You can import .indexcard project files from Dropbox in two ways:
- Within the Index Card app, go to Settings > Copy from Dropbox to display the .indexcard files found in your Dropbox IndexCard folder. Tap one to copy it to the Index Card app.
- Launch the Dropbox app on your device. Select a .indexcard project file. By default the are saved to the IndexCard folder. Select the project you wish to import from the file list. An Open In... dialog will appear like the one pictured below. Select Index Card from the app list. Index Card app will automatically launch and import your project.