Comparison

Attack Drums vs QuadroSphere

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

Head to head
About

Attack Drums

This app is a powerful sound engine and pattern sequencer inspired by a classic VST plugin. It excels at creating drum sounds but can also be used for vocals and other instruments, featuring a unique text-based vocoder.

Highlights
  • 24-part sound engine
  • Pattern sequencer
  • Phrase Vocoder (text-based)
  • Versatile effects section
  • Inter-App Audio & Audiobus 3 support
  • MIDI Sync
  • Export song to audio file
Read full description

Attack Drums is a synthesizer designed mainly for drum sounds, but the powerful sound engine can also be used for everything else - including vocals. Based on the Waldorf Attack VST PlugIn from 2001, it consists of a 24-part sound engine, now packed with a pattern sequencer and a versatile effects section. One highlight of the effects section is the new Phrase Vocoder, a vocoder that uses written text instead of spoken words. Lyrics in - song out, adjust gender as you have always wanted! Just like Waldorf Nave, Attack Drums is a seriously in-depth musical instrument - easy and fun to use, but a sonic beast at its core! Specifications: -24 Sounds -Four independent effect slots with selectable effect: *Delay *Equalizer *Overdrive *Phaser *Flanger *Chorus *Phrase Vocoder -Reverb -Compressor -Pattern Sequencer -999 Patterns -Polyphonic steps - up to 8 notes per step -Fractional track/step timing -Audiobus 3 -Inter-App Audio -MIDI Settings -MIDI Sync -Loop function -Export song to audio file -AudioCopy / AudioPaste -Content control via iTunes File Sharing -Trigger Pads -Mixer -Recording

About

QuadroSphere

This audio plugin allows musicians to sculpt immersive soundscapes by controlling stereo placement and effects across four distinct frequency bands. Create dynamic, atmospheric audio with automated movement and morphing between saved settings.

Highlights
  • 4 configurable frequency bands
  • Control stereo separation, level, and pan per band
  • Create and morph between 12 snapshots
  • Modulation control for automated sweeps
  • Per-band effects (Haas, Delay, Reverb, Chorus, Compressor)
  • Convert mono to pseudo-stereo
  • MIDI CC control
Features
Read full description

QuadroSphere is a great tool for bringing an instrument to life by creating a soundscape with a constantly moving sound source. QuadroSphere splits the incoming audio signal into 4 distinct coloured frequency bands using the frequency bar. Each band has an associated coloured sphere allowing you to control the pan, stereo separation and volume level. You can use this plugin as a way to impose subtle control over stereo placement with little or no movement, or go crazy with random automation. Adding effects such as reverb or delay on a specific frequency band can help create a lush atmospheric swirling which surrounds the listener. This is great for musicians trying to create minimalistic ambient or tranquil soundscapes. You can create up to 12 snapshots of the sphere parameters and effect settings, then morph between them at a designated speed (measured in beats). You can also enable continuous randomization mode, and have full control over which spheres and control which parts are automated. You can also use QuadroSphere as a stereo splitter, using the additional outputs to add your own effects to band outputs. Key Features: ○ 4 Configurable frequency bands. ○ Control stereo separation, level and pan for each band. ○ Create up to 12 Snapshots. ○ Morph between various panning, width and frequency band levels. ○ Modulation control for automated sweeps around pan center. ○ Convert MONO signals into a pseudo-stereo image. ○ Per band Haas, Delay, Reverb, Chorus and Compressor. ○ Allows combined and individual per-band audio outputs. ○ Continuous randomized morphing of the stereo field. ○ Built in Preset Manager with drag and drop support. ○ Power and Solo for each band. ○ Controlable morph speeds. ○ Various animated transition modes. ○ Access most options using AU parameters or MIDI CC control.

Screenshots

QuadroSphere4 screens

Verdict

The call

The clearest difference is review sentiment: QuadroSphere at 100% against Attack Drums's 34%. QuadroSphere also leads on rating (5.0 vs 4.4) and device support (3 vs 1). On price, ratings volume, update cadence 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

Attack Drums costs $14.99 and QuadroSphere $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

QuadroSphere holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 23 and 10 respectively. Written reviews point the same way: 34% of Attack Drums's written reviews are positive against 100% of QuadroSphere's.

UpkeepUpdate frequency

Attack Drums ships an update every 2 weeks, QuadroSphere every 3 weeks. The most recent releases landed on September 12, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Attack Drums versus QuadroSphere: the parameters behind the verdict, then further details
ParameterAttack DrumsQuadroSphere
Price$14.99$14.99
Rating4.4 (23 ratings)5.0 (10 ratings) — better
Positive reviews34.2% of reviews100.0% of reviews — better
Number of ratings23 — better10
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.0 — better13.0
Further details — not scored
Size97 MB18 MB
Age rating4+4+
DeveloperWaldorf Music4Pockets.com

Customer experience

Attack Drums

All ratings23 ratings
Positive87.0%
Neutral4.3%
Negative8.7%
Written reviews73 reviews
Positive34.2%
Neutral13.7%
Negative52.1%

QuadroSphere

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Attack Drums

Reported bugs

21 issues
  • Crashes when loading own samples
  • Lag with MIDI clock sync
  • Inconsistent MIDI response and routing
  • Low velocity response
  • Transport controls not showing in DAWs
Show 16 more
  • App crashes on startup
  • App won't open on iOS 9
  • Display scaling issues on iPad mini
  • Sound designer page not working on iPad 2
  • Copy bug
  • Sequencer limited to one bar
  • Random velocity on pads
  • Crashes with Audiobus
  • Screen doesn't fit on iPad mini
  • Controls not working on iPad mini
  • Sound cut out
  • Locks up on iPad 2
  • Not compatible with iPad 2
  • Sluggish and slow performance
  • App closes for no reason
  • Display on iPad mini scaled incorrectly

Requested features

19 requests
  • Ableton Link support
  • Improved MIDI sync
  • Smoother IAA and MIDI integration
  • More pattern steps (64+)
  • Support for triplets and higher note divisions
Show 14 more
  • Dropbox integration
  • Disable opening animation
  • Separate outputs in iOS
  • Auto-envelope setting for samples
  • Parameter automation
  • MIDI CC parameter control
  • MIDI port/channel selection
  • Looping multiple patterns for jamming
  • Subfolders for samples
  • Interface facelift
  • Live tweaking of FX, rolls, stutters
  • Parameter locks
  • Triplet grids option
  • Ability to export MIDI patterns

QuadroSphere

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Attack Drums

No in-app purchases

None

QuadroSphere

No in-app purchases

Questions

Is Attack Drums free?
Attack Drums costs $14.99, with no in-app purchases.
Is QuadroSphere free?
QuadroSphere costs $14.99, with no in-app purchases.
Which has better reviews, Attack Drums or QuadroSphere?
QuadroSphere is rated higher. Attack Drums averages 4.4 out of 5 from 23 ratings, while QuadroSphere averages 5.0 from 10 ratings.
Do Attack Drums or QuadroSphere have ads?
Neither Attack Drums nor QuadroSphere shows ads.
Which is updated more often, Attack Drums or QuadroSphere?
Attack Drums ships an update every 2 weeks, and QuadroSphere every 3 weeks. Most recently, Attack Drums was updated on September 12, 2026 and QuadroSphere on October 1, 2026.

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