Aspetto.

Spearfishing and freediving · Apple Watch Ultra

Wait still.
Hunt smart.

Aspetto shows you the seabed before you get wet, keeps an eye on you from your wrist while you dive, and remembers what you found.

iPhone and Apple Watch Ultra. Seabed surveys from Dodman Point to Whitsand Bay, more coming.

The Aspetto map on iPhone: shaded seabed relief off Looe, with tide, current and moon readouts at the top Aspetto on Apple Watch Ultra: an arrow pointing to a saved spot, 355 m away, on course

How it works

Plan it. Dive it. Remember it.

Plan where to go

Shaded 1–2 m seabed surveys show reef edges, gullies and sand. Pick what you're after and Aspetto suggests ground that suits it, with the tide added to the charted depth.

Dive with the watch watching you

The watch logs each dive, points you to your spots, shows the seabed offline and asks "You OK?" after every dive. It all works with the crown and Action button, so Water Lock is no problem.

Remember what you found

Mark a spot with one press. Your dives, spots and the vis you logged sync to your iPhone and the web app, so next time you go straight back.

Seabed maps

See the reef before you get wet

Most maps show the inshore seabed as a smooth blue blur. Aspetto shades the UK Hydrographic Office's 1–2 m surveys, so you can see where the reef drops to sand, where the gullies run and where it's flat.

About the maps
The same stretch of seabed off Hannafore: blurred at 115 m resolution on the left, sharp reef and gullies from the 1 m UKHO survey on the right
Off Hannafore, Looe. Left: EMODnet, about 115 m per cell. Right: UKHO survey, about 1 m.

Honest about the limits

A tool for your planning. Not your buddy.

Aspetto is a backup, not a buddy. Spearfishers and freedivers check things, so here's what it can't do.

  • It isn't a dive computer. The watch reads depth to 6 m, and it doesn't do decompression.
  • The charts aren't for navigation. Surveys can be old or wrong, especially close inshore.
  • The SOS can't reach anyone while you're underwater, and help can't get to you within the minute or two a blackout allows. Dive with a buddy: one up, one down.
Safety and limits
The watch check-in screen: YOU OK? with a 26 second countdown, turn the crown or press the Action button

Beta

Help us test it in the water

We're opening a TestFlight beta for iPhone and Apple Watch Ultra. It's best for people who dive in Cornwall and Devon, where the detailed surveys are, but anyone can join.