Built for TRT and enhanced athletes. TRT Plus helps you stay organized, optimized, and dialed in through every phase, from TRT to peak conditioning and contest prep.
Stay on top of every detail with a protocol dashboard, compound plotter charts, enhanced athlete-specific bloodwork analysis, advanced T fluctuation pharmacokinetics, automated medication reminders, injection rotation planning, dynamic inventory tracking, automated bloodwork scanning, pathology partner integration, and in-depth insights into your health. All in one place.
Track your protocol with advanced pharmacokinetic modeling that visualizes compound behavior over time, choose from 80+ pre-configured compounds with one-tap setup, and analyze your bloodwork using enhanced reference ranges built for optimization, not general slopulation averages.
• My Protocol
Daily Dashboard - View today's schedule with checkboxes to track completion.
Visual Syringe - See today's injections with quick injection stacking.
Compound Library - Choose from 80+ pre-configured compounds, from classic to cutting-edge, including anabolics, TRT ancillaries, peptides and SARMs with one-tap addition to your protocol.
Compound Half-Life Charting - Pharmacokinetic modeling showing peak levels, steady-state timing, and clearance patterns for each compound.
T Level Fluctuation - Advanced pharmacokinetic models to show your peak to trough oscillation.
Manage Ancillary Compounds - Schedule and track your medications and supplements alongside your TRT.
Protocol Summaries - Clean "bro notation" format for easy sharing.
Medication Reminders - Provides discreet notifications at times you are due.
Rotation Planner - Plans your injection site rotation to ensure even rotation between sites.
Inventory Management - Enter your total supplies to calculate when they run out, and receive advance notifications when it's time to reorder.
• My Biomarkers*
Upload your bloodwork to extract the key TRT and performance-related markers.
We use enhanced reference ranges tailored for optimization to deliver a clear red, amber, green breakdown.
A weighted algorithm scores how on point you are on your current protocol.
Detailed Bloodwork Report - Provides personalized recommendations for lifestyle, supplements, and medicinal options for areas of concern in your bloodwork, guided by the latest TRT and hormone optimization best practices. Your report also covers:
Muscle Building Potential - Assess your potential for gaining muscle based on key hormonal markers.
Hormonal Balance - Interprets your testosterone-to-estradiol and testosterone-to-SHBG ratios to optimize androgenic performance safely.
Responder Type - Are you a normal, low, hyper, super or non-responder to testosterone.
Pathology Partner Integration - Access athlete-specific markers beyond outdated panels (region dependent).
Support for international bloodwork - Quickly convert between units for Testosterone, Estradiol, Free T, DHT, HbA1c, ApoB and IGF-1.
Bloodwork Reminders - Recommends retesting timeframes, according to your last results and in line with TRT best practices.
• The Testimator™
Analyze your individual response to testosterone and fine-tune your protocol.
Predict your testosterone levels across different protocols and dial in to your ideal range*.
Now with dynamic reference ranges based on your Biomarker results.
• My Free T*
The most advanced Free T calculator available with four methods including the gold standard Vermeulen, plus Mazer, Södergård, and Zakharov for superior TRT accuracy.
• Contextual Knowledge Base
Learn about biomarkers, pharmacokinetics, testosterone metabolism, injection protocols (SubQ vs IM), and optimization best practices.
Recommendations backed by 100+ clinical citations from peer-reviewed studies covering bloodwork optimization, SHBG/Free T adjustments, hematocrit control, and liver health management.
One-Off Purchase - No annoying subscriptions or ads.
*Requires bloodwork.
I was at first a little skeptical about this app but I’m giving it 5 stars because it really is very accurate and easy to use I was able to compare apples to apples it’s calculated numbers with my latest lab work results and the numbers were accurate, It’s going to be a great tool to help me forecast my T levels wether I’d be on a blasting or cruising dose it will sure provide me with guidance in a way that I will stay within healthy levels, also when reaching out to customer support Nathan gets back to you promptly and has all the right answers…. Highly recommended 💪🏽😎👍🏽
Developer Response
Thank you, really appreciate the honest review. The accuracy of The Testimator is something I've put a lot of work into, so great to hear it held up against your actual lab results. You're not alone either... so many guys reach out saying The Testimator predicted near exact levels to what came back in their bloodwork. Pharmacokinetic principles are powerful when applied correctly 💪🏼
Keeps getting better
Potato651
I’ve had this app for awhile now. I must say the updates keep making this app better. It’s helping me keep track of my protocol.
Developer Response
Really appreciate the loyalty, thank you. Guys like yourself are a big part of what drives the updates, plenty more still to come. If there's anything you'd like to see added, always happy to hear it.
