Spearo Go

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

Before you load the car, just glance at your 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.

TILE SUPPORT
Add the Spearo Go Tile to your watch face for an at-a-glance dive verdict without ever opening the app. Swipe to your Tile, see your GO/NO GO call, and head to the water.

FEATURES
• Dedicated Wear OS Tile — verdict at a glance from your watch face
• One-tap verdict — GO, MAYBE, SKETCHY, or NO GO
• Composite score from 0 to 10 with animated score ring
• Six detailed pages: Verdict, Conditions, Water, Tides, Fish Activity, Info
• 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
• 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.

Standalone Wear OS app — no phone companion required. Works on Galaxy Watch 4, 5, 6, 7 and all Wear OS 3+ watches.