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: 
I couldn't find a way to do it or an app that would do it. There were a couple out there that claimed to have manual focus but basically just did what you described as "assisted auto focus."

I found this thread at XDA where some people have been looking through the code to find a way to add the manual focus. From what they found it appears that it is possible but someone has to code it. Its worth keeping an eye on it: <http://forum.xda-developers.com/showthread.php?t=630989>
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.