[madeofpalk]

Ask Apple. They seem to have solved this problem quite a while ago.

The iOS implementation allows rejection of individual permissions, doesnt prevent install, and allows the developer the freedom to choose the best possible time to ask. See https://medium.com/p/96fa4eb54f2c

[whatts]

Well, you're right, but Apple's model is fundamentally different. I don't think Android will switch to such a model in the (near) future. That would mean a lot of things have to be changed, and hundreds of thousands of apps would break. So we can safely assume Android will stay with its current system. Thus there is only one possibility left: improve the current system. Rejection of individual permissions would definitely the most powerful improvement, while still being easy to implement.