What's the best Android app for sharing exact locations in remote areas or large outdoor spaces?

what3words is a navigation and mapping application designed to simplify location sharing by dividing the world into 3-meter squares, each with a unique three-word address. This system excels in scenarios like hiking, camping, or emergency situations where traditional addresses or postcodes are too broad to pinpoint exact spots. For instance, users can share their three-word code with friends meeting in a large park or with emergency services during a breakdown in a rural area, ensuring they are found quickly. The app includes offline map access, allowing functionality without cellular service, and integrates with various services like breakdown assistance providers. Reviews indicate that users appreciate its reliability in remote locations, such as one who reported using it to guide the RAC to a precise breakdown spot in Devon. However, a minor limitation is that both parties need to understand the three-word system for it to be effective, which might require brief explanation in some cases. Overall, its straightforward interface and global coverage make it a practical tool for outdoor enthusiasts and anyone needing accurate location references.