How can I add my Samsung account with InShot onto my new I phone?
how can I add my inshot app account that I purchased through Samsung to my new I phone so that I won’t be billed double for the app?
Assuming you mean this app: https://apps.apple.com/us/app/inshot-video-editor/id997362197
It is free to download. Once downloaded, you should be able to log in with your account within the app and restore your Subscription or other in-app purchases.
click here ➜ If you can't find or use your in-app purchases - Apple Support