# KaiserTone Audio Player +HiRes — Best sound Quality and HiRes

> High-resolution audio player with advanced sound engine and extensive equalizer. (iPhone/iPad app by CyberFort LLC.)

- Source: https://appshunter.io/ios/app/kaisertone-audio-player-plus-hires/id725299207 (this page in markdown: same URL + `.md`)
- Developer: [CyberFort LLC](https://appshunter.io/developer/569899155)
- Category: Music, Lifestyle
- Price: $9.99
- Rating: 4.50/5 from 213 App Store ratings · 236 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 36 MB
- Languages: American English, Japanese
- Released: 2013-10-22
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/kaisertone-audio-player-plus-hires/id725299207/reviews.md

## What is KaiserTone Audio Player +HiRes?

Feel the power of music.

KaiserTone contains the "Amazing Quality Sound Engine AQS-XI”. This high-speed sound engine makes use of over 64000 frequency bands to deliver the very highest quality audio. Sound Engine AQS-XI provides an equalizer, virtual surround, cross fader, gapless playback, silence detection, noise reduction, and a dynamic limiter, to allow you to listen to your favorite music at your preferred sound quality.

KaiserTone plays music files stored on the iTunes library and in the high-resolution music database (HiRes DB).

Supports High-resolution sources:
1) playback of high-res sources up to 768kHz/32bits
2) PCM and DoP (DSD over PCM) playback of high-res DSD files up to 12MHz/1bit. 

Supported audio format:
- iPod Library(iTunes): audio format used by Music App of Apple
- Hires DB: DSD(2.8MHz~12MHz/1bit, .dsf, .dff), FLAC(8k~384kHz/8~32bit), WAV(8k~768kHz/8~64bit), Apple Lossless(8k~384kHz), AIFF(8k~768kHz/8~32bit), AAC(8~320 Kbps), MP3(8~320 Kbps), MP4(as Sound), M4V(as Sound)
* In iPod Library, Music app exclusive data (Apple Music, DRM, iCloud) can be cooperative played back with the restriction function by Music app.

Compatible models:
iPhone 5 or later, iPod touch 7, 6, iPad Pro, Air2, Air

Playback Options:
- 6 modes of continuous playback (+ Medley)
- Music shuffle
- Spectrum analyzer (stereo split, bandwidth resolution, persistence, etc.)
- Speaker, headphones, Bluetooth, AirPlay, dock
- SNS posting (iOS11/later, Twitter, facebook, ...)
- Sleep Timer from 10 min. up to 8 hr.

Sound Quality Effect:
- Presets equalizer: Normal, Perfect, Eargasm Explosion, Rock, Rap, Metal, Country, Jazz, Acoustic, Classic, Blues, Oldies, Reggae, Opera, Speech, Bass, Mid, Treble
- Graphic equalizer:(5 Band, 10 Band, 20 Band, 30 Band, Spline curve 16k, 32k)
 Range: -12dB ~ +12dB. (Minimum Step: 0.1, 0.5, 1.0dB)
 Six types of equalizers for your enjoyment:
 ○ Beginner: 5 Frequency bands: 100Hz-8KHz
 ○ Average: 10 bands: 32Hz-16KHz
 ○ Expert: 20 bands: 32Hz-22.62KHz
 ○ Master: 30 bands: 25Hz-6.3KHz
 ○ Spline Curve: Customizable frequency band range
　16k: 32Hz-16KHz, 32k: 16Hz-32KHz
- Virtual surround sound presets
- Digital Output (Max 768kHz/32bit)
- DoP output v1.0/v1.1
- "Prevent the head cutting" for DAC (0 to 3.0 sec.)
- Up-sampling with integral multiples settings

Volume control:
- Fine volume
- Left/Right balance
- Gain adjustments
- stereo/monaural

