Comparison

Harmony Eight vs spectwhirl

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

Head to head
About

Harmony Eight

Create up to eight distinct pitch-shifted voices from your audio input. Position each voice in stereo space, alter their character from male to female, and apply individual feedback delays for intricate rhythms. Offers advanced audio processing including EQ, compression, and reverb.

Highlights
  • 8-voice pitch shifting with formant correction
  • Independent delay lines with sync
  • Spatial voice positioning
  • Vocal character modification
  • Parametric EQ, Compressor, Limiter, Noise Gate
  • Ensemble and Reverb effects
  • AUv3, Inter-app audio, Audiobus support
Features
Read full description

Up to eight pitch shifted voices are created from vocal input or instruments. Separate algorithms for optimal shifting of vocals/monophonic instruments and for any other kind of audio. Position each voice in space ( left and right / front and back ) Modify the voice character from male to female and vice versa. Pitch shift each voice in the range of +/- one octave with preserving of formants for natural sound. Applying separate feedback delays on each voice creates complex rhythmical patterns. Features: • 8 Voice Pitch Shifter with formant correction • Optional shifting algorithm for polyphonic sounds • 8 Independent delay lines with optional sync • Spatial voice positioning • Parametric Equalizer • Integrated Compressor/Limiter/Noise Gate • Ensemble effect • Reverb effect • AudioUnit for AUv3 compatible hosts. • Inter-app audio compatible effect. • Audiobus 2 compatible with state saving. • Support for Ableton Link • Low latency live usage with mic and headphones. • Audio recorder

About

spectwhirl

This audio effect app transforms input sound into new textures and bell-like tones by extracting and manipulating sinewave components. It offers advanced control over delay lines, frequency shifting, and filtering, with gesture recording for parameter automation.

Highlights
  • Sinewave component extraction and grouping
  • Delay lines with feedback
  • Frequency shifter and sample-and-hold effects
  • Configurable filtering
  • Gesture recording for automation
  • Scene saving and management
Features
Read full description

"bells and whistles, literally" spectwhirl is a hybrid spectral audio effect. It can extract and rearrange sinewave components from input signal to make new sound textures and bell-like sounds. * input sound is converted to sinewave components that are divided into 4 groups: harmonic, inharmonic, 12-edo and other * each component is fed into a delay line with feedback * there is a group of frequency shifter and sample-and-hold effects before and after delay lines * each set of sinewave components can be filtered * all the parameters can be instantly automated with gesture recording !!! Please note that this effect consumes much CPU and requires a modern device. ====================== Quick Start: Top row of controls enables different parts of user interface: scenes editor ("scene"), controls switch ("edit") and "zoom" controls When "edit" is switch on, you can show or hide various controls (marked as "ctrl") and switch gesture recording automation for some of them (marked with ">") Main control surface displays sonogram with tracked elements. Colors are set accordingly to the group they are assigned (red-orange-green-blue are for harmonic, inharmonic, 12-edo and others). Each "lane" contains delay time controls. * Triangle facing left is for the start locator, it determines initial delay time * Square moves both start and end locators together * When left locator is first moved you can see the right locator with the same triangle. It shows the end of the selected region, the secondary delay time is determined by the difference between left and right locators * if you drag over the area of the region in a lane, the four-dotted/one circle indicator will change its appearance; this changes the arpeggio mode of the region. If set to leftmost position (one circle) the components go in-sync; if set to maximum value (shown as diagonal line with circles) - components are played sequentially * all settings can be stored as "scene" and multiple scenes can be switched sequentially; there is a set of button to move, add and delete scenes. All scenes will be stored as machine state; it can be exported / imported as a single file or as separate file with current scene in the "setup" view The standalone version always starts with output level set to -70 dB to avoid feedback

Screenshots

Harmony Eight3 screens
spectwhirl4 screens

Verdict

The call

The clearest difference is review sentiment: Harmony Eight at 75% against spectwhirl's 33%. Harmony Eight also leads on update cadence (weekly vs every 5 weeks) and rating (4.3 vs 4.0). On ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Harmony Eight costs $2.99 and spectwhirl $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Harmony Eight holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews point the same way: 75% of Harmony Eight's written reviews are positive against 33% of spectwhirl's.

UpkeepUpdate frequency

Harmony Eight ships an update weekly, spectwhirl every 5 weeks. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
Harmony Eight versus spectwhirl: the parameters behind the verdict, then further details
ParameterHarmony Eightspectwhirl
Price$2.99 — better$4.99
Rating4.3 (11 ratings) — better4.0 (5 ratings)
Positive reviews75.0% of reviews — better33.3% of reviews
Number of ratings11 — better5
Update frequencyWeekly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better12.0
Further details — not scored
Size17 MB7 MB
Age rating4+4+
DeveloperHarry GohsAlexey Nadzharov

Customer experience

Harmony Eight

All ratings11 ratings
Positive72.7%
Neutral27.3%
Negative0.0%
Written reviews16 reviews
Positive75.0%
Neutral12.5%
Negative12.5%

spectwhirl

All ratings5 ratings
Positive60.0%
Neutral20.0%
Negative20.0%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

In-app purchases

None

Harmony Eight

No in-app purchases

None

spectwhirl

No in-app purchases

Questions

Is Harmony Eight free?
Harmony Eight costs $2.99, with no in-app purchases.
Is spectwhirl free?
spectwhirl costs $4.99, with no in-app purchases.
Which has better reviews, Harmony Eight or spectwhirl?
Harmony Eight is rated higher. Harmony Eight averages 4.3 out of 5 from 11 ratings, while spectwhirl averages 4.0 from 5 ratings.
Do Harmony Eight or spectwhirl have ads?
Neither Harmony Eight nor spectwhirl shows ads.
Which is updated more often, Harmony Eight or spectwhirl?
Harmony Eight ships an update weekly, and spectwhirl every 5 weeks. Most recently, Harmony Eight was updated on October 24, 2026 and spectwhirl on October 24, 2026.

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