Tzeva is a large painting company in upstate New York with thousands of clients and hundreds of employees, yet their entire operation ran with spreadsheets, word docs, and yes - pen and paper.
We worked with 
Wieder & Co, a premier software development agency to plot, plan, and develop an all-in-one software that handles everything. It's a CRM, an invoice system, and a task manager all at once. And a lot more.
Additionally, a separate app was created specifically for the subcontractors who might not speak English perfectly and might have a more limited understanding of a billing system so that they can directly bill Tzeva for their work.
