At the moment PieSync supports over 200 online apps and new ones are added on a regular basis. Here are some of the most popular apps that PieSync supports:
- Google Contacts (Gmail)
- iCloud contacts
- … and of course many more (over 230).
PieSync can connect Command to any single app it supports. You can find the full list of all the apps PieSync supports here. There you can also vote for apps that are currently not yet supported.