Attack Drums vs QuadroSphere
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- 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
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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
Verdict
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
Attack Drums costs $14.99 and QuadroSphere $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | Attack Drums | QuadroSphere |
|---|---|---|
| Price | $14.99 | $14.99 |
| Rating | 4.4 (23 ratings) | 5.0 (10 ratings) — better |
| Positive reviews | 34.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 23 — better | 10 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 97 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Waldorf Music | 4Pockets.com |
Customer experience
Attack Drums
QuadroSphere
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
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- 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 moreShow fewer
- 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
Attack Drums
No in-app purchases
QuadroSphere
No in-app purchases
Questions
Is Attack Drums free?
Is QuadroSphere free?
Which has better reviews, Attack Drums or QuadroSphere?
Do Attack Drums or QuadroSphere have ads?
Which is updated more often, Attack Drums or QuadroSphere?
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