Yes, you can use Fishing Points without an internet connection. The app will open and work, but some features like fishing forecasts and maps require a network connection and won’t load offline — this is expected and out of our control.
As a workaround, you can preload forecasts and maps while still connected to the internet. Just make sure not to close the app afterward, as doing so will clear the preloaded data. It’s not a perfect solution, but it can help in areas with no coverage.