The app is is objective C , In a perfect world I would want the dev to stay on, but if that doesn’t end up being the case - what are the pros and cons of using a upwork dev to maintain the code?

I’m considering gamifying the app, does objective C have the capabilities to add gaming api elements like flash cards or more advanced gaming ? Or is the gaming element more with the gaming center like adding leaderboard and other elements to make the app more sticky?

I have been asking around for someone who has experience in objective C, and one of my friends is interesting in joining me on this venture but he has experience with swift. Would re writing the code in swift have any pros and cons?

Lastly, is there a tool you can recommend that can help with debugging , and even better, possibly a no code solution? Thanks for your time and hope to get some good discussions around this going