Music Selection
- Playback music from the iTunes Library and the HiRes DB
- by artists, albums, songs, genres, playlists(Create/Delete), Compilations, Composers, SampleRates, Formats
- "Shuffle" play can be selected from the song list
- "All songs" has the top of the artist/album
- Songs can be searched from the artist, album, song lists
- “Album artist” settings
- Grid View (on iPhone5/more)
- Mini Player
- Add to queue

Settings
- Customize the design with 24 different colors
- Silence detection (Automatically skip silences lasting 3 or more consecutive sec.)
- Automatic dynamic limiter, noise reduction
- Spectrum analyzer (stereo, bandwidth, color...)
- Crossfade (0 to 20 sec.)
- Pause Fadeout (0 to 1.0 sec.)
- Album art view swipe action settings
- Player orientation settings
- Edit the music selection tags

Other
- 7 Virtual surround sound presets (live Reverb)
- Control playback with headphone buttons and Bluetooth
- Output with speakers, headphones, Bluetooth, AirPlay, docks
- Album art display
- Gapless playback
- Auto pause on unplugging headphones / receiving a phone call
- Background playback
- Display lyrics when included in the song file
- importation to the HirRes DB by iTunes and AirDrop, by Files app on iOS11 or later

Notes :
* In Hires DB, it cannot play a track with compression dff file / DRM protected file.
* Only Playlist created in this app can be deleted
* The download button of purchased sound source from mora is displayed only for "language:Japanese or region:Japan". mora's service is only available in Japan

## Key features

- Amazing Quality Sound Engine AQS-XI
- High-resolution audio playback (up to 768kHz/32bits)
- Extensive equalizer with presets and custom bands
- Virtual surround sound
- Gapless playback
- Silence detection and noise reduction
- Plays iTunes Library and HiRes DB files

## What do users think of KaiserTone Audio Player +HiRes?

Overall sentiment: positive

**Pros**

- 👍 Helpful for hearing loss
- 🚀 Fantastic sound quality
- 💡 Excellent EQ and customization options
- 🚀 Best music player on the app store
- 👍 Intuitive and easy to use
- 🚀 Plays high-res audio files well

**Cons**

- 🐛 Volume increase not working
- 🐛 Crashes randomly
- 🐛 Deleting songs from playlists is buggy
- 🐛 Compatibility issues with certain devices and audio formats
- 👎 Confusing and outdated user interface
- 👎 Doesn't work with non-iTunes music sources

**Commonly reported bugs**

- Volume increase not working
- Crashes after playing for a while
- Deleted songs reappearing in playlists
- Compatibility issues with certain devices and audio formats
- Laggy performance when using multiple apps
- DRM-protected songs not playable

**Most requested features**

- Increase maximum gain level
- Add CarPlay support
- Implement cloud sync for user settings and playlists
- Improve playlist management and song deletion functionality
- Add support for more audio formats and streaming services
- Enhance user interface design

## Recent user reviews (10 of 236)

All indexed reviews: https://appshunter.io/ios/app/kaisertone-audio-player-plus-hires/id725299207/reviews.md

### 5/5 — Amazing Player

*2026-07-31*

I love this music player it has so many options and it really gives me control of how I truly want to enjoy my music.  I do have one suggestion for the app would be to add a track number display that show how many songs are remaining in a full shuffle, just a suggestion.  Thank you again for this app, it’s one of my personal favorites.

