Here is another external mic that combines with your smartphone to help you capture better quality audio. The ZealSound Bluetooth Lavalier Mic is designed with bloggers, trainers, and teachers in mind. It has a MFI certified chip and lasts up to 6 hours on battery. It weighs only 14g and clips on easily, so it won’t get in your way.
This microphone has a resolution of 48kHz. Automated transcription function is built into the app.