So do you need a particular iphone/Andriod app for that? Or is it a case of scanning a barcode and sending the relevant amount from a web wallet such as Coinbase?
Any Windows Phone equivalent app?
Not sure about windows phones, but i-phone does not support a mobile wallet. Android phones do though.
Using a web wallet is possible though it is a bit more of a fuss than using a mobile wallet.
There is a petition urging apple to support a bitcoin wallet and you can see/sign it here...
https://www.change.org/petitions/apple-allow-bitcoin-wallets-on-the-iphoneI've got a blockchain.info app on my ipod (I dont use an iphone, ipod + wifi is good enough for my cheap ass) and I keep around 25$ worth of btc in my blockchain wallet when I want to go out and do real-world spending. ofc I haven't found any real place I want to spend money yet as I live in a remote place, but I have tried it out by sending tiny amounts from one wallet client to another by scanning qr codes. Very simple and easy to use.
PS. I will be in Paris all summer and would love to try it out for reals, esp. if I can buy booze. Why do Parisiennes resist adopting the btc so hard? cant find anything there :-(