Is an All-in-one Project Management app be a useful product?

We are working on an idea of having a single platform to manage all the basic tasks instead of switching to multiple apps (like calendly, pipedrive, asana, quickbook etc.) The purpose of the platform will be to handle the basic workflow for Freelancers and Small teams only : 1. Calendar module- For setting up daily tasks and scheduling meetings 2. Pipeline module- as a CRM or Customer onboarding 3. Projects module- To manage all the tasks and data flow related to projects. 4. Accounting module- To manage proposals, invoices and basic reports. Will this be a useful product for the target audience (not targeting Enterprises)?