SEAiq is a comprehensive marine navigation app designed for iPhone users. This app stands out from the rest as it allows users to load their own charts in various standard formats, including S-57, S-63, iENC, BSB, and KAP. Additionally, users can automatically download charts from NOAA for the USA and access raster charts based on satellite imagery.

One of the key features of SEAiq is its ability to create waypoints, routes, and tracks, allowing users to plan and navigate their journeys efficiently. The app also offers night color modes, ensuring optimal visibility during nighttime navigation. Furthermore, SEAiq includes an anchor alarm, which provides an alert if the anchor starts to drag.

Weather enthusiasts will appreciate the automatic download and display of weather information, including wind and isobar data. The app also offers chart measuring tools, such as EBL/VRM, to assist with accurate navigation. Moreover, SEAiq supports WiFi-based NMEA and AIS, enabling users to connect and integrate with other marine devices.

SEAiq can be downloaded and used to view charts without any purchase. However, after a 7-day evaluation period, certain features require an in-app upgrade. It is worth noting that continued use of GPS in the background may significantly reduce battery life.