Comparison

Harmonizer audio effect vs SpaceFields

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

Head to head
About

Harmonizer audio effect

This real-time audio effect app shifts pitch and adds harmonies to your original sound. It functions as an Audio Unit plugin or a standalone effect using your device's microphone or external audio interfaces. The pitch shifting preserves the original timing and tempo.

Highlights
  • Real-time pitch shifting
  • Two harmony voices
  • Smooth pitch shift controls
  • Adjustable voice volumes
  • Master reverb effect
  • Standalone mode via microphone
Features
Read full description

Harmonizer is real time audio pitch shifter effect that can mix harmonies into the original signal or run as realtime pitch shifter. The app works as an Audio Unit plugin and can also be used as stand alone real time effect via the device microphone or using iRig or similar device. The pitch shifting does NOT affect timing so the tempo stays the same. Features: - 2 harmony voices - smooth pitch shift controls - half tones and cents - dry volume (original voice) - efx 1 volume (pitch shifted voice 1 volume) - efx 2 volume (pitch shifted voice 2 volume) - reverb (master reverb) - EFX on/off button (in stand alone mode) If you play acoustic instrument you can use headphones without a mic and put the phone close to your instrument so the app will work as realtime effect. Now you can play and sing with harmonies.

About

SpaceFields

Create evolving rhythmic soundscapes from any audio source. This app uses a loop-based system with dual loops, pitch shifting, and effects to generate ambient textures and rhythmic structures. Experiment with complex sound design using intuitive controls and randomization.

Highlights
  • Loop-based sound mangling
  • Dual loop recorder
  • Pitch shifting and effects
  • Convolution reverb with deep spaces
  • Rhythmic structure generation
  • Automation generators with randomization
  • Live and sample processing modes
Features
Read full description

Loop-based mangler effect to create slowly changing rhythmic sound structures in deep reverb space from any external sources or samples. Great for experimenting and designing ambient and noise backgrounds with rhythmic elements. The principle of the application is quite simple. It is based on a loop recorder with two loops. When one loop is recorded, the second is played back. When the loop recording stops, there is a smooth transition between them. Three separate outputs can playback the recorded loop with different pitches (speeds), each with its own effects and two automation generators. The mix of these outputs is fed to the convolution reverb. The reverb is packed with a set of long and deep sound spaces that create a blurry and ambient sound. But the main feature of this application is its well designed parameters that make it easy to experiment with a huge number of sound options using any source material from live instruments to synthesized sound. With just two parameters you can add complex rhythmic structures based on Euclidean rhythms, and easy-to-use automation generators with a randomize option to add variations to the sound, allowing you to modify parameters like an LFO or based on a given rhythm. The convolution reverb has advanced options with which you can change and extend the original reverb spaces. Even using the randomization options, in almost every case, you will get interesting and various soundscapes and textures. With these options it is very easy to create the basis for new unique presets. It only takes a little tweaking of some parameters to get impressive results. The loop recorder can be started and stopped manually or by input signal, can use fixed length or overwrite the loop while recording, and has the option for crossfade between the end and the beginning of the loop. All this makes it convenient for live use as well as when processing recorded material. As an extended option, you can use a special mode in which the application works as a direct effect, without the loop recorder. The special mode sampler is designed for quickly load samples and easy control of the application when used it live. This panel contains the input and output controls, essential controls of the loop recorder, and a large area with a recording counter, which is also used to start/stop the recorder. You can assign up to nine samples for fast loading into the loop, as well as save a recorded loop as a sample and to an external file. SpaceFields is a universal application for iOS and macOS. It can work on iPhone and iPad as well as Mac / MacBook with M1 chip (and later). SpaceFields works on iPhone and iPad standalone, as an Audio Unit or Inter-App Audio module, with supports Audiobus host app. On MacOS, SpaceFields can works both as a standalone application and as an Audio unit (AUv3) with DAWs and other hosts that support AUv3 plugins. All application features are available on iOS and macOS, including MIDI support (with a MIDI learn option), audio unit parameters and importing samples from any directory on device. SpaceFields has a built-in detailed description of all parameters also available as PDF file on the application site. Demos and previews: https://www.youtube.com/watch?v=cL1Dis3u0AQ https://www.youtube.com/watch?v=TpkWkc5I0uE https://www.youtube.com/watch?v=74LyfDM2dQM You can find more information on SpaceFields and other creative audio apps at: https://motion-soundscape.blogspot.com

Screenshots

Harmonizer audio effect3 screens
SpaceFields4 screens

Verdict

The call

The clearest difference is review sentiment: SpaceFields at 90% against Harmonizer audio effect's 23%. SpaceFields also leads on rating (4.7 vs 3.0) and update cadence (every 2 months vs every 8 months). Harmonizer audio effect's advantage is price ($1.99 vs $10.99) and iOS requirement (10.0 vs 13.4). On ads, in-app purchases, monetization model 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

Harmonizer audio effect costs $1.99 and SpaceFields $10.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SpaceFields holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: SpaceFields has 47 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 23% of Harmonizer audio effect's written reviews are positive against 90% of SpaceFields's.

UpkeepUpdate frequency

Harmonizer audio effect ships an update every 8 months, SpaceFields every 2 months. The most recent releases landed on September 20, 2026 and September 27, 2026 respectively.

Scorecard6 real differences · 4 level
Harmonizer audio effect versus SpaceFields: the parameters behind the verdict, then further details
ParameterHarmonizer audio effectSpaceFields
Price$1.99 — better$10.99
Rating3.0 (9 ratings)4.7 (47 ratings) — better
Positive reviews23.1% of reviews90.5% of reviews — better
Number of ratings947 — better
Update frequencyEvery 8 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better13.4
Further details — not scored
Size14 MB132 MB
Age rating4+4+
DeveloperAleksandar MlazevIgor Vasiliev

Customer experience

Harmonizer audio effect

All ratings9 ratings
Positive44.4%
Neutral0.0%
Negative55.6%
Written reviews13 reviews
Positive23.1%
Neutral0.0%
Negative76.9%

SpaceFields

All ratings47 ratings
Positive91.5%
Neutral2.1%
Negative6.4%
Written reviews21 reviews
Positive90.5%
Neutral0.0%
Negative9.5%

In-app purchases

None

Harmonizer audio effect

No in-app purchases

None

SpaceFields

No in-app purchases

Questions

Is Harmonizer audio effect free?
Harmonizer audio effect costs $1.99, with no in-app purchases.
Is SpaceFields free?
SpaceFields costs $10.99, with no in-app purchases.
Which has better reviews, Harmonizer audio effect or SpaceFields?
SpaceFields is rated higher. Harmonizer audio effect averages 3.0 out of 5 from 9 ratings, while SpaceFields averages 4.7 from 47 ratings.
Do Harmonizer audio effect or SpaceFields have ads?
Neither Harmonizer audio effect nor SpaceFields shows ads.
Which is updated more often, Harmonizer audio effect or SpaceFields?
Harmonizer audio effect ships an update every 8 months, and SpaceFields every 2 months. Most recently, Harmonizer audio effect was updated on September 20, 2026 and SpaceFields on September 27, 2026.

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