Codemagic is a cloud-based continuous integration and continuous delivery platform for mobile apps. Codemagic helps to speed up development and to improve collaboration by automatically building and testing apps on fast preconfigured build machines, as well as by deploying apps to stores and delivering builds to other team members.
Amazing CI/CD tool for individual devs. The free plan has enough min/month for one or two apps, and the setup is super quick with optional customisation and scripting. I used it for flutter iOS releases.
Took me ~30 min from when I signed up to getting my artifact in App Store Connect ready to submit. Setup the pipeline 90% using the UI only (it integrates automatically with Github + App Store Connect accounts).