Comparison

DruML Companion vs HeadStack

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

Head to head
About

DruML Companion

Features
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DruML Companion is the mobile app for configuring DruML electronic drum modules. Connect to your device over USB MIDI and fine-tune every aspect of your sound. - Adjust volume curves with a visual bezier editor - Configure MIDI note mapping, channels, and CC messages - Calibrate piezo sensors and touch sensitivity - Set triggering thresholds and confidence levels - Update device firmware over USB - Real-time velocity and position monitoring - Works with all DruML hardware revisions Pair with DruML Studio (druml.ai) for a full browser-based experience with AI-powered training and advanced diagnostics.

About

HeadStack

This app offers a virtual tape loop with 8 independently configurable playback heads for creating diverse echo effects. It captures the warmth of classic tape machines while offering modern flexibility for sound design, from vintage echoes to evolving ambient textures.

Highlights
  • Multi-head tape engine with 8 playback heads
  • Vintage tape character and imperfections
  • Independent control for each playback head
  • Rotating head wheel for dynamic effects
  • Granular harmony engine for pitch-shifted textures
  • Per-head modulation and creative feedback routing
  • Diffusion and smearing for atmospheric washes
Features
Currently charting
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HeadStack is a multi-head tape delay inspired by the character, movement and musicality of classic magnetic echo machines, reimagined for modern production. At its heart is a virtual tape loop with 8 independently configurable playback heads. Each head can be positioned, levelled and panned to create everything from vintage slap-back echoes and rhythmic repeats to vast stereo soundscapes and evolving ambient textures. While HeadStack captures the warmth and unpredictability of classic tape systems, it is not limited by their mechanical constraints. Individual heads can be modulated, filtered, diffused, pitch-shifted and transformed into granular playback engines, opening up a palette that ranges from authentic analogue echoes to shimmering harmonies and cinematic atmospheres. The tape itself becomes an instrument. Rotate the head wheel to continuously reposition playback points, stretch the spacing between heads, introduce head loss, or create cascading feedback networks that evolve with every repeat. Independent filtering, stereo placement and modulation allow each head to develop its own character within the delay line. You can even play sequences Into HeadStack and freeze it using your hold pedal and continue to play over the top. Whether you’re searching for vintage tape ambience, rhythmic multi-tap delays, lush granular harmonies or experimental feedback textures, HeadStack combines the soul of a classic tape echo with the flexibility of a modern creative effects processor. Welcome to a new generation of tape delay. HeadStack Features: Multi-Head Tape Engine - Create complex rhythmic delays using multiple independently controllable playback heads running on a shared virtual tape loop. Vintage Character - Capture the warmth, movement and musical imperfections of classic tape echo machines with adjustable tape loss, filtering and feedback behavior. Independent Head Control - Each playback head features its own level, pan, timing offset and tonal shaping, allowing intricate delay patterns and evolving stereo textures. Rotating Head Wheel- Continuously reposition or stretch the virtual head arrangement to create shifting rhythms, moving echoes and dynamic performance effects. Granular Harmony Engine - Transform individual heads into pitch-shifted granular voices, generating harmonies, octave layers and shimmering textures directly from the tape loop. Per-Head Modulation - Add movement and expression with independent modulation of playback position, spacing, tremolo and stereo placement. Creative Feedback Routing - Choose between traditional multi-head feedback or route feedback from a specific playback head for unique echo patterns and evolving repeats. Diffusion & Smearing - Blend between precise rhythmic echoes and spacious, atmospheric washes using integrated diffusion processing. Deep Stereo Imaging - Create anything from focused mono echoes to wide immersive soundscapes with per-head panning, Haas delay and stereo enhancement controls. Performance Ready - Designed for real-time interaction, encouraging hands-on manipulation of head positions, modulation and feedback while performing. Precision & Experimentation - Dial in authentic tape echoes, lush ambient delays or push the engine into unpredictable granular and feedback-driven territories. Modern Workflow - Combines the immediacy of classic hardware with the flexibility, recall and precision expected from a contemporary audio plugin. Interactive Head Wheel - Grab and rotate the virtual head wheel to reposition playback heads, create evolving delay patterns and perform dramatic tape-style scrubbing effects. Dynamic Tape Warping- Enable Rotate and Stretch modes to continuously morph the spacing and timing between playback heads, transforming static echoes into living, breathing rhythmic textures. Freeze Buffer - Freeze the contents of the audio buffer using a foot pedal, capture ideas and play over the top.

Screenshots

DruML Companion4 screens
HeadStack4 screens

Verdict

The call

The clearest difference is price: DruML Companion at Free against HeadStack's $12.99. HeadStack's advantage is update cadence (every 9 days vs every 2 months) and chart position (#184 vs unranked). On ads, in-app purchases, device support and iOS requirement 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

DruML Companion is free to download; HeadStack costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DruML Companion ships an update every 2 months, HeadStack every 9 days. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 8 level
DruML Companion versus HeadStack: the parameters behind the verdict, then further details
ParameterDruML CompanionHeadStack
PriceFree — better$12.99
Rating—4.8 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#184 — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.014 — better
Further details — not scored
Size21 MB25 MB
Age rating4+4+
DeveloperMichael Campbell4Pockets.com

In-app purchases

None

DruML Companion

No in-app purchases

None

HeadStack

No in-app purchases

Questions

Is DruML Companion free?
DruML Companion is free to download, with no in-app purchases.
Is HeadStack free?
HeadStack costs $12.99, with no in-app purchases.
Do DruML Companion or HeadStack have ads?
Neither DruML Companion nor HeadStack shows ads.
Which is updated more often, DruML Companion or HeadStack?
DruML Companion ships an update every 2 months, and HeadStack every 9 days. Most recently, DruML Companion was updated on October 1, 2026 and HeadStack on October 3, 2026.

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