To control my Hue lights, I prefer to use the official app from Philips Hue. To configure accessories, I have so far resorted to iConnectHue (App Store link). With the latest update to version 4.14, Stefan Göhler's app offers numerous new functions around the topic of colours – and thus also becomes really interesting for controlling lamps.
iConnectHue 4.14: Improved control and more possibilities with colours Update brings colour explosion
Update brings colour explosion