A:AnswerThe product is made for iPhone and uses a Lightning connector. As long as the app is compatible with the current version of iOS installed, there shouldn’t be an issue.
A:AnswerIt depends on what phone you are using, but I’m using an iPhone 11 Pro Max and the battery is fine, if it does get low there is a lightning cable charging port on the bottom right hand side
A:AnswerYou could in theory but it wouldn’t be ideal because you have to have it plugged in via the onboard Lightning port and a cable long enough to cope with that.