Cordulus Core vs BrrChecker

Cordulus provides precise, hyperlocal weather data to help you make smarter decisions, reduce risks, and optimize operations with real-time, historical, and forecast insights.

Brr – or bliss? BrrChecker tells you how warm the water really is before you risk your big toe. Over 3,100 measuring stations across the United States. Current water temperatures for over 13,000 lakes, rivers, lidos and coastlines in 80 countries – from over 70 official sources: national monitoring networks, buoys, health-authority samplings and, where no gauge exists, vetted lake models. The world map takes you from the globe down to a single lake or river, colored by water temperature. Clear interface: you set the order of the detail page. MADE FOR U.S. WATERS • 3,000+ stations coast to coast: NOAA buoys right at your surf break, USGS river gauges, the Great Lakes network, NERRS estuary sondes, Chicago's beach sensors and Waikiki's nearshore probes • EPA annual water-quality ratings for 250+ beaches • From Malibu to Maine, Alaska to the Keys — real measurements first, models only where no sensor exists THE PERFECT PLUNGE • Widget with temperature and trend on your Home and Lock Screen – and on Apple Watch, which fetches its own data, even without your iPhone • History curve: did the sun deliver, or did the rain spoil it all? • Temperature alert: BrrChecker pings you when your water hits your target temperature • Favorites for your swimming lake, river spot and after-work dip • Tides for coastal spots: high and low water at a glance • River levels at a glance: low, normal or high, with history in cm and m³/s YOUR SESSIONS – THE BRRLOG • Log every swim, dip, SUP or surf session – with the measured water temperature from the nearest station at the moment you were in • Apple Watch leads the workout: start it from your iPhone or right on your wrist, the phone can stay on shore. Heart rate, calories, distance and Ultra water temperature flow in from Health – and the session counts toward your rings • Photos, notes and your Brr scale, mirrored to your private iCloud – we never see them BRRCOMMUNITY – MEASURING TOGETHER • Your Apple Watch measures the water temperature while you swim. Share it and you help cover rarely sampled spots – the reading shows up in the app at that spot, anonymously and without an account • Free for everyone, can be switched off in Options WIND FOR SURF & KITE • Knots, gusts and direction with an onshore/offshore chip at coastal spots, measured buoy wind beats the model, a 48-hour chart with the best kite window THE BRRSCORE From 1 to 10, for seven sports: swimming, SUP, kayaking, surfing, windsurfing, kitesurfing and pump foiling. Wind, waves and water temperature combined – plus a wetsuit recommendation and a cold-water profile for those who mean it. VACATION WHERE IT'S WARM Filter by target temperature and discover the warmest spots from the Mediterranean to the Caribbean. "Show me water above 24 °C" – and your next destination is set. SWIM CLEAN Official EU bathing-water classification, bacteria levels and – where authorities provide them – blue-green algae warnings. Official swimming bans are always visible, even without Pro. In the US, 250+ beaches carry the official EPA annual rating. FROM ICE BATH TO BATHTUB WARM Whether it's 4 °C for the winter-swimming kick or 26 °C for a family day – BrrChecker knows both worlds. The name says it all. Data-minimal: no personal data, no accounts, no ads. Get BrrChecker – check first, then dive in. BRRCHECKER PRO (subscription) Some features require the Pro subscription (7-day free trial, then €4.99/year or your local App Store price): unlimited favorites, full history, BrrScore for all sports except swimming, water quality, widgets and Apple Watch, map and nearby, tides, water-level history & flow, photo impressions nearby, the BrrLog with Apple Watch sessions, the world map, wind for surf & kite, and temperature alerts. Everything else is and stays free. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/