# WOW Filterbox vs jAmp Doubler

The clearest difference is review sentiment: jAmp Doubler at 100% against WOW Filterbox's 64%. jAmp Doubler also leads on in-app purchases (none vs 1) and update cadence (every 9 days vs every 4 months). WOW Filterbox's advantage is ratings volume (30 vs 4). On price and ads there is nothing between them.

Both are free to download. WOW Filterbox sells 1 one-off in-app purchase. jAmp Doubler asks for nothing beyond the download.

jAmp Doubler holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: WOW Filterbox has 30 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 64% of WOW Filterbox's written reviews are positive against 100% of jAmp Doubler's.

WOW Filterbox ships an update every 4 months, jAmp Doubler every 9 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | WOW Filterbox | jAmp Doubler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (30 ratings)](https://appshunter.io/ios/app/wow-filterbox/id666864434/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/jamp-doubler/id6475082851/reviews)** |
| Number of ratings | **30** | 4 |
| Positive reviews | 64.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 86 MB | 6 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sugar Bytes GmbH](https://appshunter.io/developer/614418826) | [Jan Maes](https://appshunter.io/developer/1550506252) |

## What reviewers say

### WOW Filterbox

[App page](https://appshunter.io/ios/app/wow-filterbox/id666864434)

This app offers a creative multi-filterbox with 21 filter types, analog and digital distortions, and powerful modulation options. It includes an integrated player and recorder, XY-pads for parameter control, and supports MIDI and Ableton Link.

**Highlights:** 21 filter types, Analog and digital distortion, Step sequencer & wobble generator, LFO with multiple waveforms, XY-Pads for parameter control, Integrated player and recorder, MIDI support & Ableton Link

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WOW Full Version | $19.99 | one-time |


### jAmp Doubler

[App page](https://appshunter.io/ios/app/jamp-doubler/id6475082851)

This audio plugin creates a stereo effect by introducing a subtle delay to one audio channel. It offers precise control over the delay time and can be managed via MIDI. Ideal for enhancing mono audio sources with a wider soundstage.

**Highlights:** Stereo widening effect, Adjustable delay time (0-50 microseconds), MIDI control, AUv3 plugin format, Enhances mono audio

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is WOW Filterbox free?

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

### Is jAmp Doubler free?

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

### Which has better reviews, WOW Filterbox or jAmp Doubler?

jAmp Doubler is rated higher. WOW Filterbox averages 4.6 out of 5 from 30 ratings, while jAmp Doubler averages 5.0 from 4 ratings.

### Do WOW Filterbox or jAmp Doubler have ads?

Neither WOW Filterbox nor jAmp Doubler shows ads.

### Which is updated more often, WOW Filterbox or jAmp Doubler?

WOW Filterbox ships an update every 4 months, and jAmp Doubler every 9 days. Most recently, WOW Filterbox was updated on November 1, 2026 and jAmp Doubler on November 4, 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.*