No other data issue has been cited... There is no other data available on iOS to use for productivity tracking anyway. The app is best used as an out-of-band co

No other data issue has been cited... There is no other data available on iOS to use for productivity tracking anyway. The app is best used as an out-of-band console / intervention / notification center, however getting a "total screen time across all devices" metric is a much desired feature for users. As the APIs stand today, the only way the phone screen pick up event can be captured, is if the persistent location capability is in place. Of course, a users location is very informative for work goals and what a users hopes might be for screen time, so it also matters as a data point (think, office vs transit). So a number of apps have used both together, for the purpose of tackling digital wellness. The decision as to which is "primary" has been applied without consistency by the reviewers.