◇◇There is a 7-day free trial available.◇◇ This is a hearing aid app compatible with commercially available Bluetooth earphones and wired earphones. ■Compatible with commercially available earphones The app is compatible with commercially available Bluetooth earphones and wired earphones, letting you use your smartphone and earphones like a hearing aid. ■Easily adjust to your usage context With ambient noise suppression and volume control, you can adjust what you hear to different situations,