Comment 3 for bug 1261507

The current fee for our app is 100 μBTC (0.0001 BTC), however this is per kilobyte as apposed to per transaction, this means if you send money to two recipients at one time the fee is unlikely to rise.

As most transactions are smaller than 1/4 kilobytes (http://blockchain.info/tx/6924b672f97658bd1af1b7255c6fa132cfd624110c5a0f252f45b1e210d727cf) you could get up to 4 transactions in one send without seeing a fee rise.