I just use the voice memos app that was installed on my phone. The sound quality is better than the Olympus digital recorder that I use. I record on both devices so I have a back-up.
I just used this for the first time ... Free Online Time Stretcher | OnlineToneGenerator.com ... worked like a charm. All you have to do is upload your file (which I usually email to myself and download from the computer).Is there any way to slow the audio down when trying to transcribe?