You would want to think very carefully about giving Twitodon these rights to your Twitter account: Things this App can view... People who follow you and people who you follow. All the Tweets you can view, including Tweets from protected accounts. Any account you can view, including protected accounts.
Also, I'm _pretty_ sure you can point the twitter API at any user you want to scan followers and following. I did it on some twitter accounts I'm interested in when I started out to find some accounts to follow.