Simple Job Tracker
SJT is a mobile app for Android and iOS that is intended to be used by small business owners.
Its designed for location based recurring service businesses. This means any business that visits many addresses per day, and will visit those same addresses on a recurring schedule in the future.
It manages invoice and receipt numbers, customer balances, customer contact details, upcoming jobs.
Data is synced to a remote store, allowing many users to use the app in a single business.
The SQLite MPI was designed as a result of this project.
SJT is described in much more detail at simplejobtracker.com.