# SOLO [Nr.19] vs DubFilter

The clearest difference is monetization model: SOLO [Nr.19] at free against DubFilter's free with in-app purchases. DubFilter's advantage is rating (4.7 vs 4.4) and ratings volume (71 vs 7). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. SOLO [Nr.19] sells 1 one-off in-app purchase and DubFilter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

DubFilter holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: DubFilter has 71 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 67% of SOLO [Nr.19]'s written reviews are positive against 73% of DubFilter's.

SOLO [Nr.19] ships an update every 4 months, DubFilter every 6 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SOLO [Nr.19] | DubFilter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/solo-nr19/id884781236/reviews) | **[4.7 (71 ratings)](https://appshunter.io/ios/app/dubfilter/id979648058/reviews)** |
| Number of ratings | 7 | **71** |
| Positive reviews | 66.7% of reviews | **73.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 60 MB | 12 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [apeSoft](https://appshunter.io/developer/464660782) | [Amazing Noises](https://appshunter.io/developer/903336421) |

## What reviewers say

### SOLO [Nr.19]

[App page](https://appshunter.io/ios/app/solo-nr19/id884781236)

This application is designed for musicians to study and perform a specific algorithmic composition. It digitally implements the original analog setup for a complex musical piece, allowing soloists to create polyphonic music through feedback systems. It provides two distinct performance versions for study.

**Highlights:** Digital implementation of analog setup, Algorithmic composition performance, Feedback system for polyphonic music, Study and live performance tool, Two performance versions included

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SOLO  Nr.19  Live Performance | Free | one-time |


### DubFilter

[App page](https://appshunter.io/ios/app/dubfilter/id979648058)

This app provides a powerful dual filter with resonance and an exclusive overlap parameter. It also features a redesigned stereo sample player with LFO and scrubbing, along with extensive MIDI and file management capabilities.

**Highlights:** Dual low-pass/high-pass filter, Resonance and Overlap parameter, Stereo sample player with LFO, Scrubbing capabilities, Audiobus and Inter-App Audio support, MIDI control and file management, Preset morphing pad

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audio Unit Plugin Support | $1.99 | one-time |


## Frequently asked questions

### Is SOLO [Nr.19] free?

SOLO [Nr.19] is free to download, with in-app purchases available.

### Is DubFilter free?

DubFilter is free to download, with in-app purchases available.

### Which has better reviews, SOLO [Nr.19] or DubFilter?

DubFilter is rated higher. SOLO [Nr.19] averages 4.4 out of 5 from 7 ratings, while DubFilter averages 4.7 from 71 ratings.

### Do SOLO [Nr.19] or DubFilter have ads?

Neither SOLO [Nr.19] nor DubFilter shows ads.

### Which is updated more often, SOLO [Nr.19] or DubFilter?

SOLO [Nr.19] ships an update every 4 months, and DubFilter every 6 months. Most recently, SOLO [Nr.19] was updated on October 21, 2026 and DubFilter on October 24, 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.*