Spearo Go

Check conditions before you gear up. Spearo Go crunches weather, swell, tides, and fish activity into one score so you know whether it's a GO day.

Spearo Go is the spearfisher's pre-dive checklist — on your wrist.

Before you load the car, just glance at your Apple Watch. Spearo Go combines real-time weather, swell height and period, tide phases, and solunar fish activity into a single 0–10 score with a clear verdict: GO, MAYBE, SKETCHY, or NO GO.

WHAT IT SCORES • Wind speed, gusts, and direction • Swell height and period • Water temperature and visibility estimate • Tide state (rising, falling, slack) • Solunar major and minor feeding periods • Moon phase influence on fish activity

HOW IT WORKS Each factor is scored individually, then combined using a weighted algorithm (Weather 30%, Marine 30%, Tides 15%, Solunar 25%) tuned for spearfishing conditions. The result is one number and one word — so you spend less time checking apps and more time in the water.

FEATURES • One-tap verdict — GO, MAYBE, SKETCHY, or NO GO • Composite score from 0 to 10 with animated score ring • Five detailed pages: Verdict, Conditions, Water, Tides, Fish Activity • Save multiple dive spots and switch between them • Background refresh every 30 minutes — always current • Offline tide and solunar calculations — no API key needed • Haptic feedback when conditions change • Fully accessible with VoiceOver support • No subscriptions, no ads, no account required

Spearo Go uses free Open-Meteo APIs for weather and marine data. Tide heights are calculated offline using M2+S2 harmonic analysis. Solunar periods use Meeus orbital math. Your location is used only to fetch conditions — never stored or shared.