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.
Empowering Men For Over 30 Years...
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. Whopper Pump is the only dual-pump system proven to increase your length and girth in just 20 minutes, 3 times a week.
- 3/4″ inch average reported length gain
- 18% thicker girth
- 12% increase in rigidity
For nearly a decade, the pump I recommend is the Dr. Joel Kaplan pump. I have helped over 20,000 men reverse atrophy, increase their penis size, and get their confidence back.
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.
I dedicated my career to empower men with the best tools to permanently increase penile length and thickness. Most men report gains of 1-3" or 3-8 cm in length and 25% thicker girth.
Numbers Don't lie
The Only Pump Backed by
Over 100,000+ points of Data
What users report in 30 days:
- Get longer and thicker, every single time.
- 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 Set it and Forget it. Automatically keeps the pressure you choose. $159
- The Big "Whopper" Cylinder (Penis + Scrotum) Reaches the buried 30% of the shaft and works the ligament. $89
- Erection Cylinder Fills the shaft for girth and rigidity. $69
- Engorgement Strap Bonus: Wear post-pump for extended engorgement $18
- 3 size erection rings Bonus: Wear during sex to stay harder for longer. $22
- Dual Cylinder Protocol Guided protocol for beginners to advanced users: how long, how often, at what pressure level. $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
$784
You save −$499
Now only$285
Or split it into 4 payments of $71.25
Measure around the base, erect. Pick that number.
75% of men are size M.
30 Day Size swap included.
Take a string or tape measure, and wrap around the thickest part of the erection. (This may be the base, mid-shaft, or head). Where the strings meet is your erect circumference. Between two sizes? Size up.
Or 4 payments of $71.25, with PayPal Credit or Sezzle at checkout.
- 30-day money back
- Free size exchange
- Discreet shipping
30 Days. Results Guaranteed.
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. I want to thank Dr. Kaplan and his team for investing in men.
The one thing
Girth and Rigidity:
It's All in your Plumbing
How thick you get 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.
The Whopper Cylinder
The Only Pump System that
Targets 100% of Your Erection.
For Maximum Results for Girth and Length, You Need to Reach 100% of Your Anatomy.
~30%
Inside your body
~70%
The part you see
A shaft-only pump cylinder
The Auto G.R.O. Whopper cylinder
- About 30% of your shaft is buriedIt's anchored inside your body, behind the base you can see. A shaft-only cylinder seals in front of it.
- The larger "Whopper" cylinder works it from the rootA full inch wider, the larger cylinder seals over penis and scrotum against your body, so the pull starts where the shaft does, inside your body.
- And it works the anchorThe same gentle pull works the suspensory ligament that holds your penis tight to your pelvis. It's the length exercise in Dr. Kaplan's protocol.
¾″
Average reported length gain in 6 months across 11,143 PumpSmart users. Over 32% report a full inch or more. Self-reported; individual results vary.
3.00″
Length
The Whopper Cylinder
Penis + scrotum, used soft. Reaches the buried shaft and works the ligament.
2.00″
Girth + rigidity
The Erection Cylinder
Shaft only, used hard. Fills the chambers past what arousal alone can.
Size Medium shown to scale. In every size, the Whopper Cylinder is a full inch wider.
That bigger cylinder is the "Whopper" in Auto G.R.O. Whopper. Most pumps ship with a single, shaft-only cylinder. Yours comes with both, and one pump head runs them.
How it actually works
20 minutes, 3 x Week
-
Lube the cylinder
A pumping must-have for a good seal and comfort.
-
Big cylinder first, soft: 10 min
Penis and scrotum go into the wider cylinder before you're hard.
-
Erection cylinder, hard: 10 min
Pump with the Erection cylinder while erect or semi-erect for best results. If you cannot achieve an erection, the erection cylinder will induce one for you.
-
Ring or strap
Ring to hold an erection, strap to hold the size between sessions. Both are in the box.
When I first bought the Whopper penis pump, I have to admit, I had my doubts whether it would really work or not.
... 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.
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.
I am just starting week 7 of my pumping with the auto gro whopper and already I have gained more than half an inch of penis girth, .4 inches of head girth, and .2 inches of penis length. I am more than satisfied with the whopper and will continue to use it happily use it so that I can see more gains in my penis so that I can continue to give future partners the height of their pleasure that is possible.....
See it in action
Watch How to Use
Auto G.R.O.
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.
Built from the Ground Up For size
The only Pump that
Grows with You
- Not a One-Size-Fits-AllSized for YOUR measurements to create comfortable suction, while giving you plenty of room to expand and grow.
- Engineered for GrowthNo need to buy a whole new pump when you need to size up. Just get the next cylinder tube and plug it in to your Auto G.R.O. pump.
I’ve been pumping with the Whopper going on 3 months now started in may with a 2.25 cylinder ... now it’s august and I’m moving on to the new cylinder which is the 2.50”. I’m also seeing a change in length too. I love the results will continue to use the pumps.
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 second cylinder for length | Yes | No | No | No |
| Built to Grow-with-You | Yes | No | Less Effective over Time | Temporary Results |
| 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.
It has been several years now since I bought my first pump from you. 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.
Why two cylinders? What does the big one do?
They train different things. The big cylinder goes over your penis and scrotum while you're soft, so it reaches the roughly 30% of the shaft that sits inside your body and works the ligament that anchors it. That's the length exercise. The erection cylinder fits the shaft alone while you're hard and fills the chambers. That's girth and rigidity. A shaft-only pump does only the second one.
Is it safe to put my scrotum in the big cylinder?
Yes. You put it on soft, you choose the pressure, and the pump holds it exactly there. It should feel like an even, warm pull, never a pinch. Start low: most men run it lower than they expect to. If anything feels wrong, one press takes it to zero. It comes in your size, a full inch wider than your erection cylinder, so there is room for both together.
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 ten in the big cylinder, then ten in the erection cylinder. 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.
Can I pay in installments?
Yes. Four payments of $71.25, taken automatically. Same box, same day, same guarantee. PayPal Credit and Sezzle are both available at checkout.
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?
Yes, penis pumps have been used by urologists for decades to improve erection size and quality. It is safety tested and assembled in the U.S.