I've been using Protopie for years and it's amazing. The power and flexibility that it's brought to me and my team is pretty amazing. There isn't a single prototyping app that comes close to what you can do here. You can build as complex or as simple a prototype as you'd like. I've used it to work up full app flows with a crazy amount of conditional interactions and situations. It's the best thing you can get without having a developer build a workable app for you.
A couple of months ago I spent a few weeks trying out Flinto, Framer, ProtoPie, Origami, to see which prototyping tool suits my workflow the best. Out of those four, I ended up choosing ProtoPie as the winner.
One of my favorite prototyping tool. Reminds me of the fantastic Pixate app (killed by Google) 😢
Their support guy Fredo is very responsive and helpful. And they're working to improve all the time with feature requests.