# GSDSP Quantum Filter vs Note to Be

GSDSP Quantum Filter and Note to Be both sit at 5.0 stars, but that hides the real split: 100% of GSDSP Quantum Filter's written reviews are positive against 50% of Note to Be's. Note to Be's advantage is price ($4.99 vs $14.99) and update cadence (weekly vs every 5 weeks). On rating, ratings volume, ads and in-app purchases there is nothing between them.

GSDSP Quantum Filter costs $14.99 and Note to Be $4.99 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 GSDSP Quantum Filter against 4.9 for Note to Be. Both are backed by a comparable volume of ratings — 3 and 7 respectively. Written reviews are what separate them: 100% of GSDSP Quantum Filter's written reviews are positive against 50% of Note to Be's.

GSDSP Quantum Filter ships an update every 5 weeks, Note to Be weekly. The most recent releases landed on September 22, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | GSDSP Quantum Filter | Note to Be |
| --- | --- | --- |
| Price | $14.99 | **$4.99** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920/reviews)** | [4.9 (7 ratings)](https://appshunter.io/ios/app/note-to-be-midi-quantizer/id6596771972/reviews) |
| Number of ratings | 3 | **7** |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Paid | Paid |
| Size | 77 MB | 71 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Scholda](https://appshunter.io/developer/1642323227) | [Cem Olcay](https://appshunter.io/developer/523633853) |

## What reviewers say

### GSDSP Quantum Filter

[App page](https://appshunter.io/ios/app/gsdsp-quantum-filter/id6498711920)

This audio effect plugin offers analog-modeled filters with flexible routing and dynamic modulation for creative sound design. It provides extensive control over tone shaping and complex filtering with various filter types and configurations.

**Highlights:** Analog-modelled filters, 11 filter modes, Series and parallel routing, Dynamic modulation support, Stereo and dual mono modes, MIDI control integration

**Features:** Vision Pro support

**In-app purchases:** none


### Note to Be

[App page](https://appshunter.io/ios/app/note-to-be-midi-quantizer/id6596771972)

This app offers advanced MIDI quantization for iOS musicians. It allows precise control over note selection, octave flexibility, and MIDI CC integration for crafting harmonious compositions and dynamic live performances. Supports microtonal scales and multi-synth setups.

**Highlights:** Customizable note and octave selection, MIDI CC to note conversion, Multi-synth channel assignment, Live performance toggles, Microtonal scale support (Scala Library), MPE polyphonic playback

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GSDSP Quantum Filter free?

GSDSP Quantum Filter costs $14.99, with no in-app purchases.

### Is Note to Be free?

Note to Be costs $4.99, with no in-app purchases.

### Which has better reviews, GSDSP Quantum Filter or Note to Be?

GSDSP Quantum Filter is rated higher. GSDSP Quantum Filter averages 5.0 out of 5 from 3 ratings, while Note to Be averages 4.9 from 7 ratings.

### Do GSDSP Quantum Filter or Note to Be have ads?

Neither GSDSP Quantum Filter nor Note to Be shows ads.

### Which is updated more often, GSDSP Quantum Filter or Note to Be?

GSDSP Quantum Filter ships an update every 5 weeks, and Note to Be weekly. Most recently, GSDSP Quantum Filter was updated on September 22, 2026 and Note to Be on October 7, 2026.

---

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