Of course iPhone is not made for professional audio recording but you can achieve very good results if you consider some basic rules.

The room:
- should be silent during recording
- should be without echo
- very small rooms are usually not suitable
- look around if there is a refrigerator or any other device with continuous rumbling noise and switch them off or stay far from them

Position, distance, way of speaking:
- sit comfortably in front of an office table
- put the iPhone on the table in front of you as shown above with about 50 cm (19.7 inch) distance from your face
- place the iPhone with the home button towards you as shown above
- speak as loud asif you were presenting on a five person meeting
- articulate clearly

If everything went well, the level of the recorded voice should be around -3dB suitable for using it as narrator voice on videos without much change.

You can use the built-in "Voice Memos" application. Recording more than 30 minutes is not recommended. With the share option you are able to send the recording in e-mail. If the file is too large, you have to use the free diskAid software to download the recording to a computer.

Here is an example video we made recently using iPhone for recording the narrator voice.