A leaked image from a WWDC developer session is making the rounds, showing that the Voice Memo app that isn’t currently included in the iOS 7 Beta 1 will make an appearance in a future release.
Also, a tipster tells us the release notes for the first iOS 7 Beta mention the Voice Memo app:
Voice Memos – Known Issues
The VoiceMemos app is not available in this seed.
The Voice Memo app doesn’t seem to appear in any of the iOS 7 marketing materials on Apple’s website, but developers should see it in a future iOS 7 beta release and we expect it to be included in the final iOS 7 release this fall.