AppSheet would work very well for building an app to compare data (e.g. investment rates from different companies or coverage from different broadband plans). There are several view types that would allow you to display the comparison and several charting options as well.
The challenging part of this project might be getting the data to a location where AppSheet can connect to it. The data needs to be in a tabular format. That usually means a spreadsheet or a SQL database.
Three tools that might be helpful to know about:
- AppSheet enables you to setup webhooks, which can send post requests to external APIs.
- AppSheet also has its own REST API, which allows you to receive data from an external API’s post and write directly to your data source.
- AppSheet can work with third-party services, such as Zapier. This would allow you to send a post request, receive a response, extract variables, and write to your data source.
There is a free Udemy course that is a great starting point for familiarizing with the platform and understanding how the components work together to create a custom app for your use-case.