Thank you so much for only requesting the permissions you need when looking for friends via Facebook. I'm so frustrated by the number of apps that request permission to post just so I can find friends. (And I'll never grant that permission.)
Edit: Though it looks like you're asking permission to update Twitter, and that's making me hesitant.
There is only one point in the app where we ask (politely) if you are willing to tweet about Zwapp.
That is in the autoshare section of Settings. You remain in control at all times about posts. You can turn sharing to social networks on/off but everything defaults to off.
Its a three month project that we did. The app is free and will remain free. It is born out of a frustration that finding apps is becoming more difficult and that browsing the App Store just isn't working. In real life, the first thing we do is compare apps on our phones, so why not do that on your phone too.
We have thought about things like that but to be honest, we want to keep the experience focussed on your friends. There are already enough top app lists around. What makes Zwapp different imo is that it gives you direct access to the apps and reviews of your friends instead of strangers.
We have affiliate links set up which will provide some revenue.
The site is still very clean, almost Instagr.am -ish, but we are also working on a web view where you can see and share each others app profiles (see http://www.zwapp.com/users/237 for a work in progress example).
Just connect with your friends (using Facebook, Twitter, or your contact list) and you can then browse your friends apps. Zwapp detects apps automatically on your device with a few clever tricks.
Also the real-time feed shows you the apps your friends are downloading now, reviews, likes etc.
we do two things:
1) We check on custom schemes (btw: watch that space as we will open source our work on that shortly!)
2) We check processes on iOS4 devices and match those as well.
The algorithm learns and will detect better and more with increased usage.
Edit: Though it looks like you're asking permission to update Twitter, and that's making me hesitant.