Comparison

KaiserTone Audio Player +HiRes vs GM Sampler

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KaiserTone Audio Player +HiRes

Experience unparalleled audio quality with advanced sound engine features like a multi-band equalizer, virtual surround, and gapless playback. This app supports a wide range of high-resolution audio formats and offers extensive customization for a personalized listening experience.

Highlights
  • 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
  • Supports DSD, FLAC, WAV, and more formats
  • Customizable design with 24 colors
Features
Read full description

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 6s or later, iPod touch 7, 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 (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 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

About

GM Sampler

This app is a professional audio sampler and timer designed for live event operation, including tabletop RPG sessions and theater. It allows users to trigger music and sound effects, organize audio by scene, and manage timing cues from a mobile interface.

Highlights
  • 16-pad soundboard with 100 pages
  • Flexible playback modes (polyphony, monophonic, crossfade)
  • Detailed pad customization (name, color, loop, gain)
  • Fast audio import from cloud services
  • Fullscreen timer (stopwatch/countdown)
  • Backup and sharing of setups
  • Bluetooth speaker keepalive
Features
Read full description

GMApp is a professional audio sampler and timer for game masters, tabletop RPG sessions, murder mystery events, theater, rehearsals, streaming, and live event operation. It helps you trigger music and sound effects at the right moment, organize large sound sets by scene, and run sessions from a clean mobile interface. Designed for live use Run background music, one-shot effects, ambience, scene transitions, and timing cues from one iPhone or iPad. GMApp is built for hosts and operators who need quick, confident control during a performance or session. Who it is for - Murder mystery and story game hosts - Tabletop RPG GMs and keepers - Theater, rehearsal, reading, and small-stage sound operators - Streamers and event hosts who need reliable BGM and SFX playback - Creators managing many audio files across multiple scenes Core features 16-pad soundboard with up to 100 pages Each page provides a 4 x 4 pad layout. Create up to 100 pages, for a total of 1,600 pads, and organize sound cues by scenario, chapter, act, location, battle, or scene. Flexible playback modes Choose the right behavior for each pad or session: - Polyphony: layer ambience, BGM, and sound effects together. - Monophonic: switch cleanly between single sound sources. - Crossfade: transition naturally between music tracks, with adjustable fade time. Tap behavior can also be set to retrigger from the beginning or toggle pause/resume. Detailed pad customization Customize each pad with a display name, color, loop setting, and gain level. Color-coded pads and clear names make it easier to operate under pressure during a live session. Fast audio import Import local audio files from the iOS share sheet, Google Drive, Dropbox, or ZIP archives. This makes it easy to prepare a full show, session, or scenario audio set in advance. Bluetooth speaker keepalive option For long quiet scenes, optional wireless speaker keepalive playback can help reduce the chance of Bluetooth or AirPlay speakers sleeping between cues. Fullscreen timer for sessions and events Use stopwatch or countdown mode, from short scene timers to long event blocks. Fullscreen mode makes the timer easy for everyone at the table or in the room to see. Backup and sharing Export and import page-level ZIP packages and full backups. Move setups between devices, preserve a production-ready sound board, or share cue structures with another operator. Audio formats AAC, AIF, AIFF, CAF, FLAC, M4A, MP3, OGG, and WAV are supported. Compatibility may vary by device and OS. GMApp is made for creators who want the story, scene, or performance to flow without fighting the sound board. Legal notice: https://gmapp.souko.work/tokusho

Screenshots

KaiserTone Audio Player +HiRes4 screens
GM Sampler4 screens

Verdict

The call

The clearest difference is price: GM Sampler at $1.99 against KaiserTone Audio Player +HiRes's $9.99. KaiserTone Audio Player +HiRes's advantage is review sentiment (78% vs 50%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

KaiserTone Audio Player +HiRes costs $9.99 and GM Sampler $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

KaiserTone Audio Player +HiRes ships an update every 2 months, GM Sampler every 5 weeks. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

Scorecard2 real differences · 8 level
KaiserTone Audio Player +HiRes versus GM Sampler: the parameters behind the verdict, then further details
ParameterKaiserTone Audio Player +HiResGM Sampler
Price$9.99$1.99 — better
Rating4.6 (214 ratings) — better—
Positive reviews78.3% of reviews — better50.0% of reviews
Number of ratings214 — better—
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size36 MB99 MB
Age rating4+4+
DeveloperCyberFort LLCtakashi masuda

Customer experience

KaiserTone Audio Player +HiRes

All ratings214 ratings
Positive90.2%
Neutral2.8%
Negative7.0%
Written reviews244 reviews
Positive78.3%
Neutral5.3%
Negative16.4%

GM Sampler

Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Bugs and requests

KaiserTone Audio Player +HiRes

Reported bugs

6 issues
  • 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
Show 1 more
  • DRM-protected songs not playable

Requested features

6 requests
  • 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
Show 1 more
  • Enhance user interface design

GM Sampler

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

KaiserTone Audio Player +HiRes

No in-app purchases

None

GM Sampler

No in-app purchases

Questions

Is KaiserTone Audio Player +HiRes free?
KaiserTone Audio Player +HiRes costs $9.99, with no in-app purchases.
Is GM Sampler free?
GM Sampler costs $1.99, with no in-app purchases.
Do KaiserTone Audio Player +HiRes or GM Sampler have ads?
Neither KaiserTone Audio Player +HiRes nor GM Sampler shows ads.
Which is updated more often, KaiserTone Audio Player +HiRes or GM Sampler?
KaiserTone Audio Player +HiRes ships an update every 2 months, and GM Sampler every 5 weeks. Most recently, KaiserTone Audio Player +HiRes was updated on November 6, 2026 and GM Sampler on November 9, 2026.

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