Comparison

AUM vs Bluetooth MIDI Connect

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Bluetooth MIDI Connect

Wirelessly connect Korg's Bluetooth MIDI controllers to your iPhone or iPad. This app enables seamless integration for a variety of Korg devices, enhancing your mobile music production setup.

Highlights
  • Wireless Bluetooth MIDI connection
  • Connects to Korg controllers
  • Compatible with iPhone/iPad
  • Seamless integration for music production
Read full description

Korg's Bluetooth MIDI Connect allows you to easily connect Korg's Bluetooth MIDI compatible controllers such as microKEY Air, nanoKEY Studio, nanoKONTROL Studio wirelessly with your iPhone/iPad.

Screenshots

AUM4 screens
Bluetooth MIDI Connect3 screens

Verdict

The call

The clearest difference is review sentiment: AUM at 82% against Bluetooth MIDI Connect's 25%. AUM also leads on rating (4.7 vs 2.5) and update cadence (every 3 months vs every 44 months). Bluetooth MIDI Connect's advantage is price (Free vs $24.99) and in-app purchases (none vs 4). On ads and device support 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

Bluetooth MIDI Connect is free to download; AUM costs $24.99 up front. AUM sells 4 one-off in-app purchases. Bluetooth MIDI Connect asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AUM holds the better App Store score, 4.7 against 2.5. That said, the two scores are not equally well evidenced: AUM has 535 ratings behind it against 60, so its average is the more settled of the two. Written reviews point the same way: 82% of AUM's written reviews are positive against 25% of Bluetooth MIDI Connect's.

UpkeepUpdate frequency

AUM ships an update every 3 months, Bluetooth MIDI Connect every 44 months. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

Scorecard8 real differences · 2 level
AUM versus Bluetooth MIDI Connect: the parameters behind the verdict, then further details
ParameterAUMBluetooth MIDI Connect
Price$24.99Free — better
Rating4.7 (535 ratings) — better2.5 (60 ratings)
Positive reviews81.9% of reviews — better24.5% of reviews
Number of ratings535 — better60
Update frequencyEvery 3 months — betterEvery 44 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.09.0 — better
Further details — not scored
Size13 MB3 MB
Age rating4+4+
DeveloperKymatica ABKORG INC.

Customer experience

AUM

All ratings524 ratings
Positive93.3%
Neutral1.5%
Negative5.2%
Written reviews315 reviews
Positive81.9%
Neutral5.7%
Negative12.4%

Bluetooth MIDI Connect

All ratings60 ratings
Positive36.7%
Neutral5.0%
Negative58.3%
Written reviews151 reviews
Positive24.5%
Neutral4.6%
Negative70.9%

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

Bluetooth MIDI Connect

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

AUM

One-time4
  • Small Tip$0.99
  • Medium Tip$1.99
  • Large Tip$4.99
Show 1 more
  • Huge Tip$9.99
None

Bluetooth MIDI Connect

No in-app purchases

Questions

Is AUM free?
AUM costs $24.99, and also offers in-app purchases.
Is Bluetooth MIDI Connect free?
Bluetooth MIDI Connect is free to download, with no in-app purchases.
Which has better reviews, AUM or Bluetooth MIDI Connect?
AUM is rated higher. AUM averages 4.7 out of 5 from 535 ratings, while Bluetooth MIDI Connect averages 2.5 from 60 ratings.
Do AUM or Bluetooth MIDI Connect have ads?
Neither AUM nor Bluetooth MIDI Connect shows ads.
Which is updated more often, AUM or Bluetooth MIDI Connect?
AUM ships an update every 3 months, and Bluetooth MIDI Connect every 44 months. Most recently, AUM was updated on November 11, 2026 and Bluetooth MIDI Connect on November 6, 2026.

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