2Day seems veeery fine app. However, it needs phone and owner identities. Why are these asked and where the app uses them? There are number of similar apps which work fine just with data services.
Admin2Day team (Admin, 2Day) commented
Those capabilities are required because we embed a kind of customer feedback service in 2Day. This component tells us how many time the app is launched and how often. It does not collect any personal information however.