im using my own cloud agent product which is also in the current YC batch. It resolves the issues you raised here.
We are purely focused on developer experience and started building this product because of all the issues you raised here. So I feel the pain deeply of what is currently on the market.
It is just a chat window, with the ability to spin up a preview and git diff of what you are working on. We are still working on a mobile app trying to get a PWA as a placeholder out to users. We have an iMessage, slack and whatsapp integration that can be used currently for working on the go.
We dont charge per task, you can port over an existing codex sub onto us.
check it out and if it fits your use case: https://hoplite.sh