11 of 12men reported improved length, and all reported more rigidity
Improved length, and every man firmer
Eleven of 12 described improved length, and all reported increased rigidity and patient/partner satisfaction.
Trusted By Over 100,000 Men
The Numbers Are In: The Auto G.R.O. is a Game Changer
11,000+ Men Tracked Their Results.
92% Got Bigger.
The Auto G.R.O. Pump puts that data-backed protocol in your hands, helping you train your penis to hold more blood, produce harder erections, and build measurable size in just 20 minutes, three times a week.
- 3/4″ inch average reported length gain
- 18% thicker girth
- 12% increase in rigidity
[Expert quote]
Data Driven Results
The Only Pump Built On
Measured Results
Every other pump is sold on opinion. Ours is the only one with a protocol written from what actually happened to men who used it, logged session by session in our own app. These are their numbers, not ours.
- 92% report positive growth
- ¾" average length gain in 6 months
- 18% average girth/thickness gain in 6 months
- 11,143 men logging, across 66,564 recorded sessions
Change in erect length
Average reported gain 1.9 cm, about ¾ of an inch.
Change in erect thickness
Measured at the head and the shaft. Average reported gain 18%.
Over 65% gained at least half an inch. Over 32% gained at least a full inch.
Steady Growth Week over Week
Self-reported data from PumpSmart users, January 2026. Individual results vary.
[Expert quote]
Numbers Don't lie
The Only Pump Backed by
Over 100,000+ points of Data
What users report in 30 days:
- Gains in both girth and length as vascularity and tissue rebuild.
- Rock-hard erections with more blood-carrying capacity.
- Fuller and larger flaccid, not just erect.
- Feel more, and more in control with restored blood flow to your nerves.
- Reversed atrophy and shrinkage that comes with age, ED, and low circulation.
- What's Included:
- Auto G.R.O. Pump Motorised and hands-free. You set the pressure, it holds it. $249
- Engorgement Strap Holds the size between sessions. $18
- 3 size erection rings Keeps the blood where you just put it. Three sizes, so one fits from day one. $60
- The Protocol The do-this map: how long, how often, what to expect each week. $129
- PumpSmart app access, free for life Logs every session so you can see it working instead of guessing. $99/year
- Lifetime Male Performance Coaching A real person to ask, by phone, email or chat, for as long as you own it. $199
Total value
$754
You save $555
Measure around the base, erect. Pick that number.
Most men take M, and it is already selected.
30 Day Size swap included.
Measure girth at the base while erect, with a soft tape or a piece of string you then lay flat. Under 4.5" take S. 4.5" to 5.25" take M. 5.25" to 6" take L. Over 6" take XL. Between two sizes, size up: a cylinder with a little room works and a tight one does not.
Only $199
One payment. Nothing renews, nothing bills again.
Send me the Auto GRO- 30-day money back
- Free size exchange
- Discreet shipping
Thirty days. My risk, not yours.
Includes a 30-Day Money Back Guarantee.
After my 1st week of pumping coming out of the shower... my wife said, "it looks so defined....like if you've been working it out." Then at the beginning of my 3rd week my wife said, "there's a big bulge through your pants... pull it out." As i did she couldn't keep her hands off it... squeezed it, and kept repeating... "it looks so muscular, so healthy, so thick... keep it up!" If this happened only after a couple of weeks of pumping I can't wait to see in a couple of months.
What happens, and when
Results You Can
Actually See
- Day 1
- Immediately harder and firmer
- Thicker and fuller
- Overall erection size increase
- Temporary results
- Day 14
- Harder morning wood
- Easier and faster to get hard
- Slightly fuller and thicker
- Starting to maintain gains
- Day 28
- Noticeably thicker erections
- Bigger, even when soft
- Noticeable permanent gains, mostly in girth
- Month 3
- Noticeable permanent gains, in girth and length
- Permanent increase in thickness by up to 10%
- Reverse in atrophy
- Regaining size and rigidity lost to aging and shrinkage
- Month 6
- Drastic change in sexual confidence and frequency
- Significant increase in length, by up to 15%
- Up to 20% thicker girth reported
- Fuller and larger, even flaccid
- Month 7-12
- 1 to 3 inches in length
- Up to 25% thicker girth
- Rock-hard erections
- Confidence in and out of the bedroom
Individual results vary.
The one thing
Size and Rigidity:
It's All in your Plumbing
How big you are and how hard you get comes down to one thing: Capacity. It's how much blood you can hold down there.
And that capacity declines with age. The Good News? Capacity is trainable.
- Pressure draws blood inMore than your own arousal can pull on its own.
- The chambers stretch to hold itThe tissue is elastic. Fill it repeatedly and holding more becomes its normal.
- The plumbing builds to supply itBlood flow follows demand. Ask for more, often enough, and the supply grows to match.
I noticed after the first workout that my flaccid penis hangs out longer and girthier than usual. It's like the pump gave my penis a tune-up. Blood now flows easily into my penis without effort from a Kegel. simply a sexual thought crosse's my mind and blood begins to fill giving me a chubby. After My second workout session I'm noticing slightly more girth improvements.
How it actually works
20 minutes, 3 x Week
-
Lube the cylinder
Around the rim, not inside. This is the difference between a seal that holds and one that slips.
