Trip Planner is a free Android app developed by SpiritApps that helps users plan their trips, whether for personal or business purposes. It offers a comprehensive set of features that make it a one-stop-shop for all your trip planning needs.

One of the app's main features is the Trip List, which allows users to view all their current, old, and archived trips in one place. Another key feature is the Trip Detail screen, which includes various functions such as Trip mode, stay, activity, trivia, to-do, mate, expense, route, odometer, Google Docs, and summary. Each function is presented in a tile format, making it easy to navigate.

The app also includes a Settings section where users can configure the app to their liking and a Help section that provides assistance for each function. With Trip Planner, users can share their trip summary data via email, other sharing apps, or upload it on Google Drive.

In summary, Trip Planner is a comprehensive travel planning app that covers every aspect of a trip. It is easy to use, has a user-friendly interface, and is available for free on the Android platform.