Doctor At Work
For medical professionals to manage patient records, appointments, visit notes, and billing.

Invoice King
For people who want to bill quick and fast. This is the simplest app for invoicing.

MobileBiz Co
For professionals, entrepreneurs who want to organize their business. Includes billing, customer and item management, reports. Can support multiple companies and multiple users. Sync feature and cloud based invoicing.

 Expenses At Work
If you need to reimburse expenses from your company by generating expense reports, or just trying to keep track of business expenses.. this app could be for you.