Earlier quoted context omitted.
Totally true that TestFlight / Play Store uploads are available within 15 min, but in our experience, nobody wants to push to those platform that frequently, and force many upgrades of the app every day, so instead they do nightly builds at best. More importantly, it doesn't help if people don't have the right phone. We would love to help you with this use case, does an emulator in the browser works for you or do you…
For me, an emulator solves the 80% case: I'm soliciting quick feedback on specific changes. I'd happily use one as TestFlight for dev builds. I'm optimistic my users (my team) would find it more convenient, less interruptive. I'll ask them. The other 20% is stuff that doesn't work in an emulator. Usually Apple, certificates. It's enough of a minefield that QA means real devices, unfortunately. Used phones are vastly…
For the deployment, wolfia allows you to share builds before they are merged and solicit feedback from your team earlier. If you think about it, the feedback loop is much faster in practice than waiting for deployment and then getting the feedback. However, I do agree that the build step is a pain! Our vision is to bring the same experience web developers have to mobile essentially, so we'll take a stab at it in the future :)