# Model610 vs NullPerator

The clearest difference is price: NullPerator at Free against Model610's $19.99. NullPerator also leads on update cadence (daily vs every 21 months). Model610's advantage is iOS requirement (9.3 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

NullPerator is free to download; Model610 costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Model610 ships an update every 21 months, NullPerator daily. The most recent releases landed on September 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Model610 | NullPerator |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[4.7 (12 ratings)](https://appshunter.io/ios/app/model610-synth-controller/id979456894/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Daily** |
| Monetization | Paid | — |
| Size | 1 MB | 3 MB |
| Requires iOS | **9.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bill Mitsakos](https://appshunter.io/developer/979456893) | [203 Systems](https://appshunter.io/developer/6810035880) |

## What reviewers say

### Model610

[App page](https://appshunter.io/ios/app/model610-synth-controller/id979456894)

Control your Sequential Circuits Six-Trak synthesizer with an intuitive interface. Explore new sound possibilities with dedicated modes and manage your patches with cloud backup. Requires a Six-Trak synthesizer and an iOS-compatible MIDI interface.

**Highlights:** Hands-on synthesis parameter control, MONO and STACK modes, Built-in patch librarian, Automatic cloud patch backup, Easy configuration

**Features:** macOS Compatibility

**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 Model610 free?

Model610 costs $19.99, with no in-app purchases.

### Is NullPerator free?

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

### Do Model610 or NullPerator have ads?

Neither Model610 nor NullPerator shows ads.

### Which is updated more often, Model610 or NullPerator?

Model610 ships an update every 21 months, and NullPerator daily. Most recently, Model610 was updated on September 17, 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.*