# HD75

> Smartphone app for personalizing and controlling Sound World Solutions' HD75 Bluetooth hearing aids. (iPhone/iPad app by Conversion Sound Inc..)

- Source: https://appshunter.io/ios/app/hd75/id1470590858 (this page in markdown: same URL + `.md`)
- Developer: [Conversion Sound Inc.](https://appshunter.io/developer/727309727)
- Category: Lifestyle, Productivity
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 8.0 · 9 MB
- Languages: English, Korean
- Released: 2019-12-20
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/hd75/id1470590858/reviews.md

## What is HD75?

The HD75 app allows users of Sound World Solutions' HD75 Bluetooth Series hearing aid products to personalize their settings and control the device via Bluetooth link from their smartphone.

During the first run of the app, an automated program will walk you through the steps in tailoring the performance of the listening device to your individual preferences.

The "Home" tab allows you to select two additional environmental settings designed to optimize the performance of the listening device in specific situations.

Restaurant Setting emphasizes the directional microphone to focus on sounds coming from in front of you and provide rejection of unwanted sounds in noisy environments. Entertainment Setting provides increased low frequency response for a more natural, balanced sound at musical or theatrical events.

The app also provides an "Equalizer" tab to adjust individual settings for treble, mid, and bass frequencies for a truly customized user experience. You can also adjust the volume, similar to the volume button on the listening device.

Finally, the "Tools" tab gives you the ability to change the language of the voice prompts in the HD75.  You can also access the User Guide for the HD75 app from the "Tools" tab.

## Key features

- Personalize hearing aid settings
- Control device via Bluetooth
- Environmental setting optimization
- Customizable equalizer (treble, mid, bass)
- Volume adjustment
- Change voice prompt language
- Access user guide


## Frequently asked questions about HD75

### What hearing aids does HD75 support?

HD75 is designed to work with Sound World Solutions' HD75 Bluetooth Series hearing aid products. It allows users to personalize settings and control the device via a Bluetooth link from their smartphone.

### How do I set up HD75 for the first time?

During the first run, an automated program guides you through tailoring the listening device's performance to your individual preferences. This ensures a personalized experience from the start.

### What are the environmental settings in HD75?

HD75 offers two environmental settings: 'Restaurant Setting' to focus on front sounds in noisy environments, and 'Entertainment Setting' for enhanced low frequencies during music or theater events.

### Can I adjust the sound quality with HD75?

Yes, the 'Equalizer' tab in HD75 allows you to adjust individual settings for treble, mid, and bass frequencies, providing a truly customized user experience for your hearing aid.

### How does HD75 handle ads?

HD75 does not contain advertisements. The app is completely ad-free, allowing for an uninterrupted user experience.

### What devices is HD75 compatible with?

HD75 is available for iPhone, iPad, and iPod devices. It connects to your hearing aid via Bluetooth.

### How often is HD75 updated?

The latest version of HD75 is 1.8.1, last updated on October 31, 2022. Updates typically include improvements and new features for the app.

### Is HD75 suitable for children?

HD75 has an age rating of 4+, indicating it is suitable for children. The app focuses on personalization and control of hearing aid devices.

## Version history (last 4 releases)

### 1.8.1 — 2022-10-31

Support for selecting Spanish voice prompts on HD75s.

### 1.7.1 — 2022-05-27

Added support for the HD75R.

### 1.6.3 — 2021-06-21

Bug fixes

### 1.5 — 2019-12-20

No release notes.

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## More apps by Conversion Sound Inc.

- [CS Customizer](https://appshunter.io/ios/app/cs-customizer/id727309724)

All apps by Conversion Sound Inc.: https://appshunter.io/developer/727309727

## Related topics

[hd75](https://appshunter.io/ios/topics/hd75)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*