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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
If you want to capture and decrypt the traffic from one or a few apps without root, you can use apk-mitm to reverse engineering the apps to install a network config file which allows you to use user CA to decrypt the traffic of that app. apk-mitm will do everything for you, you will just have to reinstall the app(it requires first to uninstall from the phone because the app's signature will be different and it will not allow installing the apks from apk-mitm as an update to the original app). Modern apps use split apks, you can use SAI to install an app from split apks.