The head stuff and the habits, explained straight.
How sleep, drinking, training and stress actually play into how you feel and function, and where erections fit into the picture. Written to inform, not to scare. Education, never diagnosis.
What the research actually says
Does drinking actually lower your testosterone?
A drink or two does very little. A heavy night is different, and it shows up in bed the same night, long before it shows up in any blood test.
How much does sleep really affect your testosterone?
In one controlled study, a week of short sleep lowered daytime testosterone in healthy young men by 10 to 15 percent. Erections are maintained at night too.
Does lifting actually raise your testosterone?
A hard session spikes testosterone for about an hour. The payoff that matters for readiness is slower, steadier, and strongest for the men starting furthest back.
How stress quietly moves your numbers
The hormone route is slow. The nervous-system route is same-day, and it is the mechanism behind a lot of performance anxiety.
Is a flat, low-drive phase in your 30s normal?
After 30, testosterone drifts down by roughly one percent a year. Real, but slow. A sharp change in drive does not add up to age on its own.
Straight answers, no hedging
Is STAMNR a medical device?
No. STAMNR is a training and education tool. Your Firmness score is a readiness index built from what you log, morning and evening - it does not diagnose, treat or predict any condition, and it is never a prediction about how tonight will go. For anything clinical, speak to a doctor.
Can an app measure my testosterone?
No app can read your hormones from your phone, and STAMNR does not claim to. A blood test ordered by a clinician is the only way to measure an actual hormone level. STAMNR is about the daily habits research links with how you feel and function, and about seeing your own pattern, not your bloodwork.
What is the Firmness score?
One calm number with a plain word attached, from Base camp up to Peak. It is a readiness index: a reading of how well your last 24 hours - sleep, energy, training, drinks, nicotine, stress, and how things actually went - set you up. It moves on what you log and on nothing else, and it is never a prediction, a probability or a promise about tonight.
Do sleep, drinking and stress really affect this stuff?
Yes, and the research is fairly settled. The size of the effect depends on the pattern rather than any one-off day, which is exactly why tracking the pattern tells you more than reacting to a single rough night.
Where does STAMNR fit if I have erection problems?
Alongside care, not instead of it. STAMNR is not therapy or medical treatment, and it is not intended to cure, treat or diagnose any condition, including erectile dysfunction. It can sit alongside care from a GP or therapist. If erection problems are new, persistent or worrying you, talk to a GP first and rule out physical causes - that check is not something an app can do.
Is my data private?
Yes. Your logs are private to your account, and nobody else using STAMNR can see them. We do not sell your data, there is no advertising, and there are no third-party analytics or tracking tools in the app. Sensitive logs are processed only with your explicit consent, which you can withdraw at any time, and you can delete your account and its data whenever you want.
The full detail is in the Privacy Policy. Questions go to [email protected].
Do I need an Apple Watch or wearable to use STAMNR?
No. The whole log takes about two minutes a day by hand. Connect Apple Health and STAMNR can fill in compatible data like sleep and workouts automatically, so that is less to enter. No wearable required.
Is STAMNR a testosterone booster?
No. STAMNR does not change your hormones and does not claim to. It helps you log the habits that matter, see how your own weeks line up, and train the head side with short daily practice. Anything promising to boost or restore testosterone is making a very different kind of claim than we are.
How long before the score means anything?
You get a reading from day one, anchored to the baseline you set during onboarding. A week or two of logs gives you a pattern, and the pattern is the useful part. When the app has not seen enough of your data to say something true, it says it is still gathering rather than inventing an insight.
Who is STAMNR for?
Men 18 and over who want to understand how their daily habits line up with how they feel and perform, without judgement and without the fear-selling this space is known for. You do not need a problem to want to understand yourself.
Does STAMNR replace seeing a doctor?
No. STAMNR is for understanding your own patterns, never for diagnosing anything. If something feels off, or a change is sharp or persistent, that is a conversation for a GP, and ruling out physical causes is the right first step.
Can I use it if I don't drink, or don't train?
Yes. Log what is relevant to you. An input that does not apply to your life simply is not part of your picture, and the app never nags you about it.
STAMNR is not a medical device. It does not diagnose, treat or predict any condition.