[cobirds] Software/apps for bird spectrograms - Recommendations?

COBirders,

 

I was enjoying trying to make some recordings with phone.

 

Can anyone recommend software or apps for making spectrograms with iPhone? Please excuse my ignorance, but how do birders make spectrogram files uploaded to eBird?

Please feel free to reply offline, or to COBirds if others might benefit too.

(SGetty@ColoradoCollege.edu)

 

Thanks,

Steve Getty

Colorado Springs