In my application I have 3 types of monthly auto-renewing subscriptions. Pro 3.99$ Premium 2.99$ Standard 1.99$ A user who is already having a standard subscription plan, plans to upgrade to Premium after 15days of usage. In this case who is responsible for refunding the remaining amount on usage charge. If its developers responsibility what is the API to use and how to calculate refund.

I'm developing an application where user can access contents based on In-app purchase subscription.As per the app requirement I want to restrict user from accessing the content when they try to access from a different country. Example: Being a user I brought subscription while I was in India by paying lets say 10$ instead of actual 20$ (50% discount for India users). Lets say I am travelling to other country and in order to use the content user now has to pay the remaining 10$. As per apple's policy is this allowed? , if yes, then how to achieve this.

I am having a weather monitoring device that records temperature and humidity for max period of 20 days. Once I connect the device via my app I want to download the entire data into the application. Since the payload is large its taking me more time(> 1hr) to download all the data. Is there a way I can download the data quick like an API call. The hardware is manufacture by the same company as the one developing the app so if there is a solution that needs to be updated from peripheral also welcomed. Should I go for MFi to solve this problem(if that is the issue) or is there any other way I can achieve this. kindly help

I have created a .p8 file and uploaded to Braze(push notification provider) dashboard and gave teamID, app id etc. Braze library integration is completed on app and device token is been passed to Braze API.(checked with breakpoints) Since .p8 authentication doesn't have separate development/prod setup, when I trigger a notification from Braze I should receive a notification on iPhone right? even though I am using development signing certificate or does it work only with distribution profile. Note: I am using Enterprise account. Help would be appreciated. thanks Vic