Smart AMP Pro 4+

[WARNING !]
If you use a sound amplifier without a doctor's prescription, your hearing can get worse.
Be sure to plug-in your earphone or pair your bluetooth headset with your mobile phone before starting the app.
This app is a software amplifier app, and the consumer agrees that AlgorKorea, Co., Ltd. is not liable for any accidents or damages arising from the use of this app by users.

This app requires monthly or annual subscription to use normally. You can use it free of charge for 3 days after subscribing. If you unsubscribe from [Account Settings> (Edit) Subscription] within this period, there will be no charge, but it will automatically charge the subscription cost after 3 days.

Subscription prices may vary by country and tax and exchange rate.

[Terms of Service and Privacy Policy]

Terms of Service : http://www.hearing-aids.co.kr/m/sub05/01.php?id=3666&page=1&mode=read

Privacy Policy : http://www.hearing-aids.co.kr/m/sub05/01.php?id=1277&page=1&mode=read

Subscription Terms : After free trial, Smart AMP Pro monthly subscription is USD 3.99 or annual subscription USD 39.99, automatically renews unless turned off in Acount Settings at least 24h before current period ends. Payment is charged to your the app store acount. Unused portion of free trial is forfeited after purchase.

It is a 64-channel personal sound amplifier app that minimizes the delay between external sound input and amplified sound heard through earphones using the latest technology.

AlgorKorea's hearing aid firmware & app development technology created Personal Sound Amplifier (PSA) app that performs microphone & receiver calibration, includes all of the same four features as a smart hearing aid. The Personal Sound Amplifier app produces loud volume for profound hearing loss.

64 Channel Nonlinear precise Compression and Noise Reduction based on probabilistic analysis are the main features of AlgorKorea sophisticated Personal Sound Amplifier app. All of the three algorithms are implemented in real-time with high sound quality for hearing impairments.

The output audio level may be slightly different based on mobile phone’s volume settings, microphone and earphone/headset types.

Just make sure your iOS version is 12.0 or higher.


This app can be used for free for 3 days after subscribing, and if you subscribe, you can continue to use the advanced voice amplifier function even after this period.

The subscription policy is as follows:

- If you do not cancel your regular payment at least 24 hours before the end of the subscription period, it will renew automatically.

- After subscribing, you can manage your subscription history and cancel your subscription from the Subscriptions option in the App Store menu.

- The remaining validity period after subscription cannot be canceled.

- Subscription options are monthly subscription and annual subscription.