Question: Is there any way to manually focus the camera on my Android phone?

I know that you can tap on where to focus, but that's just assisted auto focus. What I want is to be able to manually adjust the focus.

Answer: 
The new API for full control of the camera on android had been added to android version 5. Google added these features like iso ,manual focus and etc in android lollipop. I personally think to use this new API the camera hardware must support this features, However I didn't find any reference to claim this, but it makes sense to me that a hardware must be able to do such stuff.

you can use [this](https://play.google.com/store/apps/details?id=pl.vipek.camera2_compatibility_test) app to check Manual Camera Compatibility.
My Hauwei Mate 9 has manual focus, ISO, and shutter speed options. I use it frequently for sunsets and stage lighting.