Krafty Internet Marketing Forum

What companies do you know for this purpose? Can you recommend something? I need to create business app for sales

It depends on what exactly app you need and your budget. Try to contact several companies and get consultations

I can recommend IDAP company, they have big experience in this direction and strong developers that can create any kind of app or software for business. Try to contact them with your tasks. Here you can find more information https://idapgroup.com/enterprise-mobile-development/