Track Your Testosterone: See How It Affects Your Body
Log injections, visualize your blood levels between doses, and connect your testosterone protocol to the health metrics that matter.
Testosterone Cypionate, Enanthate, Propionate
Regimen is the testosterone tracker app that shows you what's happening between injections. Whether you're on testosterone cypionate, enanthate, propionate, or undecanoate, Regimen logs every injection, models your estimated medication levels with PK curves built on published pharmacokinetic data and FDA prescribing information, and correlates your protocol to blood pressure, weight, body fat, energy, mood, and sleep. This isn't just a dose log. It's the complete picture of how testosterone is affecting your health. Free for your first compound, every feature unlocked. No paywall, no trial, no credit card. 4.9 stars on iOS and Android.
TRT isn't one injection. It's an ongoing protocol.
Managing testosterone is more complex than most realize:
Juggling multiple compounds (testosterone + HCG + AI) on different schedules — and hoping you don't mix up doses
Not knowing if your symptoms improve because of the dose, the timing, or the ester you switched to
Tracking bloodwork results against your protocol changes to show your doctor what's actually working
Dose with precision
Regimen handles the complex math so you don't have to. Two built-in calculators give you exact numbers every time.
Peptide reconstitution calculator
Input your vial size, bacteriostatic water volume, and desired dose. Regimen tells you exactly how many units to draw on your syringe.
mL dose calculator
Enter your prescribed dose (mg) and concentration (mg/mL) to get the precise injection volume. Perfect for testosterone and oil-based compounds.
Never miss a dose. Never miss a cycle.
Stay consistent with zero effort. Regimen supports every dosing schedule you could need, with smart reminders to keep you on track.
Every schedule you need
Daily · specific days · split-week · every X days · twice daily · as-needed. Injections, pills, creams, sprays. Your protocol, your way.
Cycle management
Set your cycle duration and get alerts when it's time to cycle off or begin again. No more mental math or calendar counting.
See what's actually working
Correlate every compound and dose change against real health data. Stop guessing which protocol is moving the needle.
Auto-sync from Apple Health & Google Health Connect
Weight, body fat, sleep, resting heart rate, and blood pressure flow in automatically. No manual logging required.
Track how you feel, not just what you measure
Log energy, sleep quality, cravings, and daily notes alongside your biometrics. See the full picture of how your protocol affects you day to day.
Correlate medications with health trends
Changed your TRT dose three weeks ago? See exactly how your weight, sleep, and heart rate responded. Every dose change is overlaid on your health charts.
Know what's in your system
See estimated concentration curves for your compounds in real time. Know if you're at peak, trough, or steady state without waiting for labs.
Pharmacokinetic modeling for 40+ compounds
Regimen uses half-life data to model absorption, peak levels, and decay for every dose you take. See how levels build up over multiple doses.
Peak, trough & steady state visibility
Understand where you are in your dosing cycle at any moment. See projected future levels based on your current schedule.
Why tracking testosterone matters
Multi-compound protocol management
Most TRT users run testosterone + HCG + an AI. Regimen tracks all three on their own schedules with separate reminders and dose logging.
Bloodwork correlation
Changed your dose 6 weeks ago? See exactly where your protocol was when your latest labs were drawn. No more guessing what produced those numbers.
Injection site rotation
Ventrogluteal, deltoid, quad — rotating sites matters for absorption and scar tissue. Regimen logs where you inject, not just when.
What Regimen Tracks for Testosterone
Why people are switching to Regimen
"I was juggling my peptide schedule between a notes app and my calendar, and I was constantly stressed about missing a dose. Regimen fixed all of it. The reminders and calculator are essential."
Alex T., Bio-Optimizer
"I finally feel in control of my weight loss journey. The photo comparison feature is addictive. Seeing my progress next to the tracking data motivates me way more than just the number on the scale."
