RFreqeuncy Free Edition is also available at Android Market.
You will get these after purchasing Pro Edition:
(1) No Advertisement
(2) Better Support
RFrequency is Frequency/Channel Calculator for RF Engineer.
Frequency and Channel can be easily converted via RFrequency.
Now RFrequency supports:
* Cellular: LTE,WCDMA,TD-SCDMA,GSM,CDMA,D-AMPS
* WLAN: 802.11a/b/g/h/j/n,Bluetooth
* Audio/Video: DVB-T, North America Broadcast TV,Cable TV
Thank you for your purchasing.