Need a good Wifi Spectrum Analyzer

I am looking for an APP that is a good Spectrum analyzer. 
I have a iPhone5, (will be updating to 6 + soon)
I do a lot of work troubleshooting wifi networks, and on my Android, and I though my older iphone 3gs) I had a good Spectrum analyzer for 802.11 wifi.
I cannot find a good now, and I hate to have to go to an android just for this reason alone.  need mainly 2.4 GHz, but 5GHz ability would be nice to have.
I need to able to see each AP, the SSID and channel it is broadcasting on, and I refuse to spend $300 for the Wi-pry external device by Oscium.
I am already using the Net Analyzer and Status bundle, which is great for networks you are already connected to, but I need to see other networks, and their SSID and their signal strengths individual by AP.
Any help would be appreciated.  If there is nothing I may be forced to downgrade to an Android device, and that would suck as I hate Android.
Thanks

Hi Kappy
thank you so much for the info   I have a Netgear modem and anned on getting a AirPort Extreme this should still work right ???
Steve

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