What functions or options are available to implement automatic restrictions (e.g., time-limited access, daily usage duration, roles/user groups)?

Is individual programming (HTML, Java, CSS) possible to customize apps?

Which AppSumo plans include all future updates and features? Are there any limitations with the plans?

Where can the app be published (e.g., Android APK, App Store)? Are there additional costs involved?

Are there hidden features behind paywalls in the AppSumo deal? If so, which ones?

Thank you very much for the responses. Unfortunately, I had to split the questions because the character limit set by Appsumo is very low. Thank you for your understanding!