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It is a great idea to create an application. Many organizations and product companies have their own individual application. And development is the most difficult, expensive and indispensable part of creating an application. There are many modern Rapid Application Development Platforms that combine architecture, tools to use development. I think you should not search freelance forums as I suggest to order rapid application development https://www.jmix.io/rapid-application-development/ a professional team can develop an application for any kind of business.