Comparison

Hum vs AUM

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

Head to head
About

Hum

Capture and organize all your songwriting ideas in one place. This app combines lyric writing, note-taking, and audio recording. Keep your creative output sorted by various tags and backed up to Dropbox.

Highlights
  • Lyric writing
  • Note-taking
  • Audio recording
  • Tagging and sorting
  • Dropbox backup and sync
  • Built-in tuner
Features
Read full description

Hum combines lyric-writing, note-taking, and audio recording into a single app for capturing and organizing all your songwriting ideas. Hum keeps your lyrics and song ideas organized and sortable so you never lose anything again. Hum keeps everything backed up and in sync with Dropbox. • Tag and sort any of your lyrics and riffs by key, tuning, tonality, color, and mood. • Share your ideas via email or iMessage. • Import audio from other apps. • Keep a page of notes for each song, separate from your lyrics. • Play your ideas straight from the library—no need to tap into a song to audition your ideas. • Keep organized with folders • Keep your library backed up and in sync with Dropbox. • Stay in tune with a built-in tuner. If you’ve enjoyed using Hum, please leave a review.

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
Currently charting
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

Screenshots

Hum4 screens
AUM4 screens

Verdict

The call

The clearest difference is price: Hum at $2.99 against AUM's $24.99. Hum also leads on in-app purchases (none vs 4) and update cadence (every 2 months vs every 3 months). AUM's advantage is rating (4.7 vs 3.7) and ratings volume (534 vs 44). On review sentiment, ads, device support and iOS requirement 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

Hum costs $2.99 and AUM $24.99 up front. AUM sells 4 one-off in-app purchases. Hum asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AUM holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: AUM has 534 ratings behind it against 44, so its average is the more settled of the two. Written reviews split almost evenly too, at 81% and 82% positive.

UpkeepUpdate frequency

Hum ships an update every 2 months, AUM every 3 months. Both last shipped on October 21, 2026.

Scorecard7 real differences · 4 level
Hum versus AUM: the parameters behind the verdict, then further details
ParameterHumAUM
Price$2.99 — better$24.99
Rating3.7 (44 ratings)4.7 (534 ratings) — better
Positive reviews81.1% of reviews81.9% of reviews — better
Number of ratings44534 — better
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#124 — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better12.0
Further details — not scored
Size67 MB13 MB
Age rating4+4+
DeveloperJust HumKymatica AB

Customer experience

Hum

All ratings44 ratings
Positive63.6%
Neutral6.8%
Negative29.5%
Written reviews95 reviews
Positive81.1%
Neutral4.2%
Negative14.7%

AUM

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

Bugs and requests

Hum

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

Hum

No 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

Questions

Is Hum free?
Hum costs $2.99, with no in-app purchases.
Is AUM free?
AUM costs $24.99, and also offers in-app purchases.
Which has better reviews, Hum or AUM?
AUM is rated higher. Hum averages 3.7 out of 5 from 44 ratings, while AUM averages 4.7 from 534 ratings.
Do Hum or AUM have ads?
Neither Hum nor AUM shows ads.
Which is updated more often, Hum or AUM?
Hum ships an update every 2 months, and AUM every 3 months. Most recently, Hum was updated on October 21, 2026 and AUM on October 21, 2026.

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