AUM vs Decent Sampler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AUM
This app is a versatile audio mixer, recorder, and connection hub for mobile devices. It allows users to connect various audio sources, route signals, apply effects, and record mixes with high fidelity. It supports advanced features like MIDI control, synchronization, and integration with other audio apps and hardware.
- Connect hardware inputs/outputs
- Route audio and MIDI
- Host Audio Unit extensions
- Record mixes and individual tracks
- Synchronize with Ableton Link
- Built-in processing nodes
- MIDI control and routing
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AUM is the flexible audio mixer, recorder, and connection hub for your iPad, iPhone and iPod touch. Connect hardware inputs and outputs, Audio Unit extensions, Inter-App Audio apps, Audiobus, soundfile players, built-in signal processing and filters, in any configuration you want. Route anything to anywhere with mix-busses, effect sends, audiobus ports, and external multi-channel audio interfaces. Play hosted synths and instruments using the built-in keyboard or external MIDI controllers, or sequence them with AU MIDI plugins or from other apps using Virtual MIDI. Record mixes, individual tracks, or both, straight into the storage space of AudioShare (no copying of files needed), with synchronized start and end for perfect loops. Play back recordings, soundfiles and loops as channel sources in the mixer for backing tracks, further processing or mixing. Soundfiles can be opened from anywhere, including USB drives on iOS 13 and later. Route and filter MIDI in any way you like using the MIDI matrix. Combine and filter MIDI endpoints using MIDI buses. Synchronize everything with the transport clock and play in time with other apps or devices using Ableton Link. Connect external music machines and synchronize them with MIDI Clock. Includes built-in processing nodes for various stereo processing, Mid/Side balance and conversion, EQs and filters, limiting, clipping and saturation. Or use any 3rd party Audio Unit extension or Inter-App Audio effect. All controls in the mixer can be controlled via MIDI, including parameters of hosted and built-in plugins. "A brilliant idea that has been brilliantly executed. Top-notch technical stuff and highly recommended" - MusicAppBlog "Feature rich, powerful, intuitive, and simple to use" - DubSpot "Executes live mixing with surprising ease, with a load of extensive features under the hood, quick snappy response on the screen and audio" - AudioNewsRoom FEATURES • High quality audio up to 32-bit 192kHz • Clean and intuitive user interface with crisp vector graphics • Unlimited number of channels • Unlimited number of effect slots • Inserts and sends are configurable pre/post-fader • Internal busses for mixing, effect sends, signal splitting • Supports multi-channel audio interfaces for both inputs and outputs • Supports built-in speaker and mic, including stereo mic on devices that has it. • Supports Audio Unit extensions, Inter-App Audio and Audiobus • Route MIDI output from Audio Unit extensions • Supports Audio Unit multiple output and input busses (for side-chaining etc) • Highly accurate transport clock • Metronome with selectable output and optional pre-roll • Sends host sync to Audio Unit plugins and IAA apps • Play in time with Ableton Link, with Start/Stop support • Slave external hardware via MIDI Clock • FilePlayer with sync and looping with access to all your soundfiles • Records straight into AudioShare storage space • Record synchronized beat-perfect loops • Built-in nodes for stereo processing, filtering and dynamics • Latency compensation makes everything align at the outputs • Optional manual compensation using TimeOffset • Multiple Inter-App Audio / Audiobus output ports • Audiobus state saving • Built-in MIDI keyboard • Fully MIDI controllable • MIDI Matrix for routing MIDI anywhere • MIDI filtering for any MIDI destination • Combine MIDI sources or destinations using MIDI buses BUILT-IN SIGNAL PROCESSING • Stereo balance • Stereo to mono • Stereo panning • Mid/Side balance • Mid/Side - Stereo convert • Invert Phase • Parametric EQ • Low-shelf filter • High-shelf filter • Low-pass resonant filter • High-pass resonant filter • LP/HP combo filter • First order All-pass filter • Second order All-pass filter • Gain • Hard clip • Saturation • Lookahead peak limiter • System-provided Apple Audio Units
Decent Sampler
This music app lets you use professional-quality sample libraries on your mobile device. It supports Decent Samples libraries and SFZs, and can be used within other music production apps as an AUv3 plugin.
- Use professional sample libraries
- Supports Decent Samples libraries
- Supports SFZ files
- AUv3 plugin compatibility
- Standalone app functionality
- New libraries added weekly
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Did you ever wish you could use professional quality sample libraries on your mobile device? Now you can! The Decent Samples plugin is a sample player that allows you to use your favorite Decent Samples sample libraries on the go (as well as SF2s, SFZs, and EXS files). Many of the most popular Decent Samples releases are available through the app with more being added every week. Because it's also an AUv3 plugin, you can use it from within GarageBand or with AUM.
Screenshots
Verdict
The clearest difference is price: Decent Sampler at Free against AUM's $24.99. Decent Sampler also leads on update cadence (weekly vs every 3 months). AUM's advantage is review sentiment (82% vs 52%) and ratings volume (534 vs 53). On rating, 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
Decent Sampler is free to download; AUM costs $24.99 up front. AUM sells 4 one-off in-app purchases and Decent Sampler sells 60 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for AUM against 4.6 for Decent Sampler. That said, the two scores are not equally well evidenced: AUM has 534 ratings behind it against 53, so its average is the more settled of the two. Written reviews are what separate them: 82% of AUM's written reviews are positive against 52% of Decent Sampler's.
