The study that decides this category

Constriction rings are sold almost entirely on claims, because almost none have been studied. FirmTech is the exception, and not because the company ran a trial on itself — because independent researchers ran a randomised survey study comparing two medical-grade penile constriction devices head to head and presented it to the sexual medicine literature.

Randomised comparison of two medical-grade constriction devices
OutcomeFirmTechEddie by Giddy
Would recommend the device79.6%53.1%
Significancep = 0.0026—
ComfortSignificantly preferred—
AdjustabilitySignificantly preferred—
StretchSignificantly preferred—
Firmness in men with ED (separate analysis)—Suggested advantage
Both devices had usability issues in the study. The firmness signal in the ED subgroup is the one result favouring the competitor, and if firmness is your only concern it is worth weighing.

A preference study is not an efficacy trial, and it should not be oversold. What it measures is whether men will keep using the thing — and in this category that is close to the whole game. Constriction works when it is worn; the failure mode is a device sitting in a drawer because it pinches, will not come off, or was the wrong size. Winning on comfort, adjustability and stretch is winning on the thing that predicts whether you get any benefit at all.

The Tech Ring: measurement, and what it is for

The Tech Ring is the only product in this file that does something other than apply pressure. It carries sensors and pairs with a phone, and it records how firm you get, how long an erection lasts, and how many you have — including while you are asleep.

That sounds like a novelty. It is not, and the reason is worth understanding. Healthy men have several erections during REM sleep every night, entirely involuntarily. Those nocturnal erections require the same vascular and nerve function as any other. So if a man cannot get an erection with a partner but is getting firm ones in his sleep, the hardware is working and the problem is somewhere else — anxiety, relationship, situational, medication timing. If he is getting neither, that points towards a physical cause worth investigating.

Used properly, though, the data answers a question men spend years guessing at. If you have been told 'it is probably stress' and never believed it, a fortnight of nocturnal readings is a far better conversation-opener with a doctor than another description of how you feel. See our guide on talking to your doctor.

The privacy question, taken seriously

We score privacy at 15% of the composite on every review, and this is the one product where it drove the score down rather than sitting quietly in the background. A ring with an app produces a timestamped log of your sexual function. There is no dataset in this entire category that is more sensitive.

  • Read the privacy policy before pairing, not after. Specifically: what is stored, where, for how long, and whether anything is shared with third parties or analytics providers.
  • Check whether the device works without the app, and whether data can be kept on-device only.
  • Check what happens to your history if you delete the account — and whether deletion is actually offered.
  • Assume anything synced to a server can be subject to a breach, because that is true of every service.
  • If the data is not going to change what you do, consider buying the non-electronic ring instead. You lose the graphs and nothing else.

None of this is an accusation against FirmTech, and we found no regulatory action against it. It is a statement about the category: the moment a product measures you, the question changes from 'does it work' to 'who else can see it', and that question deserves five minutes before you pair the device rather than after.

Which FirmTech to buy

Buy the Performance Ring or Max PR
If you already know constriction helps you and you just want the best-executed version. You get the adjustability that won the head-to-head, without the electronics, the charging, the app or the data question — at a fraction of the Tech Ring's price. For most men reading this, it is the right purchase.
Buy the Tech Ring
If the open question is *why* — whether this is physical or in your head, whether the medication you started is doing anything, whether it is worse on particular nights. Then you are not buying a ring for $275, you are buying two weeks of data that would otherwise require a clinic. Only worth it if you will act on what it shows.
Buy neither
If you cannot achieve an erection at all. Rings hold; they do not create. A vacuum device produces an erection mechanically and then uses a ring to keep it, and that combination is what the guidelines describe for this situation.
Products

Reviewed individually

FirmTech sells several different things, and they are not equivalent — some are FDA-approved generics, some are brand-name originals, and some are compounded formulations that have not been through FDA review. Each is reviewed separately, with the retail price of the same molecule shown alongside.

FAQ

Frequently asked questions

Is FirmTech better than Eddie by Giddy?
In the only published randomised comparison, yes — 79.6% of participants would recommend FirmTech against 53.1% for Eddie, driven by comfort, adjustability and stretch. A separate analysis suggested Eddie may have an edge on firmness specifically in men with ED. If comfort and staying-power of the habit matter most, FirmTech. If raw firmness is the only thing you care about, it is closer than the headline suggests.
What does the Tech Ring actually measure?
Erection firmness, duration and frequency, including overnight. The clinically interesting part is the nocturnal data: healthy men have several erections during REM sleep, so their presence or absence helps separate a physical cause from a situational one.
Can the Tech Ring diagnose my ED?
No. FirmTech's devices are FDA-registered rather than cleared, and no diagnostic claim has been authorised. Consumer sensor data is not a validated clinical test. It is genuinely useful as something to take to a doctor, and it is not a substitute for being assessed.
Is the app data private?
Read the policy before you pair the device. This is the most sensitive dataset of any product we review, and consumer health apps generally fall outside HIPAA — the protections most people assume apply usually do not. If you do not need the data, the non-electronic rings do the mechanical job without generating any.
How long can I wear a FirmTech ring?
Thirty minutes maximum, like every constriction device from every brand. Longer restricts blood flow the tissue needs. Check the manufacturer's own guidance carefully before any overnight use of a wearable.
Is it safe with nitrates?
Yes — there is no drug involved, so the contraindication that rules out every PDE5 inhibitor does not apply. Constriction rings and vacuum devices are the main options for men on nitrate therapy for angina.
How much does FirmTech cost?
The Tech Ring is around $275. The non-electronic Max PR and Performance Ring cost substantially less. All are one-off purchases with no subscription.
Will it work if I cannot get an erection at all?
No. A ring keeps an erection you already have — it cannot produce one. If getting started is the problem, look at a vacuum device, medication, or both together.
Sources

What this is based on

We link to primary sources — clinical guidelines, regulator publications and peer-reviewed research — wherever possible. Links open on third-party sites we do not control.

  1. [01]U.S. Food and Drug Administration. Device registration and listing — what it does and does not mean.
  2. [02]American Urological Association. Erectile Dysfunction: AUA Guideline (2018).
  3. [03]National Library of Medicine. PubMed — search the primary literature.
  4. [04]Urology Care Foundation. What is Erectile Dysfunction?.
  5. [05]Federal Trade Commission. Health Products Compliance Guidance.