If you’ve tried to record a conversation using the iPhone’s screen recording feature, you’ll realize that it won't allow you to record the phone call. Some of us might want to keep phone call recordings for work, or to help us remember the important details in a conversation we weren’t able to jot down. It’s actually illegal to record phone conversations in some areas, and it would be too difficult for Apple to regulate a call recording system into the IOS, as Reader’s Digest details:
“While it is not illegal in every state to record phone conversations, Apple wants to make sure that everyone stays compliant by not automatically adding the feature in its smartphones,” says Burton Kelso, a Technology Expert at Integral Computer Service, a computer repair company in Kansas City. “Also, Apple wants to ensure its user’s privacy when it comes to smartphone use.”
In addition to not having a call record feature built-in, Apple doesn’t allow apps access to the microphone and Phone app directly so it can be tricky to get around that limitation, but there are ways to do it
Image via Reader’s Digest