Safety and limits

Please read this

Freediving and spearfishing can kill you. Aspetto helps you plan and keeps an eye on you, but it can't keep you safe. Here's exactly what it does and doesn't do.

Not a dive computer

Aspetto is not a certified dive computer. It hasn't been tested to EN 13319, it doesn't calculate decompression or tissue loading, and it isn't for scuba. Dive times, rest times and targets are guides, not limits that make a dive safe.

Depth to 6 m on the watch

The watch app uses Apple's shallow-depth access, which reads depth to 6 m. Below that the watch's reading isn't valid. Depths on the map and the "under you" depth are charted depths with an estimated tide, not measurements.

Charts are not for navigation

The seabed maps come from surveys and estimates. Surveys can be years old, sand and kelp move, and close inshore the depths are estimated and marked as such. The tide model is good to about ±0.3–0.5 m. Use proper charts, local knowledge and your own eyes.

The SOS doesn't replace a buddy

Nothing can be sent while you're underwater. A shallow water blackout needs someone to bring you up and get you breathing within a minute or two. No alert, from any app, can get help to you that fast. The check-in and SOS help raise the alarm and find you; they don't keep you safe.

Dive with a buddy, one up, one down, every time. Take a freediving course that teaches rescue. Tell someone on land where you're going and when you'll be back.

Never dive alone. Never hyperventilate before a dive. If in doubt, don't go.

Alerts need a connection

Check-ins with our server and SOS emails need the watch to have a phone or mobile connection at the surface. Text messages to contacts are coming and aren't live yet. During the beta, alerts go only to your own email.

Visibility and sewage are estimates

The visibility forecast is an estimate with its confidence shown, and it learns from your logs. Sewage warnings only know about monitored storm overflows in England; a clear notice doesn't mean the water is clean.

Fishing rules

The target guide quotes Cornwall IFCA's recreational rules as checked in October 2026. Rules change and vary by area. Check the current rules before you take anything.

In an emergency

At the coast, call 999 or 112 and ask for the Coastguard.