★ ★ ★ Features ★ ★ ★
✓ No internet connection required to use the app
✓ Free for Samsung Note and Galaxy tablet users!
✓ 8 frequencies to choose from: 16kHz, 18kHz, 20kHz, 22kHz, 24kHz, 38kHz, 44kHz and all
✓ 8 timing options to choose from: run forever or run for 5, 10, 15, 20, 25, 30 or 60 minutes
✓ run the sound when the app is minimized
✓ more free updates coming soon