### 2/5 — アルバム内に異なるアーティストが存在する場合に別アルバム扱いされる。

*2026-06-18, version 3.7.8*

アルバムから選曲する時、アーティストが異なると別アルバム扱いされる。これを防ぐ設定をつけて欲しい。アルバム内に異なるアーティストが存在すると別アルバム扱いする理由はないはず。意図的でないなら、この仕様を変えてください。音は最高です。

### 4/5 — CarPlay対応して頂きたい

*2026-06-10, version 3.7.8*

好きな音質に細かく調整可能。apple carplay で利用できないのが⭐️一個減

### 5/5 — 全て最高

*2026-06-03, version 3.7.8*

全て最高

### 4/5 — ストリーミング再生になっていないか要チェック

*2026-05-05, version 3.7.8*

itunesで購入した音楽はイコライザー等音質調整の使用はできなくなってしまいました。
残念ですが安定性で言えばミュージックアプリの方が上なのでもう使うことは無さそうです。
↑
機種変更に伴い、すべての曲がストリーミング再生になっていたことが原因でした。DLした曲は無事イコライザーの使用ができています。運営さんありがとうございます。
少し時間をおいてアプリを立ち上げた際にタスクキルをしないと動作をしないことがあるので⭐︎は4とさせていただきます。

### 5/5 — 高音質を求めるなら買う価値あり

*2026-04-15, version 3.7.8*

とても高音質で良いです。
他のアプリより音の粒が細かい気がします。中心から上下に音が広がるようなイメージを持ちました。

再生中にアルバムアートを下にスワイプで曲一覧に戻れる仕様を追加して頂けると大変助かります。

### 5/5 — 控えめに言って最高でした。

*2026-04-14, version 3.7.8*

一週間の無料期間とか有れば迷う事すらなく購入したかなぁと_(┐「ε:)_

### 4/5 — Good but needs fresh Design

*2026-03-21, version 3.7.8*

That‘s it. Good App and Great eq. But the Layout is very old and needs retouch. Some of the Sound setup points are too complex and useless cause they distort.

Still the best App. But please do something. I‘ll pay for a updated Version

### 1/5 — No volume increase, no way to contact

*2026-01-29, version 3.7.8*

Totally disappointed with this product.  While it does give good sound quality there was no audible increase in volume and no apparent way to increase do so.

### 1/5 — 気がつくとアプリが開かなくなってる

*2026-01-24, version 3.7.8*

検証して開くにはインターネット接続が必要です。と表示され、起動しなくなる。 インターネットに接続済みにもかかわらず出るのでバグで確定。

## Frequently asked questions about KaiserTone Audio Player +HiRes

### What is KaiserTone Audio Player?

KaiserTone Audio Player is a mobile application designed to deliver the highest quality audio playback. It features an advanced sound engine, extensive equalizer options, virtual surround sound, and supports high-resolution audio files.

### What are the key features of KaiserTone?

Key features include the 'Amazing Quality Sound Engine AQS-XI', playback of high-resolution sources up to 768kHz/32bits, support for DSD files, a comprehensive equalizer with multiple bands and presets, virtual surround sound, gapless playback, and silence detection.

### How much does KaiserTone Audio Player cost?

Based on the provided information, KaiserTone Audio Player is a paid application. There are no mentions of free tiers, subscriptions, or in-app purchases for core functionality.

### What devices is KaiserTone compatible with?

The application is compatible with iPhone 5 or later, iPod touch 7th and 6th generation, and iPad Pro, Air 2, and Air models. It requires iOS 11 or later for certain features like SNS posting.

### What kind of audio files can KaiserTone play?

KaiserTone supports a wide array of audio formats, including DSD, FLAC, WAV, Apple Lossless, AIFF, AAC, and MP3. It can also play music from your iTunes Library, with some restrictions on Apple Music and DRM-protected content.

## Version history (last 5 releases)

### 3.7.8 — 2025-12-21

■Latest update
1. iOS support
  (1) Adjustments for iOS26.2
2. Other enhancements

■ In iOS10 or Later, at the time of the first start-up,
 alert of "“KaiserTone” Would Like to Access Apple Music And Your Media Library" is displayed.
    At that time, “OK” should be selected for using a song in the iPod Library.

This player uses to playback musics in the iPod Library (iTunes Library).
This library is the data in the media library. In order to use the songs in the iPod Library, this question should have been set to "OK".

※"Don't Allow" was selected, it can not display all the songs in the iPod Library.

