regimen is built to simplify your protocol and feel intuitive from day one. OptiPin is powerful and packs a lot in, but that breadth comes with a denser interface and a steeper learning curve.
Last updated: May 2026
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 feel takes a few taps. It's built to simplify your protocol, not bury it under options. OptiPin is powerful and packs a lot in, but that breadth comes with a denser interface and a steeper learning curve.
Understand what your protocol is doing
Logging is only half of it. Regimen's insights engine connects your bloodwork (total T, free T, estradiol) and how you feel 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 feel 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 feel to your doses) | Yes (purpose-built) | AI summary |
| Reconstitution / dose calculators (HCG and more) | Yes | Yes |
| Inventory / vial tracking | Yes | Yes |
| Progress photos (side-by-side) | Yes | No |
| Data stored locally / no account | No | Yes |
| Free tier | Yes | Yes |
| Starting price | $4.99/mo | $4.99/mo |
| Rating | 4.9 stars (70+ reviews) | 4.7 (109) |
Why Regimen
Designed to simplify your protocol: intuitive from day one, where OptiPin is powerful but denser with a steeper learning curve.
A purpose-built insights engine that connects your bloodwork and how you feel 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 tracking, testosterone level curves, inventory, and dose calculators are all there.
Which app should you use?
Choose Regimen if you want a TRT tracker that's intuitive to use and helps you understand what your protocol is doing to your bloodwork and how you feel.
Choose OptiPin if 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 feel 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.