As long as they are pressurised, Airmaster works with them. The pressure‑restoration principle applies regardless of colour, so feel free to use them.

No worries at all – in fact, it's even better! The chamber is extremely airtight and can maintain pressure for up to three weeks. The balls stay under high‑pressure conditioning the whole time; the longer they stay, the more fully they recover. When you remember, just take them out – they'll perform even better than if you'd only left them overnight. Just don't forget them completely (ha!).

We don't recommend mixing them. Tennis and padel balls require different chamber pressures, so mixing them would prevent either type from achieving optimal recovery. Our advice: Use one cycle for tennis balls, and the next for padel balls – switch modes via the app. If you play both frequently, many of our users buy two Airmasters – one dedicated to tennis, the other to padel – so each does its job perfectly. A single device supports both types, but just don't mix them in the same batch.

No brand restrictions at all. Wilson, Head, Babolat, Dunlop, Penn, Slazenger – as long as they are standard pressurised tennis or padel balls, Airmaster is fully compatible. Our pressurisation principle is based on universal physical permeation, not on brand or model. So you can keep buying whatever brand you prefer – Airmaster will take care of extending their life.

Thank you for your support and honest feedback – this is a very practical question, and we’ve debated it internally many times. You’re right: most tennis ball tubes on the market come with 4 balls. In fact, our early prototype was also a 4‑ball version. However, after extensive real‑world testing, we found that: The 4‑ball tube was noticeably bulkier, making it less convenient to fit into bags or pockets – especially for players who prefer to travel light. Portability suffered – many testers felt the 4‑ball tube was slightly too large when held in hand or slipped into a side pocket. We decided to perfect the 3‑ball version first – ensuring excellent sealing, pressure resistance, and ease of use – and then iterate to a 4‑ball version based on your real feedback. We fully understand your concern about “wasting one ball.” In practice, many players carry 3 balls at a time (common for training or casual matches). If you’re used to having 4 balls as a set, here’s a workaround: Put 3 of the 4 balls into our pressure tube, and keep the remaining ball in its original container for later use. If you have two 3‑ball tubes, you can pressurise 6 balls at once – which is actually more flexible than a single 4‑ball tube. Whether you need 3, 4, 6, or more balls, you can mix and match without waste. That said, we are considering a 4‑ball version in the future. But for now, we want to make the 3‑ball version rock‑solid and reliable. Thank you again for supporting us – every piece of feedback you give goes directly into our development list! 🎾

Yes – currently we offer the 3‑ball version. In the next generation, we plan to release a 4‑ball version. The first version prioritised size and portability. Our current VIP price is very attractive, so you might want to give it a try. Of course, if you need an even larger capacity, feel free to tell us how many balls you’d expect per batch – we’ll take your suggestions into account for future development.