Hope this is allowed here, mods feel free to delete if it isn't.

I've been doing some gaming on my phone lately (Android), and touchscreen controls drive me nuts, so I'm looking into getting a portable controller. I'm hoping to find a controller that can snap onto my phone so that I don't need a separate stand, but I'm also hoping to find something small enough that I can just slip it into my pocket. I don't have any sort of bag that I carry with me on a regular basis, so something like a Backbone is too big for me to consider portable.

From the things I've found so far, the front-runners in my search seem to be the Turtle Beach Atom due to its comparatively low cost (especially used) and very portable form factor, and the GameSir X4 Aileron, which looks just about as portable and is much more customizable, but more expensive. The Razer Kishi v1 also looks somewhat compact, and the Asus ROG Tessen folds in half, but those two seem like they might be a bit larger and might not fit in my pocket as easily.

Does anyone have any experience with the controllers I'm looking at and have any thoughts they'd like to share? Any recommendations or anti-recommendations? Do you know of any other controllers I missed that might fit my criteria?

I mainly play emulated retro games on my phone, if it makes any difference, though occasionally I'll check out newer games if they catch my interest.

Thanks for your time!