AUM ships an update every 3 months, Decent Sampler weekly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | AUM | Decent Sampler |
|---|---|---|
| Price | $24.99 | Free — better |
| Rating | 4.7 (534 ratings) — better | 4.6 (53 ratings) |
| Positive reviews | 81.9% of reviews — better | 52.2% of reviews |
| Number of ratings | 534 — better | 53 |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #85 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 13 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Kymatica AB | Decidedly, LLC |
Customer experience
AUM
Decent Sampler
User reviews
AUM
From 534 App Store ratingsWhat we love
- 👍 Excellent audio routing and mixing capabilities
- 🚀 Powerful and flexible workflow
- 💡 Seamless integration with AUv3 and IAA apps
- 👍 Intuitive and clean user interface
- 👍 Reliable and stable performance
Room to improve
- 🐛 Occasional crashes or stability issues
- 💡 Lack of MIDI clock sync receive functionality
- 💡 Limited visual customization options (e.g. channel sizes)
- 🐛 Compatibility issues with some hardware interfaces
Decent Sampler
From 53 App Store ratingsWhat we love
- 🎶 Great sounds and libraries
- 🎹 Powerful sampler for iOS
- 💡 Free sample packs available
- ✨ High-quality instruments
- 🔄 Actively developed with updates
Room to improve
- 🐛 Frequent crashes and instability
- 💾 High RAM and storage usage
- 🔌 Issues with Logic Pro on iOS
- 🐌 Slow download manager
- 🤷♂️ Not working with older iPads
Bugs and requests
AUM
Reported bugs
3 issues- Crashes or freezes when using certain plugin combinations
- Compatibility issues with iOS 15 and newer
- Inconsistent MIDI transport controls
Requested features
4 requests- Add MIDI clock sync receive capability
- Implement a timeline/sequencer view
- Provide more visual customization options
- Improve support for external hardware integration
Decent Sampler
Reported bugs
23 issues- Instant crash on load
- App stopped working after iOS update
- AUV3 crashes out of nowhere
- Unresponsive upon opening
- Server issues for login
Show 18 moreShow fewer
- Instrument remains stuck on a note
- Projects need to be reloaded to show app
- Crash when loading samples
- Failing to load presets when reloading host project
- Adding unwanted temp presets
- Crashing when selecting different samples
- Login prompt won't let paste text
- Can't paste password to login
- Login screen covered by keyboard
- Error 500 when downloading
- Restore Purchases button not working
- Forgotten Password button not working
- Invalid email address for registration
- No URL found when downloading sound packs
- Clicking sounds while using
- Glitching, clicking, and ghost sounds on held notes
- Instrument crashes after a few minutes
- Earthquake pad 02 glitching
Requested features
14 requests- Add user/pass fill from password keeper
- Implement a download manager for multiple instruments
- Allow running within IAA or Audiobus
- Add ability to clear cache
- Fix multi-track support in AUV3
Show 9 moreShow fewer
- Add MIDI sequencing
- Add pitch bend functionality
- Add velocity response curve knob
- Add filter stage and more flexible envelope
- Allow disabling iOS auto-lock
- Configure receiving MIDI channel
- Improve preset selection
- Add dark mode
- Support VoiceOver
In-app purchases
AUM
- Small Tip$0.99
- Medium Tip$1.99
- Large Tip$4.99
Show 1 moreShow fewer
- Huge Tip$9.99
Decent Sampler
- Box ViolinFree
- Dave ChoirFree
- Resonator GlockenspielFree
Show 57 moreShow fewer
- Banjo UkuleleFree
- KalimbaFree
- Ukelin$0.99
- Decent Sampler Store Item 3$2.99
- Decent Sampler Store Item 4$3.99
- Weber 1929 Baby Grand$4.99
- Ramshackle Zither$4.99
- Decent Sampler Store Item 5$4.99
- Music Major Sample Library$4.99
- Sawblade Kalimba Library$4.99
- Melodica$4.99
- Distance: Zero$4.99
- Little Church Organ$4.99
- Indie Guitar$5.99
- Decent Sampler Store Item 6$5.99
- Decent Sampler Store Item 7$6.99
- Paper Drums$6.99
- Relic Keyboard$7.99
- Decent Sampler Store Item 8$7.99
- HS-3715 Keyboard$7.99
- Malevolence by Venus Theory$8.99
- Viola Ensemble$9.99
- Indie Bass$9.99
- Metal Cups$9.99
- Phonoharp$9.99
- Violin Ensemble$9.99
- Ethereal Vocals$9.99
- Decent Sampler Store Item 10$9.99
- Kalimba by Darel$9.99
- Dangerous Undertones$9.99
- Chroma Vol. 1$9.99
- Luminate$9.99
- Horror Box$9.99
- Tape Violins Sample Library$10.99
- Decent Sampler Store Item 11$11.00
- Interlaced Sample Library$14.99
- Decent Sampler Store Item 15$15.00
- Decent Sampler Store Item 16$16.00
- Decent Sampler Store Item 19$19.00
- alt.strings$19.99
- Felt & Fog$19.99
- Organic Orchestra$19.99
- Indie Drums$19.99
- Bitscape 95$19.99
- Thyssia by Venus Theory$19.99
- Decent Samples Store Item 20$20.00
- Decent Samples Store Item 24$24.00
- The Void$24.99
- Processed Guitars$24.99
- Decent Samples Store Item 25$25.00
- String Flows$29.99
- 70s Summer Camp Sample Library$29.99
- Decent Samples Store Item 30$30.00
- LoFi VaporTones Ds$33.99
- Decent Samples Store Item 39$39.00
- Decent Samples Store Item 40$40.00
- Chamberlin M1 by Jamie Lidell$49.99









