WBTRK vs VU950 FX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WBTRK
Create music with a sample-accurate audio engine and a unique speech synthesizer. Build songs from patterns, arrange them into chains, and utilize a variety of sound engines and effects. Offers MIDI support and export options.
- Sample-accurate audio engine
- Speech synthesizer (TALK and SING modes)
- 15 diverse sound engines
- 28 per-note effects
- MIDI in/out and clock support
- AUv3 hosting
- Song rendering to WAV
Read full descriptionHide full description
WBTRK is a complete music studio that fits in your pocket — 18 instruments, a sampler, per-note effects, a full mixer, plug-in hosting and MIDI, wrapped in a fast grid workflow that lets you write whole tracks with your thumbs. WRITE • Compose in a grid: 16-step PHRASES stack into CHAINS, chains arrange into a six-channel SONG — the fastest way to sketch on a phone, deep enough to finish • The radial wheel: long-press any cell and rotate to dial in notes, chords, instruments or effects — it previews as you turn • A chord picker with real harmony — maj7, min7, sus, dim — plus select, copy, paste and transpose for whole sections • Loop channels independently, re-root phrases per bar, and let every channel run at its own tempo while staying locked to one clock SOUND — 18 instruments • Classic synths: pulse, saw, triangle, FM, noise, supersaw pad, sub, pluck, wavetable (draw your own cycle), and MODX — a dual-oscillator synth with a 4-LFO modulation matrix • SAMPLER: record from the mic or import audio; trim, normalize, loop, ping-pong, reverse — or beat-chop at transients and play the slices across the keyboard • A singing robot voice with real lyrics, granular clouds over any recording, and struck modal percussion — marimba, bells, steel pan • An ambient section: DRONE, RESONATOR and TEXTURE — beds, drones and weather • AUv3 HOSTING: play your installed instrument plug-ins from the sequencer, and insert effect plug-ins on any channel SHAPE • 29 effects on any note: delay, two reverbs (one runs to thirty seconds), tempo-synced trance gate and autopan, retrigger, chorus, flanger, ring mod, wavefold, bitcrush, slides, vibrato, arps and more • True stereo instruments — place every oscillator in the field • A full mixer: per-channel volume, pan, mute, solo and plug-in inserts • RANDOM dice that re-roll a note on every hit, tables for instant arpeggios, per-instrument swing and scale lock CONNECT • MIDI in (play and record, step or live), MIDI out and MIDI clock for hardware • Ableton Link keeps you in time with other apps and gear KEEP • Render your track to WAV, share songs as files, your session autosaves • A lock-screen player with cover art drawn in your theme • 27 themes plus a full theme editor — from the clean studio default to full retro, hex numbers included • A built-in demo song that shows the whole studio off Everything runs on your device. No account, no ads, no subscription, nothing collected.
VU950 FX
This audio effect plugin emulates classic sampler tones with 12-bit DSP. It offers sample-rate reduction, input drive, and an adjustable anti-aliasing filter to shape your sound. Perfect for adding gritty character to your music productions.
- 12-bit DSP model
- Sample-rate reduction
- Input drive
- Adjustable anti-aliasing filter
- Bass and presence coloration
- Noise generation
Read full descriptionHide full description
VU950 FX is an AUv3 effect plug-in built around a gritty 12-bit DSP model, designed to bring classic sampler-style tone shaping directly into your iOS music host. At its core, VU950 FX combines sample-rate reduction, 12-bit DAC character, input drive, bass and presence coloration, noise, and an anti-aliasing filter that naturally closes as the sample rate goes down. You can keep that authentic behavior, or edit the AA Filter manually to fine-tune how dark, crunchy, clean, or aliased the sound becomes. Use RATE to set the modeled sample rate, from cleaner high-bandwidth processing to darker low-rate texture. Use FILTER to shape the main tone filter from wide open to heavily rolled off. Use CHANNELS to choose whether the left or right input channel becomes the focused mono source. The jog wheel edits the active RATE or FILTER page. ON/+ and OFF/- switch the selected channel when CHANNELS mode is active. The top knobs give you direct control over AA Filter, Input Drive, and Output Gain, so you can push the DSP model harder, tame the final level, or dial in just the right amount of anti-aliasing response. VU950 FX is made for fast AUv3 workflows: load it in your favorite compatible host, automate the parameters, and turn clean audio into controlled 12-bit character in seconds.
Screenshots
Verdict
The clearest difference is price: VU950 FX at $0.99 against WBTRK's $8.99. VU950 FX also leads on iOS requirement (15.0 vs 18.0). WBTRK's advantage is update cadence (every 6 days vs every 3 weeks) and ratings volume (6 vs 2). On rating, review sentiment, ads and in-app purchases 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
WBTRK costs $8.99 and VU950 FX $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for WBTRK against 5.0 for VU950 FX. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
WBTRK ships an update every 6 days, VU950 FX every 3 weeks. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.
| Parameter | WBTRK | VU950 FX |
|---|---|---|
| Price | $8.99 | $0.99 — better |
| Rating | 5.0 (6 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 6 — better | 2 |
| Update frequency | Every 6 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | LASZLO DOBROVOLSZKI | Dariusz Chynek |
Customer experience
WBTRK
VU950 FX
In-app purchases
WBTRK
No in-app purchases
VU950 FX
No in-app purchases








