There are a few states that require everyone in the conversation to be aware of recordings for it to be legal. California, Florida, Massachusetts, and Washington are just several of the fourteen states that demand it

Unfortunately, since smartphone makers can't make their devices with each state in mind, they tend to do what's best as a whole. In this case, that's leaving out the call recording option entirely

* Press Start server button for run service
* Press Stop server button for cancel observing for service

* Play button get your list of calls

* Folder with files on SD Card - AudioRecorderCalls
* Format record is .mp3

Enjoy!

Many Thanks Yuichi HIRANO !!!

Screenshots: