Comparison

Holon vs FrobulatorAU

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

Head to head
About

Holon

This app transforms your movement through cities into a dynamic, real-time musical score. It uses your physical location and activity to generate interactive synth music, encouraging outdoor exploration and turning listeners into performers.

Highlights
  • Human-powered music generation
  • Encourages outdoor activity
  • Zero UI for minimal distraction
  • Environmentally responsive music
  • Real-time synth music creation
  • Optional AirPods and Apple Watch integration
Features
Read full description

Holon makes the city your instrument. It turns your movement in the environment into a synthetic, interactive score that reflects your context, supports your activities and alerts you to changes in the surrounding area. Holon uses physical computing and a geospatial dataset to synthesize music on the iPhone in real time from your data - no streaming or AI involved, just pure DSP and logic. What Holon Does: * Human powered music. Every action generates dynamic, improvised synth music in real time. * Encourages outdoor activities. Holon doesn’t work in your apartment or by shaking your phone around. Move through streets, parks, and transit systems to make the music happen. * Stays out of your way. Zero UI means less screen time, no distractions. * Uses places and spaces to modify the music you make. The environment isn’t background - it’s the score. * The more and further you move, the more things happen in the music. Use your musical agency instead of skipping and swiping. Why Holon Exists:
 Music has been reduced to a commodity and a background activity for consumerism. Holon isn’t here to help you chill when you swipe, scroll and buy more stuff, or improve your focus when working for the Man. Holon is here to break away from the static, one-way relationship of streaming services and to put the human in the loop - yourself. Forget emoting celebrities with their false sincerity, throw overproduced passive soundscapes and statistical algorithms on the dung heap of history. Holon turns listeners into performers and unlocks the musical potential of places. How to Use: * Go outside - Holon needs space to function, just like you. Different districts, parks, bridges, shops, street furniture - all contribute to the musical output. Strolling around your apartment or shaking your phone won’t do. * Put the phone in your pocket or on your dashboard. * Walk, run, drive - the world is now the interface, space is the machine. * Use the big button in the middle to power Holon off when not in use - Auditory AR can be a battery-intensive process! * Optional Apple AirPods support for head-controlled musical interactions! * Optional Apple Watch support for heart rate-synced music (biofeedback) *the Watch app may take a moment to install* Requirements:
 * Available in over 1000 regions in more than 100 countries. * Check coverage or request a new area at holonic.systems/holon. * Best experienced with headphones. Ensure adequate battery level for extended use. * A data plan is required to access our geospatial engine but use of data is low. Holon: Become part of the circuit and… Become Sound™

About

FrobulatorAU

This audio effect plugin transforms sounds with spectral delay, adding unique character to music projects. It's a free and open-source tool designed for use in various audio applications, offering extensive creative possibilities.

Highlights
  • Spectral delay effect
  • AUv3 plugin
  • Use in GarageBand, AUM, and other DAWs
  • Multiple instances per project
  • Free and open-source
  • No ads or in-app purchases
Features
Read full description

Venerable inter-app audio effect Frobulator reborn — at long last — as an AUv3 plugin. Use it in GarageBand, AUM or your favourite audio application. Add multiple instances in the same project. Drag your frobulation kicking and screaming into the 21st century. Frobulator is a spectral delay effect. It makes your noises a little bit stranger. Twiddle the knobs to find something you like, or don't and throw it away. No-one will hold it against you. Frobulator is free as in beer and free as in speech. Freer, probably, given the state of both those things these days. No ads, no in-app purchases, no subscriptions, no surveillance, no nag screens. If you happen to be one of the 6 people who asked for this, rejoice! If you aren't, now's your chance to discover what you've been missing all this time. Or not. I'm not the boss of you.

Screenshots

Holon4 screens
FrobulatorAU1 screens

Verdict

The call

The clearest difference is rating: FrobulatorAU at 5.0 against Holon's 4.5. FrobulatorAU also leads on in-app purchases (none vs 2) and update cadence (every 9 days vs every 3 months). Holon's advantage is device support (4 vs 2) and iOS requirement (12.0 vs 17.0). On price, ratings volume and ads 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

Both are free to download. Holon sells 2 one-off in-app purchases. FrobulatorAU asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FrobulatorAU holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 14 and 8 respectively.

UpkeepUpdate frequency

Holon ships an update every 3 months, FrobulatorAU every 9 days. The most recent releases landed on October 19, 2026 and October 17, 2026 respectively.

Scorecard6 real differences · 4 level
Holon versus FrobulatorAU: the parameters behind the verdict, then further details
ParameterHolonFrobulatorAU
PriceFreeFree
Rating4.5 (14 ratings)5.0 (8 ratings) — better
Positive reviews75.0% of reviews—
Number of ratings14 — better8
Update frequencyEvery 3 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size144 MB2 MB
Age rating4+4+
DeveloperHolonic Systems OyMatthew Caldwell

Customer experience

Holon

All ratings14 ratings
Positive85.7%
Neutral7.1%
Negative7.1%
Written reviews12 reviews
Positive75.0%
Neutral8.3%
Negative16.7%

FrobulatorAU

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Holon

One-time2
  • Apple Watch supportFree
  • Movesense SupportFree
None

FrobulatorAU

No in-app purchases

Questions

Is Holon free?
Holon is free to download, with in-app purchases available.
Is FrobulatorAU free?
FrobulatorAU is free to download, with no in-app purchases.
Which has better reviews, Holon or FrobulatorAU?
FrobulatorAU is rated higher. Holon averages 4.5 out of 5 from 14 ratings, while FrobulatorAU averages 5.0 from 8 ratings.
Do Holon or FrobulatorAU have ads?
Neither Holon nor FrobulatorAU shows ads.
Which is updated more often, Holon or FrobulatorAU?
Holon ships an update every 3 months, and FrobulatorAU every 9 days. Most recently, Holon was updated on October 19, 2026 and FrobulatorAU on October 17, 2026.

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