Map Chart Mosaic is a comprehensive offline mapping application designed for both smartphones and smartwatches. The app offers topographic maps, satellite images, GRIB weather forecasts, and road maps complete with cycling and hiking trails. A standout feature is its seamless switching between different map sources, providing users with detailed location information. Map views are automatically cached offline on your device, allowing access without an internet connection. Additionally, users can download maps to their smartwatches for phone-free navigation.

Beyond basic map viewing, the app supports adding markers and notes to offline maps, creating travel routes, recording GPS tracks, and sharing data as GPX files. It also provides essential GPS travel information such as speed, course, odometer readings, and estimated time of arrival (ETA). Weather forecast maps can be obtained via internet download, email, or Iridium Go satellite connections. This makes it an invaluable tool for outdoor enthusiasts who require reliable mapping services in remote areas.

One of the key features of Map Chart Mosaic is its ability to store map views in an offline cache, enabling users to view them later without an internet connection. This functionality extends to smartwatches, where maps can be downloaded and viewed independently of the phone. Users can add map markers and notes directly onto these offline maps, making it easy to mark important locations like parking spots or trailheads.

The app also allows for the creation of travel routes and the recording of GPS tracks, which can be shared as GPX files. These capabilities are complemented by real-time GPS travel information including speed, course, odometer readings, and ETA. For those needing weather updates, GRIB weather forecast maps can be accessed through various means such as internet downloads, email, or satellite connections. Furthermore, the Wear OS smartwatch version operates independently once maps are downloaded via the smartphone app, enhancing convenience and accessibility.