My co-founder and I have been working on a bunch of different apps for Android that just aren't going anywhere.
While we both hold full time jobs and do this on the side, how do I break it to him that we need to call it quits? How should we deal with existing apps. i.e. Who keeps what? If we keep the apps going we have certain fixed expenses to keep them running.
Tough conversations are usually best handled with straightforward talk.
Tell him how you're feeling. Ask if he's up for working on a list with you of expenses associated with each app to sustain it, and if there are any he's particularly interested in keeping. Tell him if there are ones you'd like to keep. Be prepared to answer questions like "what would make you change your mind?"
It may seem reasonable to come in with a plan to suggest to him, but people can get defensive if they feel like one side of a conversation is much more prepared for it than they are. Start by letting him know how you feel and asking questions. Make specific proposals later.