Digital simplicity.

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  • always-on, sunlight readable display
  • feet/metres setting
  • automatic calibration
  • altitude offset
  • USB-C charging
  • Dimensions: 56x41x12mm
  • Screen: 1.28″ high-contrast LCD
  • battery life: approximately 3 months

Go Digital.

Change between feet and metres – in an analog altimeter, you’ll have to change the face. For the X0, it’s a single button press.

Readability at low altitudes – it’s much easier to read a digital display at low altitudes than reading a small needle deflection.

The X0 is much smaller and lighter than an analog altimeter and presents a reduced snag risk.

Is an arm mount included in the price?


Does it work with polarized sunglasses?

The screen shows some colour bands and shimmering when using polarized sunglasses, but the display is visible.

How did you get the price so low? Should I be worried about reliability?

We reduced the price by not including a lot of features! The X0 will deliver pure, simple altitude awareness.

We haven’t skimped on quality – each X0 is made and tested in our lab in the UK. We’re using our previous experience with altimeters like Brilliant Pebbles and the X2 to identify core functionality and cut away unnecessary features. Fewer features means fewer things that can go wrong.

Finally, we’ve also developed new technologies to lower the cost of making arm mounts.

How many digits does it display?

It displays 3 digits (plus an optional decimal point) in a high-contrast, sunlight readable screen. The numbers are large, clear, and easy to read.

  • Below 1000 (feet or metres) it will display the altitude as 0 to 999.
  • Above 1000 (feet or metres) it will display as 1.00, 1.01, and so on.
  • Above 10000 (feet or metres) it will display as 10.0, 10.1, and so on.

How big are the numbers?

It’s not the size, but how you use it! 😉 While the X0’s numbers are comparable in size to other entry-level altimeters on the market (approximately 12mm high) the numbers are much easier to read because:

  • the screen is very high contrast
  • the high-resolution font we use is easier to read than a seven-segment LCD font.

Does it log your jumps?

No, there is no logging function. X0 is designed to be as simple as possible to use.

Is it waterproof?

No, the X0 is not waterproof.

How do I change between feet and metres?

Simply use a straightened paperclip or the included pin to press the hole labeled ft/m. The unit setting only needs to be done once and the device will remember this until it is changed again.

Does it have a backlight?

No, it does not have a backlight.

Does it have bluetooth?

No, the X0 does not have bluetooth.

Does it have altitude offset?

Yes. You can change the offset in increments of 100 feet (or 30.5 metres) using the rear pin holes.

Does it come in any other colour?

The X0 itself comes only in black. We are working to make different coloured arm mounts available soon!

  • X0 spare arm mount

    Spare elastic arm mount for the X0.

    £10.00Add to bag