RiverRuler: River Length

Tap two points on a river and get the exact length of that stretch - measured along the real channel, curve by curve, not as the crow flies. Works anywhere on Earth: RiverRuler pulls live data from OpenStreetMap instead of a limited list of "featured" rivers. MEASURE A STRETCH - Two points on the channel - drag or delete markers, length updates instantly - Winding ratio, flow direction, elevation change and slope (m/km) - A simple flow-speed label: calm, moderate, fast - Start and end coordinates - copy with one tap - The stretch's share of the river's total length - Rough travel time by canoe, SUP or on foot THE WHOLE RIVER Search by name - in English, Russian, or the local name - and see the entire course. - Total length, source and mouth with coordinates - Where it flows - a chain down to the sea (e.g. Svislach → Neman → Baltic Sea) - Discharge (m³/s) and basin area (km²) MAP A vector map with Auto, Light, Dark and Satellite styles. River channels are highlighted right on the map, with name labels, so you always see exactly where to place your points. Two-finger rotation, compass. SAVE & SHARE - A shareable image with all the stretch details, styled like an in-app screenshot - Export to GPX and KML - opens in GPS apps, Google Earth, Files - A measurement log stored on your device WHO IT'S FOR Paddlers - canoe, kayak, SUP, rafting trips - planning how far it is to the take-out point. Anglers scoping the length of an accessible stretch. Hikers and cyclists following a river. And anyone curious where the river near them actually flows. ABOUT THE PRICE 3 measurements are free. After that, unlock everything with a one-time purchase - $4.99, no subscription, no auto-renewal. Pay once, use it forever. River search and the "whole river" mode are free without purchase. Restore Purchases is available. PRIVACY No account, no sign-up, no developer servers. Location is used on-device only, and only if you allow it. No ads, no tracking. RiverRuler needs an internet connection - river geometry and map tiles are loaded from servers. It's not a navigation tool and shouldn't be used for safety decisions on the water. Data sources: OpenStreetMap and the Overpass API, OpenFreeMap, Wikidata, Apple MapKit, and Open-Meteo. OpenStreetMap attribution is included in the app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://docs.google.com/document/d/1yTks6ZXW39TOUheZfEf96e-T1cFWzF1eWik8Ax-9HAo/edit?tab=t.0