Features: 1. 3 classes of Amplifier with noise reduction. Users can choose their own volume amplification level, comfortable listening. 2. Hearing Protection: Amplifying the volume can hear minute sound details, but if you enlarge any sound without limit, the loud sound can cause ear pain, dizziness, and even permanent hearing damage. This app uses advanced algorithms to enhance the lower sound while suppressing strong sound to protect your hearing. 3. Multiple Scenarios Selection: This app has a 12-band audio equalizer designed specifically for hearing aids, and provides preset six kinds of listening scenarios for conversational, music, video, and high, medium and low hearing loss. Users can also set their own scenario. 4. Microphone Selection. Currently, different models of iPhones provide 3 to 4 microphones. They are located below the phone, next to the front camera and next to the back camera. The user can select the microphone towards the sound source to get a clearer sound. 5. Recall function. It buffers the past five minutes sound for recall. The function is like the black box of air plane. You can get back the past conversation if it is necessary. Or save it to an audio file as a keeper. 6. A professional sound recorder is attached. 7. Voice to Text. You can use hearing aids. At the same time, record audio files and convert speech to text. 8 Support Bluetooth and wire headphone. 9. Can run parallel with music or game apps. Even if you listen to music, watch videos, play games, you can listen to the sound of environment. 10. High-quality sample rate. Use the sample rate of the CD quality to make the sound details perfectly present. 11. Support sound balance. Users can adjust the volume for 2 ears individually. 12. Can run in the background and very low energy consumption. Even if the screen is locked, the software can be used normally. 13. 7-day free trial Legal: Please see Hearing Aid - Sound Amplifier’s “Terms of Services” and “Privacy Policy” Terms of Use: http://www.dawnstreamsoft.com/tou_en.html Privacy Policy: http://www.dawnstreamsoft.com/privacy.html Subscriptions Hearing Aid - Sound Amplifier is available for free download. All users are invited to take 7 days free trial. If you want to continue using the service, we offer you auto-renewing 1 month Subscription: $4.99 monthly In addition to this subscription, we also offer two other subscriptions: 3 Months Subscription: $13.49 ($4.49 / month), auto-renewing quarterly 1 Year Subscription: $35.99 ($2.99 / month), auto-renewing yearly - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Setting after purchase - No cancellation of the current subscription is allowed during active subscription period Contact Us: If you have any questions or suggestions, feel free and send them to support@dawnstreamsoft.com. Or visit our website http://www.dawnstreamsoft.com for more information. We'd love to hear from you :)