I've been working on an iOS and Android app for quite a while now and it's finally ready to get some use. I have a few people besides my family trying it out, but it could really use a larger number of people using it and adding pins to make sure it's truly ready for general release. If you're interesting in trying it out, go to https://www.facebook.com/collectible.pintrader/ and send a private message to the "Collectible Pin Trader" user with your email and whether you use Android or iOS (or both!). For Android, you need to specify the gmail account you use with your device. For iOS it is easier if it's your iTunes email address, but I think it can be any email. Note that messaging and trading are not yet enabled in the app, but should be available soon.