I have not used the windows app, but the android one works just fine. Same as chatgpt.

You enter prompts and images and get a respond back.

What issues are you experiencing?

The Spark feature's UI isn't as good as the others.

For example, I'm not sure if it should prominently show recent workload, and unless I use MCP to manipulate files on my computer, local file manipulation isn't possible. Personally, I don't think it's going to be that useful.