What are some alternatives?
TestFlight - iOS beta testing on the fly.
Contractbook - Contractbook offers a solution to organize and manage contracts.
HockeyApp - Manage your betas and collect live crash reports for iOS, Android, Windows Phone, and OS X apps.
PactSafe - PactSafe offers a contract management application that enables clients to manage, track, implement, and deploy website legal agreements.
Shuttle.tools - Distribute and manage your mobile apps, all from one place. For Both iOS & Android.
ContractClub - ContractClub helps businesses and professionals manage, negotiate, automate and sign their contracts with software.