-
Press start and watch
You set the pressure and the pump holds it exactly there. It cannot run away from you the way a hand pump can, and one press takes it back to zero at any second.
-
Ring or strap
Ring to hold an erection, strap to hold the size between sessions. Both are in the box.
See it in action
Watch How to Use
Auto G.R.O.
... After the first few months I notice a difference in girth. My wife did also. Now after nine months, there is definitely a difference in both length and girth.
I am happy I purchased this product and would encourage anyone looking to enhance their sex life, self confidence and make their companion happy, to do the same. Get started, get your partner involved and have some fun.
By the way, im a young 65, my wife is 54.
The alternatives
It's a No-Brainer
How Auto G.R.O. Compares
Swipe to compare
| Auto GRO | Other pumps | Pills | Fillers | |
|---|---|---|---|---|
| Proven Results - Backed by Data | Yes | No | Yes | Adds volume, not function |
| A protocol written from users' own logged data | 66,564 sessions | No | No | No |
| Builds capacity that lasts | Yes | Sometimes | No | Adds volume, not function |
| Address the Root Cause | Yes | Yes | No - Only Masks the Symptoms | No |
| Someone to ask when you are unsure | Free Lifetime Coaching | No | Doctor Appointment Required | Doctor Appointment Required |
| Doctor Intervention | No | No | Yes - prescription | Yes - clinical visit |
| Total Cost | $$ | $ | $$$ - Every month, forever | $$$$ - Thousands every time |
I have had difficulties with faltering erections. There has been a gradual reduction in size especially, which my partner was reluctant to bring up but she says has been noticeable. I received my pump a week ago, and have had 3 sessions as recommended...
Since then, girth has started to return to former levels, and erections are “fuller”. They have also lasted longer, That already had much approval and encouragement to continue! Orgasm has been more pleasurable for me, and more noticeable to the Boss...
Thank you for overcoming my scepticism, and your enthusiasm for what you do.
The published research
Peer Reviewed. Placebo Controlled.
Proven for Decades.
Prevent Shrinkage. Reverse Atrophy. Improved Erection Scores. Tissue Expansion. No side-effects.
77%reported better rigidity and sexual satisfaction
Better rigidity, in more than three men in four
Twenty-four patients (77%) reported improved penile rigidity and sexual satisfaction.
Raina et al., International Journal of Impotence Research, 2005;17(3):258-262
89%produced an erection with the vacuum device
Nine men in ten produced an erection
The vacuum device was effective in producing erections in 89% of the men.
+1.5 cmgreater total penile length in the treatment group
A longer penis, measured
In the treatment group, we obtained a longer total penile length: median +1.5 cm.
+0.8 cmof stretched length gained with the device
Length gained, not just held
VED patients gained approximately 0.8 cm SPL.
55%more oxygen into the tissue, from a single session
It floods the tissue with blood
An initial increase of 55% was seen in corporal oxygenation with VED use.
Welliver RC Jr, et al., Journal of Sexual Medicine, 2014;11(4):1071-7
Published research on vacuum erection devices. Study designs and populations vary; follow any link to read the source.
Not only has it given my girth but length as well. Most of all Confidence. And you know women prefer a man that is confident in bed. My wife loves every inch. And my c*ck is a swinging man tool when it is not in use - thank you!.
Before you decide
Questions Men
Actually Ask
How much bigger and harder can I get?
Based on our data, average gains are 3/4" in length and 18% thicker girth. Individual results may vary.
When will I see results?
You will see results the very first time you pump. Long term gains will compound over time. You can expect to see significant gains within 30 days.
Does it hurt?
No. You set the pressure yourself and you can take it to zero with one press at any second. It is a firm, warm pull. If it ever stops feeling good you have gone too high, and the fix is one button. Most men run it lower than they expect to.
How long does it take?
Twenty minutes, three times a week. About an hour a week in total. You are sitting down for all of it and the machine is doing the work.
Is it noisy?
No. It is quieter than an electric toothbrush and considerably quieter than any hand pump, which squeak. In a normal house, in a normal room, with a door closed, nobody hears anything.
How fast will I actually see something?
The first session. You will look at twenty minutes and it will be visibly different, and that is hydraulics, not a promise. What repeat sessions build underneath takes longer and shows up in weeks, not nights. You get the short answer the first night and the long one over the month.
What if I order the wrong size?
We swap it free inside thirty days and you do not have to explain anything. Medium fits most men and it is selected by default. If you are between two sizes, go up: a cylinder with a little room works and a tight one does not.
Is this like taking a pill?
No. A pill borrows you an erection for a few hours using chemistry and changes nothing underneath, which is why it works again next time only if you take it again. This physically moves more blood in, repeatedly, and your body adapts to what you repeat. Nothing to swallow and nothing to renew.
What if it does not work for me?
Email one line inside thirty days and I refund you. There is no form, no return interview and no attempt to talk you out of it. I would rather have a clean refund than a man who feels he got caught.
Is this safe to use?
It is the same category of device urologists use in clinical rehabilitation after prostate surgery, which is where most of the published research on it comes from. You control the pressure and you can stop it instantly. The instructions are in the box and in the Protocol, and coaching is free and permanent if you want a person to ask.