Sarah K., GLP-1 User
How Regimen compares to other testosterone tracker apps
Most testosterone-tracking apps focus on injection logging only. Regimen treats lab trends as a first-class view with Free T calculation and multi-year visualization. See also /blog/regimen-vs-mytrt and /blog/regimen-vs-optipin.
| App | Dose Calculator | Lab Tracking | E2 / HCT / PSA | PK Modeling | Multi-Compound | Apple Health | Free Tier |
|---|---|---|---|---|---|---|---|
Regimen | Built-in TRT calc | Full panel | All markers | Peak/trough | Unlimited (Pro) | Apple Health + Google Health Connect | One compound free |
| Partial (not advertised) | 25-55+ biomarkers | Yes | No (not advertised) | Partial (TRT-focused) | Partial (not explicit) | Freemium | |
| Partial (not advertised) | Total T, Free T, SHBG, E2, PSA, Hct | Yes | No (not advertised) | Partial (TRT-focused, multi-route) | Partial (not explicit) | Freemium | |
| Syringe units | Bloodwork | Partial (not detailed publicly) | No (not advertised) | TRT + peptides + GLP-1 (100+ meds) | Partial (not explicit) | Freemium |
Feature coverage based on publicly available app descriptions and pricing as of May 2026. See each app's App Store listing for current details.
How we built the testosterone tracker
The testosterone tracker is the lab-focused view of TRT (and natural testosterone management): the dose tracker is the operational side (what you injected and when), and the testosterone tracker is the trend-side (what your numbers are doing across months and years). They share the same underlying data, but this page is built for people who think in labs first.
What that looks like:
- Full lab panel tracking: Total T, Free T, SHBG, Estradiol (sensitive assay), Albumin, plus any other markers you add (DHEA-S, Cortisol, Prolactin, etc.).
- Free Testosterone calculation: built-in calculator using Total T + SHBG + Albumin. Many labs don't return calculated Free T, so the app handles the math.
- Long-term trend visualization: every lab pull plots on a multi-year chart with dose history overlaid. Useful for seeing how hormone trajectory moves over the long horizon (not just dose-to-dose).
- Dose-to-lab correlation: when you change dose, ester, or frequency, the next lab pulls show in context. The app shows the lag time so you can see how long changes take to register in labs.
- Apple Health and Google Health Connect: weight, body fat, sleep, resting heart rate, blood pressure auto-sync. Useful for correlating hormone levels with body composition and recovery markers.
- Multi-compound support: testosterone alongside any other compound you're tracking.
- Natural T management: the tracker works for non-TRT users too (people watching their natural testosterone levels with lifestyle interventions).
Your data stays private
Your health data is stored securely. We never share, sell, or monetize your information. What you track is your business, not ours.
Frequently Asked Questions
What testosterone lab markers can I track over time?
Total Testosterone, Free Testosterone, SHBG, Estradiol (sensitive assay recommended), and Albumin are the core panel. You can add any other marker (DHEA-S, Cortisol, Prolactin, LH, FSH) as needed. Each lab pull plots on a long-term trend chart.
Does Regimen calculate Free Testosterone if my lab doesn't report it?
Yes. The built-in Free Testosterone calculator uses Total T + SHBG + Albumin to compute calculated Free T. Many labs don't include calculated Free T in the standard panel, so the app handles the math.
Can I track how my testosterone responds to dose changes?
Yes. Every dose change (ester switch, frequency change, mg change) shows on the same chart as your lab pulls. The chart shows the lag time between protocol changes and lab response.
Does Regimen work for people not on TRT?
Yes. The testosterone tracker works for natural T management (people watching their levels with lifestyle interventions). The same lab tracking applies whether you're on exogenous testosterone or not.
Can I correlate testosterone with body composition?
Yes. Apple Health and Google Health Connect pull weight, body fat percentage, resting heart rate, and sleep. Each lab pull shows in the context of those metrics for the same time window.
How does Regimen compare to MyTRT or OptiPin for testosterone tracking?
See the comparison table above. Short version: those apps focus on TRT operationally (injection logs). Regimen handles the lab-trend side as a first-class view, with Free T calculation, multi-year trend visualization, and multi-compound support if you're tracking other things alongside testosterone.
Is there a free testosterone tracker in Regimen?
Yes. The free tier covers one compound, including testosterone, with full lab tracking, dose logging, side-effect tracking, and Apple Health sync. Pro ($4.99/month) unlocks multi-compound tracking and Signals.
What about secondary markers (LH, FSH, Prolactin)?
You can add any custom marker. Many TRT users on Regimen also track LH and FSH (especially when running HCG alongside) and Prolactin (relevant for some side-effect patterns).
Stop guessing. Start optimizing.
Your protocol deserves better than a notes app and a calendar.