Uber Synth vs WBTRK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Uber Synth
This app offers a polyphonic multi-timbral FM synthesizer for iOS devices. It features a triple-oscillator sound engine with five distinct multi-timbral options for creating evolving and complex soundscapes. Supports Audiobus for integration with other music apps.
- Polyphonic multi-timbral FM synthesizer
- Triple-oscillator cross-modulated FM engine
- Five multi-timbral options
- Sound map and sound palettes
- Evolving sound generation
- Audiobus support
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Uber Synth is a polyphonic multi-timbral frequency modulated (FM) synthesizer that runs on any iOS device. The underlying sound engine is based on the triple-oscillator cross-modulated FM synthesizer first introduced in our xMod app. Uber Synth provides five multi-timbral options: 1) Mix the sounds of any two sound patches, 2) combine patches using the sound map, 3) Generate specified as well as randomized sound palettes across the keyboard, 4) Specify a region in sound space centered on a sound and move a point by a variable randomized amount within the region each time you play a note to create an evolving mix of the center sound and the sound nearest the point. 5) Do the same as above moving the point automatically at a specified rate. Supports Audiobus.
WBTRK
Create music on the go with a comprehensive mobile studio. Features a tracker grid, multiple sound engines, a sampler, and a mixer. Offers live performance mode and extensive effects for detailed sound shaping.
- Tracker grid for note input
- 21 sound engines and 450+ sounds
- Sampler with recording and editing
- Twelve-channel mixer
- Live performance mode
- AUv3 plug-in hosting
- MIDI and Ableton Link support
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WBTRK is a complete music studio in your pocket: a fast tracker grid, 21 sound engines, a library of over 450 ready-made sounds, drum kits, a sampler, per-note effects, a twelve-channel mixer, a live performance mode, plug-in hosting and MIDI. One purchase for iPhone, iPad and Mac. WRITE • PHRASES of 16 steps hold notes, chords, instrument, velocity and effects; they stack into CHAINS, and chains arrange into a twelve-channel SONG • Hold a cell and slide to set a note or a value — it plays as you go • Select, copy and paste cell by cell, transpose whole sections, and end a note exactly where you want with OFF • Every channel loops on its own and can run at its own tempo, locked to one clock • A hardware keyboard on iPad and Mac, a MIDI keyboard, or any Bluetooth game controller drives the whole tracker SOUND • Over 450 ready-made sounds sorted by what they are — drums, bass, keys, bells, plucked, strings, winds, voice, leads, pads, fx — each one a tap away from playing, all balanced to the same loudness. Save your own for any engine • DRUM KIT: ten drum slots in one instrument — eight built-in kits, or build your own from any sound or sample • Classic synths: pulse, saw, triangle, FM, noise, supersaw pad, sub, pluck, wavetable and the dual-oscillator MODX, plus DRUM, an analog drum voice • WOVEN, a macro-oscillator with 24 models and 96 classic DX7 patches; ROUND, a resonator for strings, bars and bells; MODAL for struck percussion • SAMPLER: record or import, chop at transients, stretch to the tempo, loop, reverse, round-robin • SPEECH sings your lyrics in English and Japanese; GRAIN turns any recording into clouds; DRONE, RESONATOR and TEXTURE build ambient beds • AUv3 hosting: play your instrument plug-ins and insert effect plug-ins on any channel SHAPE • 32 effects on any note: delays, reverbs up to thirty seconds, tempo-synced gate and autopan, retrigger, chorus, flanger, ring mod, wavefold, bitcrush, slides, vibrato, arps, FOGGY granular clouds and more • AUT automation morphs an instrument and its effect across the rows • RANDOM dice, tables for instant arpeggios, a groove editor per instrument, scale lock • A twelve-channel mixer with volume, pan, mute, solo and plug-in inserts PERFORM • LIVE MODE: launch phrases from six scenes on pads, quantized to the beat or the bar, and punch in delay and filters — or latch them CONNECT • MIDI in with step and live recording, MIDI out to hardware, MIDI clock and Ableton Link KEEP • Render to WAV (16 or 24 bit), stems and MIDI; share songs as files; your session autosaves • A lock-screen player with cover art in your theme • 28 themes — the studio look comes in dark and light and can follow your device — a theme editor, seven typefaces, hex numbers if you like • English and Japanese, and a demo song to start from Everything runs on your device. No account, no ads, no subscription, nothing collected.
Screenshots
Verdict
The clearest difference is review sentiment: WBTRK at 100% against Uber Synth's 50%. WBTRK also leads on rating (5.0 vs 2.0) and update cadence (every 6 days vs every 3 months). Uber Synth's advantage is iOS requirement (14.0 vs 18.0). On ads, in-app purchases, monetization model and device support 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
Uber Synth costs $3.99 and WBTRK $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WBTRK holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: WBTRK has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Uber Synth's written reviews are positive against 100% of WBTRK's.
Uber Synth ships an update every 3 months, WBTRK every 6 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | Uber Synth | WBTRK |
|---|---|---|
| Price | $3.99 | $2.99 — better |
| Rating | 2.0 (1 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 6 — better |
| Update frequency | Every 3 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 7 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Mark Carlotto | LASZLO DOBROVOLSZKI |
Customer experience
Uber Synth
WBTRK
In-app purchases
Uber Synth
No in-app purchases
WBTRK
No in-app purchases









