Best TRT Tracker App: Log Injections, Monitor Labs, See Peak and Trough
The TRT tracker that shows you how testosterone is actually affecting your health.
Testosterone Cypionate, Testosterone Enanthate, HCG, AI Protocol
Regimen is the TRT tracker built for people who want to optimize, not just inject and forget. Log every testosterone injection, visualize your peak and trough blood levels with PK curves based on published pharmacokinetic data and FDA prescribing information, track blood pressure alongside your protocol, and see exactly how your TRT is affecting your energy, mood, and body composition. Whether you're on weekly injections, EOD microdosing, or daily subQ, Regimen tracks it. Free for your first compound, every feature unlocked. No paywall, no trial, no credit card. Rated 4.9 stars on iOS and Android.
Your TRT clinic gives you a protocol. Not a system.
Most men on TRT are winging it after the first appointment:
Remembering whether you injected Monday or Tuesday this week — especially on EOD or E3.5D protocols
Managing ancillaries (HCG, anastrozole, DHEA) alongside testosterone with no unified tracking
Walking into bloodwork appointments without being able to explain exactly what your protocol looked like for the past 6 weeks
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 TRT matters
Protocol precision
Whether you inject every 3.5 days, every other day, or daily — Regimen schedules your exact protocol and reminds you at the right time.
Full stack visibility
Testosterone + HCG + AI + supplements. See your complete protocol on one screen instead of scattered across calendars and notes.
Optimize with data, not feelings
Correlate your injection history with weight, sleep, heart rate, and energy from Apple Health. Stop guessing if your protocol is dialed in.
Related Tools & Guides
What Regimen Tracks for TRT
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 TRT tracker apps
Most TRT trackers are single-purpose injection logs. Regimen handles TRT plus any other compound on one timeline, with PK modeling and a built-in dose calculator. Dedicated head-to-head pages: /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 TRT tracker
TRT is the longest-running tracking discipline in the Regimen user base, and the operational complexity is real: people switch between testosterone esters (cypionate, enanthate, propionate, Sustanon), switch injection frequencies (weekly down to daily microdosing), and watch a full panel of labs (Total T, Free T, SHBG, Estradiol, Hematocrit, PSA) over multi-year horizons. The tracker is built to handle all of that on one continuous timeline.
What that looks like in the app:
- TRT dose calculator: enter your weekly mg target, the ester concentration (typically 200 mg/mL for cypionate or 250 mg/mL for Sustanon), and your injection frequency, and the calculator outputs per-injection mL.
- Multi-ester support: switch between cypionate, enanthate, propionate, and Sustanon without losing history. Useful if your protocol changes or you fill what's available.
- PK modeling (peak and trough): shows the steady-state testosterone curve for your specific protocol. Useful for seeing why daily microdosing produces different lab numbers than weekly injections, even at the same weekly total.
- Full lab panel tracking: Total T, Free T, SHBG, Estradiol (sensitive assay), Hematocrit, PSA, plus any other markers you watch. Each lab pull plots on the dose timeline so trends are visible against protocol changes.
- HCG tracking: many TRT users run HCG alongside testosterone. Both log independently on the same timeline.
- AI inhibitor (Anastrozole, etc.) support: if your protocol includes an AI, log it as a separate compound and see how it tracks against E2 movement.
- Apple Health and Google Health Connect: weight, body fat, resting heart rate, blood pressure, sleep auto-sync.
- Multi-compound support: TRT alongside GLP-1, peptides, or other compounds. One timeline.
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
How do I log my TRT injections in Regimen?
Log each injection with date, ester, dose in mg or mL, and site. The app keeps a continuous protocol history regardless of how your dose, ester, or frequency changes over time.
Does Regimen calculate TRT dose conversion (mg to mL to syringe units)?
Yes. The TRT calculator handles weekly mg to per-injection mL conversion based on your ester concentration (typically 200 mg/mL for cypionate, 250 mg/mL for Sustanon). It also outputs insulin syringe units if you use a sub-Q protocol.
Can I track Hematocrit and Estradiol levels alongside testosterone?
Yes. Full lab panel tracking includes Total T, Free T, SHBG, Estradiol (sensitive assay), Hematocrit, PSA, and any other markers you add. Each lab pull plots on the dose timeline.
Does Regimen show peak and trough levels for different injection schedules?
Yes. PK modeling shows the steady-state testosterone curve for your specific protocol (ester, frequency, dose). Useful for seeing why daily microdosing produces different lab numbers than weekly injections at the same weekly total.
How does Regimen compare to MyTRT, TRT Tracker, or OptiPin?
See the comparison table above, and the dedicated comparison pages at /blog/regimen-vs-mytrt and /blog/regimen-vs-optipin for deeper comparison. Short version: those apps focus on TRT only. Regimen handles TRT plus any other compound (peptides, GLP-1, supplements) on one timeline, with PK modeling and built-in dose calculator.
Can I track HCG alongside TRT in Regimen?
Yes. HCG logs as a separate compound on the same timeline as testosterone. Many TRT users run both; the app keeps them on one screen.
Does Regimen support daily microdosing TRT protocols?
Yes. Any injection frequency works (weekly, twice-weekly, every other day, daily). PK modeling shows the steady-state curve so you can compare protocols.
Is there a free TRT tracker option?
Yes. The free tier covers one compound, including TRT, with full dose logging, lab tracking, side-effect tracking, and Apple Health sync. Pro ($4.99/month) unlocks multi-compound tracking and Signals.
Stop guessing. Start optimizing.
Your protocol deserves better than a notes app and a calendar.