^^^
Eeesh.

The phone has to receive ANT signals (thru a dongle attached to the phone, like an ANT USB stick/adapter) and the sensor has to transmit ANT signals. It's hardware on both sides (not just software). The transmitter will say ANT and have the ANT logo. Your random Cateye transmitter is not likely to be an ANT one.

Software alone won't allow you phone to receive ANT signals.

There were a few phones that received ANT but, as far as I know, no current phone does without a dongle. As far as I know, ANT dongles are only available for the iPhone.

New phones support Bluetooth 4 instead.