Comparison

Qithesizer vs spectwhirl

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

Head to head
About

Qithesizer

This advanced music synthesizer combines virtual analog, wavetable, and physical modeling sound engines. It offers extensive modulation capabilities, a built-in sequencer, and on-screen keyboard for creating complex sounds.

Highlights
  • Multiple sound engines (virtual analog, wavetable, physical modeling)
  • Extensive modulation sources and destinations
  • Full MIDI mapping
  • 16-step sequencer with pattern editor
  • Waveform and dynamic visualizations
  • On-screen keyboard
Features
Read full description

Meet Qithesizer, a powerful multi-engine hybrid software synthesizer. Designed with wind controller in mind, it combines virtual analog, wavetable, and physical modeling in one. 【Features】 ∙ Multiple sound engines: basic waveforms, hundreds of digital waveforms, multiple physical models ∙ 11 modulation sources, 27 modulation destinations ∙ Full midi mapping ∙ 16-step sequencer with powerful pattern editor, save patterns by preset ∙ Waveform and dynamic visualizations ∙ Full-size, on-screen keyboard Our site: www.robkoo.com Facebook Page: @RobkooMusic Twitter: @Robkoo_Music Feedback: cuimingwei@robkoo.com

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

Qithesizer4 screens
spectwhirl4 screens

Verdict

The call

Qithesizer and spectwhirl both sit at 4.1 stars, but that hides the real split: 77% of Qithesizer's written reviews are positive against 33% of spectwhirl's. Qithesizer also leads on update cadence (fortnightly vs every 5 weeks). spectwhirl's advantage is price ($4.99 vs $12.99) and iOS requirement (12.0 vs 15.0). On rating, ratings volume, ads and in-app purchases 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

Qithesizer costs $12.99 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

On the App Store both sit at effectively the same score — 4.1 for Qithesizer against 4.0 for spectwhirl. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews are what separate them: 77% of Qithesizer's written reviews are positive against 33% of spectwhirl's.

UpkeepUpdate frequency

Qithesizer ships an update fortnightly, spectwhirl every 5 weeks. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
Qithesizer versus spectwhirl: the parameters behind the verdict, then further details
ParameterQithesizerspectwhirl
Price$12.99$4.99 — better
Rating4.1 (11 ratings) — better4.0 (5 ratings)
Positive reviews76.9% of reviews — better33.3% of reviews
Number of ratings11 — better5
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size29 MB7 MB
Age rating4+4+
DeveloperRobkoo Information & Technologies Co., Ltd.Alexey Nadzharov

Customer experience

Qithesizer

All ratings11 ratings
Positive72.7%
Neutral9.1%
Negative18.2%
Written reviews13 reviews
Positive76.9%
Neutral0.0%
Negative23.1%

spectwhirl

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

In-app purchases

None

Qithesizer

No in-app purchases

None

spectwhirl

No in-app purchases

Questions

Is Qithesizer free?
Qithesizer costs $12.99, with no in-app purchases.
Is spectwhirl free?
spectwhirl costs $4.99, with no in-app purchases.
Which has better reviews, Qithesizer or spectwhirl?
Qithesizer is rated higher. Qithesizer averages 4.1 out of 5 from 11 ratings, while spectwhirl averages 4.0 from 5 ratings.
Do Qithesizer or spectwhirl have ads?
Neither Qithesizer nor spectwhirl shows ads.
Which is updated more often, Qithesizer or spectwhirl?
Qithesizer ships an update fortnightly, and spectwhirl every 5 weeks. Most recently, Qithesizer was updated on October 24, 2026 and spectwhirl on October 24, 2026.

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