Comparison

Billie Tracker vs Pixelsynth

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

Head to head
About

Billie Tracker

Create music with a powerful groovebox featuring a step sequencer, synthesizers, and a sampler. Arrange patterns into songs, shape unique sounds, and export your finished tracks. Designed for intuitive music production on mobile devices.

Highlights
  • Step sequencer for notes and instruments
  • Shapeable synth instruments
  • In-app sampler for recording sounds
  • Mixer with per-track controls
  • Song arrangement and export options
  • Hardware controller support
Features
Read full description

Billie Tracker is a groovebox: a step sequencer, synth instruments, a sampler and a mixer, built as one instrument for your phone or tablet. You write music in a grid. Notes go into patterns, patterns chain into sections, and sections line up into a song, so a full track grows out of small pieces you can reuse and rearrange. Trackers have worked this way for decades. If you have used one, this will feel like home. If you haven't, a built-in tutorial walks you through your first pattern, and every screen has help one key away. It is not tied to one sound. Shape the synths from clean tones to heavy drive, sample anything and play it back as an instrument, and make whatever you want to make: techno, ambient, hip hop, pop, or the 8-bit styles trackers are known for. Rows hold up to four notes, not just one. Every instrument is polyphonic, so a chord goes into the grid the same way a single note does. Hold one on a MIDI keyboard and it lands across the row's note lanes, quantized and in key. What you get: - A step sequencer for notes, instruments, volume and effects, with chains and a song view for arrangement - Up to four note lanes on every row, so chords are typed in like single notes, on any instrument - Synth instruments you can shape: timbre, color, filter, drive, envelopes and LFOs - A sampler that records straight into the app, so your own sounds sit next to the synths - A mixer with per-track levels and sends - BOUNCE and STEMS, so a finished song leaves the app as audio - Bundles: a song and every sample it uses travel as one file - A control surface built for tracker speed. Hold one key, press another, fast. Rearrange the layout to fit your hands, or plug in a hardware keyboard or game controller - Themes, KEY and SCALE settings, and a HELP key that explains whatever you are looking at Your songs are ordinary files. There is no account and nothing to sign into. Send a song to a friend, email one to yourself, or move it around in your file manager. Nothing is uploaded to us and nothing is locked to us. Billie Tracker is made by Billie Workers' Co-op. The people using it steer what gets built, and the Discord is the fastest way to reach us.

About

Pixelsynth

This app transforms musical input into a vibrant visual experience, allowing users to see and shape their sound in real-time. It offers a playful and immediate way to create music, with all controls and feedback displayed on a single screen. Designed by a Deaf musician, it prioritizes visual feedback as an integral part of the instrument.

Highlights
  • Real-time visual sound shaping
  • Interactive 16-pad grid
  • Adjustable waveforms, filters, and envelopes
  • LFO, delay, and reverb effects
  • AUv3 instrument compatibility
  • Offline functionality
Features
Read full description

Make a sound in seconds—and shape it while it plays. Pixelsynth turns taps, drags, melodies, and chords into a colorful instrument you can understand by watching it. Everything you play lives on one screen. Touch a note and start exploring. FROM THE DEVELOPER OF PIXELBOOP Pixelsynth is a new visual instrument from the maker of Pixelboop. Both apps share a love of playful grids, immediate feedback, and musical ideas that begin with one touch. PLAY FIRST. LEARN BY WATCHING. Sixteen pads invite you to find a melody, hold a chord, or strum across the screen. Notes light up as you play, and every sound control moves in front of you. You can see what each gesture is doing while you hear the result. SHAPE THE SOUND LIVE • Switch waveforms to change the character of your sound. • Sweep the filter from bright and open to soft and focused. • Shape attack, decay, sustain, and release for crisp plucks, swelling notes, and long tails. • Add motion with LFO, repeating echoes with delay, and depth with reverb. Each control is a colorful tank. Touch higher or lower inside it to set the value directly. Values in the upper half stay where you leave them; notes in the lower half drain away after you lift. It feels immediate because the picture and the sound follow the same gesture. MADE TO BE SEEN Created by a Deaf musician, Pixelsynth treats visual feedback as part of the instrument. The entire musical surface is drawn on a 40 by 24 pixel grid—just 960 pixels—so every control stays visible and every change has a visual response. PLAY IT YOUR WAY Open Pixelsynth as a standalone instrument on iPhone or iPad, or load the included AUv3 instrument in a compatible iOS music host. Your host can send MIDI notes and save the instrument state with your project. A compatible host is available separately. FREE TO EXPLORE No account. No in-app purchases. No third-party ads. The instrument works offline. The standalone app may occasionally show developer news or an introduction to Pixelboop, which you can close immediately. Pixelsynth does not track you or collect the music you play. Open it. Touch a note. See where it takes you.

Screenshots

Billie Tracker4 screens
Pixelsynth4 screens

Verdict

The call

The clearest difference is update cadence: Billie Tracker at every 2 days against Pixelsynth's every 9 days. On price, rating, ratings volume 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

Both are free to download. 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 — 5.0 for Billie Tracker against 5.0 for Pixelsynth. Both are backed by a comparable volume of ratings — 5 and 3 respectively.

UpkeepUpdate frequency

Billie Tracker ships an update every 2 days, Pixelsynth every 9 days. The most recent releases landed on October 1, 2026 and October 11, 2026 respectively.

Scorecard1 real difference · 9 level
Billie Tracker versus Pixelsynth: the parameters behind the verdict, then further details
ParameterBillie TrackerPixelsynth
PriceFreeFree
Rating5.0 (5 ratings)5.0 (3 ratings)
Positive reviews100.0% of reviews—
Number of ratings5 — better3
Update frequencyEvery 2 days — betterEvery 9 days
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.0
Further details — not scored
Size56 MB8 MB
Age rating4+4+
DeveloperBillie Cooperativede Bastion, Inc

Customer experience

Billie Tracker

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Pixelsynth

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Billie Tracker

No in-app purchases

None

Pixelsynth

No in-app purchases

Questions

Is Billie Tracker free?
Billie Tracker is free to download, with no in-app purchases.
Is Pixelsynth free?
Pixelsynth is free to download, with no in-app purchases.
Which has better reviews, Billie Tracker or Pixelsynth?
Billie Tracker and Pixelsynth are both rated 5.0 out of 5 on the App Store, from 5 and 3 ratings respectively.
Do Billie Tracker or Pixelsynth have ads?
Neither Billie Tracker nor Pixelsynth shows ads.
Which is updated more often, Billie Tracker or Pixelsynth?
Billie Tracker ships an update every 2 days, and Pixelsynth every 9 days. Most recently, Billie Tracker was updated on October 1, 2026 and Pixelsynth on October 11, 2026.

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