I use an app called Secret Voice Recorder on Android. It doesn't have any notifications and stays hidden, so you can feel confident that a girl won't find anything out even if she snoops into your phone.
I did have a pretty funny situation happen once when recording a date. I went out on an afternoon coffee date with this beautiful Indian sorority girl (strong accent and all) from a local college. She was talking about how she told her roommate about the date with me, and she said "I told her to put my clothes out on my bed because I'm getting laid." I tried to cover up my surprise, I mean, this was a fucking coffee date for god's sakes, I wasn't even planning on taking her back home, and I was bouncing to another date within 30 minutes. I walked away from that date thinking I had blown my chance to fuck the hottest girl I had ever been on a date with.
I then got home and listened to the recording, and it took me five times playing it over and over to realize she said "I'm getting LATE", and her Indian accent made it sound like she said "laid".
So yeah. Always record your dates.
I did have a pretty funny situation happen once when recording a date. I went out on an afternoon coffee date with this beautiful Indian sorority girl (strong accent and all) from a local college. She was talking about how she told her roommate about the date with me, and she said "I told her to put my clothes out on my bed because I'm getting laid." I tried to cover up my surprise, I mean, this was a fucking coffee date for god's sakes, I wasn't even planning on taking her back home, and I was bouncing to another date within 30 minutes. I walked away from that date thinking I had blown my chance to fuck the hottest girl I had ever been on a date with.
I then got home and listened to the recording, and it took me five times playing it over and over to realize she said "I'm getting LATE", and her Indian accent made it sound like she said "laid".
So yeah. Always record your dates.