Image source: Hydrogen Sports

Smartphone controlled portable tennis machine Proton hits retail availability

Bay Area startup Hydrogen Sports has announced they have fulfilled all pre-order sales of their portable tennis ball machine Proton. They now have a limited supply for retail availability.

What makes this machine unique is that it is compact and smart phone controlled. We first wrote about it nearly two years ago. At the time the plan was to complete initial manufacturing a year later. But it has taken them double that time to achieve this goal.

Proton is a smartphone controlled portable tennis machine
Image source: Hydrogen Sports

Some five years in the making, Proton is about half the size of a standard tennis ball machine (15” x 17” x 9”). You could probably equate its size to a small carry-on suitcase. The thing is also very lightweight, coming in at just 8 kilograms, and that’s with the battery.

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Proton can fling balls in your direction at speeds of up to 70 mph and maximum spin of 3000 rpm which is right up there with fully sized machines. The ball capacity is 100 tennis balls.

Apart from the small size, the most novel aspect of Proton are its smart controls. You can use the accompanying smartphone app to specify the spin, speed, location and timing of shots. Or tap where you want the ball to go and let the app’s proprietary algorithms do the rest.

There are also multiple built-in practice routines. This includes everything from footwork to stroke development and game situations.

“After leaving Apple four years ago, I bought a ball machine to work on my game and was disappointed in how primitive and heavy the machines were,” said Jonah Harley, founder and CEO of Hydrogen Sports when the product was announced in 2019.

“Technology has advanced so much since these machines were designed in the 1980s, especially in motors, batteries and our access to smartphones. Leveraging state of the art technology, we were able to design a machine from the ground up that dramatically improves the experience and portability of the tennis ball machine.”

The machine has a few similarities with Slinger, a portable tennis ball launcher that takes the shape of a tennis bag. The gizmo raised over $1.6 million on Kickstarter and Indiegogo a few years ago. That one has been on the market for a while now. In our review in 2020, we found that Slinger works well, it looks great, you can fit a lot of tennis balls inside and you can customize everything to your level of play.

Proton is a smartphone controlled portable tennis machine
Image source: Hydrogen Sports

Proton and Slinger weight about the same and are similarly sized so are both portable. But Slinger can only achieve speeds of up to 45mph and lacks the sophisticated smartphone app controls. It is much cheaper, though, and looks better.

For now Proton is only available in the contiguous United States. The outfit will be adding more machines weekly for the next 2-3 weeks. At the end of November a larger shipment is expected.

One of these will set you back $1,595 on This might seem like a lot (and it is), but it’s actually less than half the price of fully sized ball machines. As mentioned, you can check out Slinger which does much of the same but is about half the price.

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Dusan Johnson

Dusan is our dedicated sports editor which means he gets to indulge his two passions: writing and gadgets. He never leaves his house without a minimum of two wearable devices to monitor his every move.

One thought on “Smartphone controlled portable tennis machine Proton hits retail availability

  • Does the proton have a wheel on it? Can I use my android phone with it?


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