The #1 app to track your TRT protocol
See your levels between blood draws.
Axis uses pharmacokinetic modeling to estimate your testosterone levels in real-time. Log injections in seconds, track symptoms, and see how your protocol actually performs. Also supports female HRT with estradiol and multi-compound protocols.
Free to use · No account needed · All data stays on your device
Everything you need to understand your protocol.
Axis was built for TRT patients who want to see what happens between blood draws. Real pharmacokinetics, not guesswork.
PK-Modeled Levels
See your estimated testosterone curve between blood draws. Built on peer-reviewed pharmacokinetic research, refined with your own bloodwork.
3-Second Injection Logging
One tap to log. Axis remembers your compound, dose, site, and schedule. Supports multi-compound protocols with HCG, AIs, and ancillaries.
Symptom Tracking & Insights
Daily check-ins for energy, mood, sleep, libido, focus, and anxiety — correlated with your estimated levels to reveal patterns your provider can act on.
Built for patients who want to understand their protocol.
Every feature is designed around real therapy workflows — from injection day to lab day and everything in between.
Multi-compound protocols
Testosterone esters, HCG, anastrozole, SERMs — manage your full stack in one place. Also supports estradiol and progesterone for female HRT.
Lab calibration
Enter bloodwork results and Axis adjusts your model to match your actual metabolism. Estimates improve with every lab.
Male & female support
Sex-aware reference ranges, dose presets, and compound selections. Full support for both testosterone replacement and female hormone therapy.
Privacy-first
All data stays on your device. No accounts, no cloud, no tracking. Your protocol is yours alone.
Protocol history
Track changes over time. Compare how different protocols affected your levels and symptoms.
Explore mode
Simulate "what-if" scenarios — try different esters, doses, and frequencies before committing.
Start understanding your protocol today.
Axis is free to use. Set up takes about 60 seconds — just enter your compound, dose, and frequency.
No account needed · All data stays on device
Trusted by patients who want real data.
From the community that's been asking for this since day one.
Frequently asked questions
If you have anything else you want to ask, reach out to us.
How accurate are the estimated levels?
Without calibration, estimates reflect population-based averages grounded in peer-reviewed research. After entering bloodwork, the model adapts to your individual metabolism — many users see estimates within 5–15% of actual labs.
Is this a medical device?
No. Axis is an informational tracking tool, not a medical device. It provides estimates for educational purposes only. Always consult your prescribing physician before making changes to your protocol.
What compounds does Axis support?
All major testosterone esters — Cypionate, Enanthate, Propionate, Undecanoate — plus blends like Sustanon 250, topicals (gels, creams), pellets, and nasal formulations. For female HRT: estradiol (patch, gel, oral, pellet), progesterone, and ancillaries like anastrozole.
Where is my data stored?
All data stays on your device in a local database. There are no accounts, no cloud sync, and no analytics tracking. We never see your protocol, labs, or symptoms.
Does Axis support female HRT?
Yes. Axis includes sex-specific reference ranges, female dose presets, estradiol and progesterone compound support, menopausal status configuration, and menstrual cycle phase tracking for premenopausal users.
What is lab calibration?
When you enter bloodwork (e.g., Total T at a known time after dosing), Axis adjusts internal model parameters to match your individual response. This makes all future estimates more accurate for your specific metabolism.
Is Axis free?
Axis is completely free to use. We may add premium features in the future, but core tracking and level estimation will always be available at no cost.
What routes of administration are supported?
Intramuscular (IM), subcutaneous (SubQ), topical (gel, cream — including scrotal), oral, subdermal pellet implants, and nasal gel. Each route uses appropriate modeling for its absorption profile.
Can I export my data?
Yes. You can export your injection history, symptom logs, and lab results as a PDF report or CSV — useful for sharing with your healthcare provider or keeping personal records.