Is the iOS Voice Memos built-in app appropriate for recording an hour-long interview?
Solution 1:
The only reason it would not last the hour would be if you didn't have room on the device to store the audio file.
Bearing this in mind before you conduct an interview make sure you have enough memory to last.
For a one hour recording you will need about 160mb of free disc space
Solution 2:
There are various records (/1, /2) saying that since iOS4 there's no limitation in size any more. My suggestion: put the iPod on the table, run the voice recorder and see how long it goes and if the process of importing to the computer works fine.