■　Resetting Method
Go to the Apple Settings app, Scroll down and Tap the KaiserTone, Enable "Media & Apple Music" or "Media Library" toggle.
 *This item name depends on the iOS version.

### 3.7.7 — 2025-11-02

■Latest update
1. iOS support
  (1) iOS 26/18.7 Operation confirmed
  (2) Added iPhone17, 17 Pro, 17 Pro Max, Air as a supported additional model
2. Other enhancements

■ In iOS10 or Later, at the time of the first start-up,
 alert of "“KaiserTone” Would Like to Access Apple Music And Your Media Library" is displayed.
    At that time, “OK” should be selected for using a song in the iPod Library.

This player uses to playback musics in the iPod Library (iTunes Library).
This library is the data in the media library. In order to use the songs in the iPod Library, this question should have been set to "OK".

※"Don't Allow" was selected, it can not display all the songs in the iPod Library.

■　Resetting Method
Go to the Apple Settings app, Scroll down and Tap the KaiserTone, Enable "Media & Apple Music" or "Media Library" toggle.
 *This item name depends on the iOS version.

### 3.7.6 — 2025-07-23

■Latest update
1. iOS support
  (1) Adjustments for iOS18.5
2. Other enhancements

■ In iOS10 or Later, at the time of the first start-up,
 alert of "“KaiserTone” Would Like to Access Apple Music And Your Media Library" is displayed.
    At that time, “OK” should be selected for using a song in the iPod Library.

This player uses to playback musics in the iPod Library (iTunes Library).
This library is the data in the media library. In order to use the songs in the iPod Library, this question should have been set to "OK".

※"Don't Allow" was selected, it can not display all the songs in the iPod Library.

■　Resetting Method
Go to the Apple Settings app, Scroll down and Tap the KaiserTone, Enable "Media & Apple Music" or "Media Library" toggle.
 *This item name depends on the iOS version.

### 3.7.5 — 2025-04-15

■Latest update
1. Adjustment of sound engine AQS-XI.
  (1) Supported automatic stereo conversion playback from Multi Channel (7.1ch, 5.1ch, ...) FLAC audio sources
2. iOS support
  (1) Adjustments for iOS18.4

■ In iOS10 or Later, at the time of the first start-up,
 alert of "“KaiserTone” Would Like to Access Apple Music And Your Media Library" is displayed.
    At that time, “OK” should be selected for using a song in the iPod Library.

This player uses to playback musics in the iPod Library (iTunes Library).
This library is the data in the media library. In order to use the songs in the iPod Library, this question should have been set to "OK".

※"Don't Allow" was selected, it can not display all the songs in the iPod Library.

■　Resetting Method
Go to the Apple Settings app, Scroll down and Tap the KaiserTone, Enable "Media & Apple Music" or "Media Library" toggle.
 *This item name depends on the iOS version.

### 3.7.3 — 2024-11-12

■Latest update
1. Other enhancements
  (1) Adjusted the LED display for device (DAC, Bluetooth) settings
  (2) Adjusted the behavior when switching devices (DAC, Bluetooth)

■ In iOS10 or Later, at the time of the first start-up,
 alert of "“KaiserTone” Would Like to Access Apple Music And Your Media Library" is displayed.
    At that time, “OK” should be selected for using a song in the iPod Library.

This player uses to playback musics in the iPod Library (iTunes Library).
This library is the data in the media library. In order to use the songs in the iPod Library, this question should have been set to "OK".

※"Don't Allow" was selected, it can not display all the songs in the iPod Library.

■　Resetting Method
Go to the Apple Settings app, Scroll down and Tap the KaiserTone, Enable "Media & Apple Music" or "Media Library" toggle.
 *This item name depends on the iOS version.

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## More apps by CyberFort LLC

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All apps by CyberFort LLC: https://appshunter.io/developer/569899155

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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 2026-08-26.*