Brenden Mulligan has an interesting post on various ways to ask users for permissions to access photos, contacts, and notifications on iOS. Brenden and his team experimented with different user flows and designs for Cluster, and what they ended up using seems like a good balance to me: there are multiple dialogs, but they’re often contextual and they explain to the user how data will be accessed before making a decision.

The “trick” of showing a custom permission dialog before the real iOS one seems to be a common trend these days – I’ve seen it in Facebook Messenger and other apps, and the general idea is that the user will be prepared when iOS will pop up the permission dialog to grant access to private data. There are many ways to approach this problem (dialogs integrated with welcome tutorials, custom dialogs with screenshots, etc), but I agree that making permission-granting contextual to a user-initiated action is much better than a deluge of permission dialogs on an app’s first launch.