# JamFactory vs jAmp Doubler

JamFactory and jAmp Doubler both sit at 5.0 stars, but that hides the real split: 100% of jAmp Doubler's written reviews are positive against 0% of JamFactory's. jAmp Doubler also leads on in-app purchases (none vs 3) and update cadence (every 9 days vs every 2 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. JamFactory sells 3 in-app purchases, starting at $2.99 per month. jAmp Doubler asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for JamFactory against 5.0 for jAmp Doubler. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews are what separate them: 0% of JamFactory's written reviews are positive against 100% of jAmp Doubler's.

JamFactory ships an update every 2 months, jAmp Doubler every 9 days. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | JamFactory | jAmp Doubler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/jamfactory-multitrack-tunes/id1438346861/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/jamp-doubler/id6475082851/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Subscription | **Free** |
| Size | 73 MB | 6 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 12+ | 4+ |
| Developer | [JamFactory](https://appshunter.io/developer/1203814229) | [Jan Maes](https://appshunter.io/developer/1550506252) |

## What reviewers say

### JamFactory

[App page](https://appshunter.io/ios/app/jamfactory-multitrack-tunes/id1438346861)

Practice and perform your favorite songs with a full band experience. This app offers multitrack backing songs with lyrics, chords, and tabs, allowing you to customize sound settings for each track. Record your own music, remix existing songs, and even create music videos.

**Highlights:** Multitrack backing songs with lyrics, chords, and tabs, Customizable instrument sounds and effects per song, Tempo and key transposition, Song recording and remixing, Karaoke-style lyrics display, Music video creation and export

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JamFactory Basis | $2.99 | per month |
| JamFactory Standard | $4.99 | per month |
| JamFactory Premium | $9.49 | per month |


### 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 JamFactory free?

JamFactory 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, JamFactory or jAmp Doubler?

JamFactory and jAmp Doubler are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do JamFactory or jAmp Doubler have ads?

Neither JamFactory nor jAmp Doubler shows ads.

### Which is updated more often, JamFactory or jAmp Doubler?

JamFactory ships an update every 2 months, and jAmp Doubler every 9 days. Most recently, JamFactory was updated on November 2, 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.*