I feel like this might have been asked a lot, but is there a way to get appinventor (the ios instance of it (I also would self host it to get rid of that issue, but I cannot find the source code anywhere)) to not sign the ipa and give me the unsigned ipa? I have a jailbreak that lets me install unsigned ipa files and I don't want to pay apple ~$100 a year for something i will use once every 3 months to sign the ipa file.
This is not currently a use case we support. That said, I made the pull request for App Inventor's iOS build infrastructure public a few months ago so if you have a Mac you are welcome to clone it and modify it. I expect you would need to comment out the SignPackage step in IosBuildFactory.