# WBTRK vs NullPerator

The clearest difference is price: NullPerator at Free against WBTRK's $8.99. NullPerator also leads on update cadence (daily vs every 6 days). WBTRK's advantage is chart position (#176 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

NullPerator is free to download; WBTRK costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

WBTRK ships an update every 6 days, NullPerator daily. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | WBTRK | NullPerator |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/wbtrk/id6779159104/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 days | **Daily** |
| Monetization | Paid | — |
| Best chart rank | **#176** | — |
| Size | 16 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LASZLO DOBROVOLSZKI](https://appshunter.io/developer/6779159106) | [203 Systems](https://appshunter.io/developer/6810035880) |

## What reviewers say

### WBTRK

[App page](https://appshunter.io/ios/app/wbtrk/id6779159104)

**Currently charting:** #176 Top Paid · Music (US App Store)

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.

**Highlights:** 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

**In-app purchases:** none


### NullPerator

[App page](https://appshunter.io/ios/app/nullperator/id6810035878)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WBTRK free?

WBTRK costs $8.99, with no in-app purchases.

### Is NullPerator free?

NullPerator is free to download, with no in-app purchases.

### Do WBTRK or NullPerator have ads?

Neither WBTRK nor NullPerator shows ads.

### Which is updated more often, WBTRK or NullPerator?

WBTRK ships an update every 6 days, and NullPerator daily. Most recently, WBTRK was updated on October 7, 2026 and NullPerator on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*