Very unintuitive
mcpooh123
Heh, really wanted to like this app, but it is not user friendly as it does not follow any usual guidelines about buttons and icons. I still cannot find how to delete one of peptides: In most cases when I hit peptide name the keyboard pops up and hides the input :), so I spend time trying to figure out how to hide the keyboard, on tapping almost anywhere else... nothing happens. How to log and find previous data is also jumps through the hoops. Try to change the frequency. .. you will hit date picker 20 times and will be close to break your phone :). What to do with the rotation widget is still a mystery for me: I simply cannot find how to specify and how to find the previous value :)
Developer Response
Hi McPooh123, thanks for the detailed feedback. Happy to walk you through a few things that might help. To delete a compound, tap the trash icon. After typing, tap the tick on the keyboard to dismiss it. Every field has built-in guidance, just tap any heading with a chevron > next to it. For the rotation schedule, tap Rotation > and a detailed guide will pop up with simple instructions to follow. For Rotation setup specifically you just enter your preferred sites, for example Left Delt, Right Delt, Left Ventroglute, Right Ventroglute... and the app forecasts them out on the calendar rotating evenly. So you don't have to remember where you injected last or log it, the app just tells you what site is next. This section also features an extensive knowledge base covering injection methods, site comparisons, IM vs SubQ and more. I'd also recommend switching to Classic mode if you haven't already. It's now the default for all new installs and simplifies the experience significantly. To switch, tap the layers icon top right of the My Protocol screen. The frequency picker was touchy on some devices and has been resolved in V2.6, released yesterday. Please update and let me know if you can get to frequency in less than 20 taps, and without wanting to break your phone. Hopefully that clears things up. Would love for you to give the app another chance and revise the rating if the experience is more intuitive in classic mode.
Really useful
Whttiger25
I find the app incredibly useful for those who may be managing their own TRT. The most useful aspect is the analyst of bloodwork and AI which I find invaluable. Definitely worth the cost.
Developer Response
Really appreciate the kind words. The bloodwork analysis is where the majority of the app's development effort has gone, so it's great to hear it's landing well. Most guys stick to the My Protocol section and never discover it, so you're definitely getting the most out of the app. Thanks for the support!
• Testosterone Cream - Topical testosterone is now fully supported in My Protocol, represented as a Topi-CLICK® dispenser with +/- click buttons to adjust.
• Peptide Reconstitution Calculator - When adding a peptide, you're guided through setting concentration. Enter your vial's dry powder amount and bac water volume calculates automatically. You can override in any direction — adjust bac water to recalculate concentration, or enter a target concentration to recalculate water volume. Unusual concentrations are flagged.
• The Testimator - Significant redesign to simplify data input. Baseline Protocol is now pulled from your Testosterone details in My Protocol, Total Testosterone anchors the model from My Biomarkers, and Blood Test Timing has been added to reflect whether blood was drawn at peak or trough.
• My Bloodwork - A dedicated hub to order the TRT Plus panel, upload results, generate your AI report, and book a consult. Each step is clearly labelled to guide you through the full bloodwork cycle.
• High / Low Indicators - Each biomarker card now shows an H or L when a result falls outside TRT Plus optimised reference ranges.
• Transdermal Pharmacokinetic Models - Cream compounds use two dedicated models for transdermal delivery. Absorbed amount is calculated via a Michaelis-Menten saturation model using site-specific parameters. The Compound Plotter and PTF calculation use a Bateman bi-exponential function, producing an accurate rise-to-peak curve rather than the instantaneous depot model used for injectables.
• Testosterone Cream & Injectable Equivalent Converter - Select a weekly amount and application site to see your injectable equivalent in mg/W, using a Michaelis-Menten model with site-specific absorption ceilings and half-saturation points.
• Protocol Validation - Ensures your compounds and amounts in My Protocol reflect what you were actually taking at the time of bloodwork, before being sent to AI for interpretation.
• Chart Aesthetic Update - Charts and score gauges refined to match the glassmorphic feel of the app. Onboarding hints added.
• Order Bloodwork - Choose between Essential and Comprehensive panels, order via our pathology partners, or use the combined marker list for private ordering or to show your doctor.
• Compound Slots - My Protocol now supports up to 10 compounds, doubled from 5.
• Injection Frequency Science - The Frequency knowledge base now includes a clinical breakdown of why injection interval matters. Steady-state accumulation theory and peak-to-trough data compare protocols from fortnightly to daily. Four cited studies are linked, including Nankin 1987 and the 2025 Walia clinical review.
• E2 & DHT: The Paracrine Picture - New knowledge base section on E2 and DHT. Both are produced locally inside cells — a paracrine process — which is why plasma levels tell only part of the story, and why AIs and 5ARIs act systemically rather than at the symptom site.
• GH Secretagogues & IGF-1 Bloodwork Timing - Three new sections covering how GH secretagogues work, the liver's 4–8 hour GH-to-IGF-1 conversion window, and a compound-by-compound bloodwork timing guide.
• HDL & eGFR Markers - HDL Cholesterol and eGFR are reintroduced as secondary cardiovascular and kidney markers, shown automatically when ApoB or Cystatin C are not detected in your bloodwork.
• Cardio-Metabolic Cascade - The formula behind your personalised testosterone reference range is now documented, showing how your cardiovascular and metabolic markers cascade into your scoring thresholds.
Version 2.7
The developer, Nathan Southern, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Nathan Southern
Size
43 MB
Category
Health & Fitness
Compatibility
Requires iOS 15.1 or later.
iPhone Requires iOS 15.1 or later.
iPad Requires iPadOS 15.1 or later.
iPod touch Requires iOS 15.1 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.