Automate administrative tasks that you would normally have to do through the Apple Dev Center website. Life's too short to manage device identifiers by hand!
$ ios devices:list
Send push notifications from the command line. Simply provide your credentials, construct your message, and 3...2...1... blastoff.
$ apn push "<token>" -c /path/to/cert.pem -m "Hello!"
Generate Passbook .pkpass files with ease. Rapidly iterate on the design and content of your passes, or generate one-offs on the fly.
$ pk generate Example.pass -T boarding-pass
Secure your In-App-Purchases by verifying App Store purchase receipts, and retrieving the information associated with receipt data.
$ iap verify /path/to/receipt