The cachetur.no Trip Assistant app helps you keep track of your cachetur.no trip plan while out geocaching. You can also easily update the ETA calculation to match your actual progress.
Note: this app won't be of any use for you if you're not using cachetur.no. You will need an account on cachetur.no, and you have to create (or join) your trips on cachetur.no in a browser. This app is meant to be an offline companion, not a planning tool.