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.
Only 8 years later, the Moment Pro Photo app can now do this. May not be available for every phone, but it works as advertised on mine, specifically the manual focus.

<https://play.google.com/store/apps/details?id=com.shopmoment.momentprocamera>