How can I record a phone conversation while having headphones plugged in?

[overground55]

I'm currently looking for work, and many of my interviews start out as phone interviews. Part of my process involves going back over the interviews I have and taking thorough notes so if I come in for an in person interview, I have all the facts that might have gotten missed because the interviewer was talking fast and I didn't catch something the first time.
I like to have WIRED headphones in while talking on the phone(I'm fine without bluetooth), it makes it more clear for me to hear the other person talking. Every app I've used isn't able to record a conversation when something is plugged in. Does anyone know of an app that works around this, or some features I can use that will allow for a conversation to be recorded while I have headphones in?

 

[svim]

OK so this probably is not the most simple solution to your query but being a headphone jack fan I've used it several times as an effective way to record audio from my phones. Using a very common 3.5mm audio cable, like this:

https://www.newegg.com/p/N82E16882021054?Description=audio cable&cm_re=audio_cable-_-82-021-054-_-Product

and an audio splitter adapter like this:

https://www.newegg.com/p/N82E168820...21-055-_-1&Description=audio+adapter+splitter

it's then just a matter of plugging the audio-in plug end of the adapter into the phone headphone jack, and then plug a headphone into one of the audio-out ports of the adapter and the audio cable into the other audio-out port. The other plug of the audio cable gets plugged into the audio-in port of a desktop or laptop. Using Audacity, a free, Open Source audio editor available for Linux, Windows, and Mac to record the audio signal from the phone you also have the ability to do things like slow down or amplify conversations.
https://www.audacityteam.org/
So yeah, this isn't a simple solution and it requires a lot of extras, but things like the cable and splitter adapter only cost a total of less than $5.
Hopefully someone will chime in with a more simplistic solution involving just an app on your phone.
(.... and just a caveat, recording live conversations without the other persons consent may bring up privacy issues related to local wiretapping laws)