The enhanced athlete's framework. Finally in an app.
At a glance: a protocol planner built to replace your spreadsheets and notes.
Under the hood: a full hormone optimization platform with AI-powered bloodwork analysis, advanced pharmacokinetic modeling, and a knowledge base covering everything from TRT fundamentals to peptides and advanced enhanced protocols.
See the full framework at trtplus.app
NOT A LOGGING APP. A COMPLETE FRAMEWORK.
From ordering the right bloodwork through TRT Plus pathology partners, to interpreting your results, dialing in with the Testimator™, and adjusting your protocol — every feature exists to close that loop.
Order → Interpret → Dial In → Adjust → Repeat.
MY PROTOCOL
— Daily Dashboard: your full schedule at a glance — checkboxes, visual syringe, injection stacking
— 80+ pre-configured compounds: anabolics, TRT ancillaries, peptides, GLPs, SARMs — one tap to add
— Dose Titration: set automatic ramping and tapering plans for any compound
— Peptide reconstitution calculator — enter dry powder, bac water calculates automatically
— Pharmacokinetic charting: the only TRT app with a true multi-route PK model — injectables, orals, peptides, and testosterone cream
— Peak-to-trough T level fluctuation modeling based on your exact protocol — see the swing, not just the average
— Rotation Planner: set your sites once, the app forecasts the sequence
— Testosterone cream with Topi-CLICK® interface and site-specific absorption modeling
— Inventory management with advance reorder notifications
— Classic mode for straightforward TRT. Advanced mode for the full enhanced stack.
MY BLOODWORK
— Automated OCR scanning — upload any photo or screenshot, markers extract automatically
— Enhanced reference ranges calibrated for TRT and enhanced athletes, not the general population
— Reference ranges that move with your health — the Cardio-Metabolic Cascade feeds your cardiovascular markers into a personalized testosterone ceiling
— Hormonal balance scored against your true androgenic load using exclusive DHT receptor potency and paracrine amplification model
— Biomarker Score: a weighted composite across 15 markers — hormones, cardiovascular, liver, kidney, hematology
— Free T via four methods: Vermeulen, Mazer, Södergård, and Zakharov — exclusive to TRT Plus, and the only model accurate at supra-physiological levels
— AI Bloodwork Report: 8 sections interpreting your results alongside your active protocol in context
— Pathology partner integration for athlete-specific panels: ApoB, Cystatin C, GGT (region dependent)
THE TESTIMATOR™
Predict your testosterone response across any protocol before you run it — anchored to your actual bloodwork, not a population average. Understand the shape of your response.
KNOWLEDGE BASE
100+ topics across 15 categories. 100+ studies cited. Zero generic AI content. Every biomarker and recommendation covered with the depth for someone actually running a protocol.
THE BUILD
Built by an application engineer with 25 years of experience — and on TRT — in collaboration with TRT clinics, coaches, and pathology partners. Grounded in de-identified data from thousands of real-world TRT patient results. Not a general health app retrofitted. Built from the ground up for this population.
Charted Top 3 in App Store Health & Fitness — #1 TRT app by the chart, not by the claim.
ONE-TIME PURCHASE. NO SUBSCRIPTION.
TRT is generally for life — a recurring charge for something you manage indefinitely didn't feel right.
Not sure if it fits your needs? The App Store supports refund requests after purchase. Buy it, explore it fully, and if it's not right for you, request a refund. We don't get many.
Full feature breakdown, screenshots, and the engine behind it all: trtplus.app
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!
• Dose Titration - Ramping and tapering plans can now be set for any compound. Define a target, timeframe, and adjustment frequency — the app builds a dated week-by-week plan and automatically adjusts on schedule. Re-open the plan at any time to see completed, current, and upcoming steps. Community requested.
• Today Progress Bar - A live dose tracker showing how many compounds have been taken and how many remain, with a progress bar that fills as you go.
• Engine Schematic - The My Biomarkers knowledge base now includes a visual map of the full scoring engine, showing how each biomarker feeds into and relates to the others across the cardiovascular, hormonal, and metabolic systems.
• Compound Detail Strip - A live inventory countdown shows days remaining with color-coded urgency, and active Ramping or Tapering plans are summarized at a glance at the bottom of each compound card.
• Nebido Support - Testosterone Undecanoate is now fully supported. Long-interval dosing from Every 3 to Every 16 Weeks is available exclusively when Nebido is selected. The fluctuation chart and Testimator both use a calibrated depot absorption model — levels rise to peak at day 7 post-injection and the Testimator timeline expands to 14 weeks to give a meaningful view of the full dosing cycle. A 5 mL syringe is set to hold the 4 mL standard volume. Community requested.
• Titration Forecasting - Dose titration schedules are now visible on compound charts, showing your planned ramping or tapering steps, target achievement date, and elimination timeline in one integrated view.
• HDL & LDL Markers - LDL Cholesterol replaces HDL as the secondary cardiovascular marker, displayed automatically when superior marker ApoB is not present in your bloodwork.
• Compound Database Updates - Dutasteride added to Advanced, BPC + TB-500 and CJC + Ipamorelin blend entries added to Peptides. Community requested.
Version 2.8
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
43.9 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.