Comparison

JamFactory vs jAmp Doubler

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

JamFactory

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
Read full description

Get on stage with JamFactory and sing and play your favorite tunes. JamFactory is all about practicing at home and sounding like a professional on stage. Included you will find all the songs and all the features you need to give a concert as a home entertainer or as a live musician. When you give a concert, you don’t have time to change the sound of your instrument between songs. Therefore, with JamFactory you can store all your favorite 3rd party guitar effects, microphone settings and keyboard sounds together with each song. When you finish playing a song, all your carefully prepared sounds and settings will be loaded with the next song so you are ready to play and enjoy performing your music. In JamFactory you will find many pre-recorded multitrack backing songs and you can even supplement the ever expanding catalogue with you own audio song. You can also remix the songs in you favorite 3rd party DAW (Digital Audio Workstation). The JamFactory hit songs include lyrics, chords and guitar tabs and if you transpose the key of the song the chords/tabs will transpose as well. JamFactory is not just a backing band. It’s an entire audio workstation filled with pre-recorded songs ready to accompany your musical performance. Key features: Main Page • Browse songs by category. • Search songs using smart search. • Guitar tuner • Download your favorite songs to "My Songs". • Build your playlists from the downloaded songs. • Create you own audio or midi songs. Mixer • Re-mix your songs to match your taste. • Solo or mute individual instruments. • Transpose the song to a different key. • Change the tempo of the song. • Fade in and fade out. • Navigate between the pre-defined song sequences. • Loop parts of the song for practicing. • Record your own custom tracks. • Export tracks to your DAW for professional remixing. • Import audio files from you DAW. • Skip count in. Lyrics, Chords and Tabs • Lyrics, chords and guitar tabs are displayed in karaoke style. • Direct access to the master fader. Line In • Use the microphone on your headset to get started. • Use a third party sound card for professional multichannel inputs from microphones, guitars, keyboards etc. • Open 3rd party synthesizer apps and play using a midi keyboard. • Open 3rd party effect apps for you guitar or microphone. • Store all your sounds and effects with each song for fast recall. • Record your microphone, keyboard og guitar output on user tracks. • Apply equalizer, reverb and dynamics to your input. Video • Record a music video and share it with your friends. • Export audio to a professional music video app for editing. Please notice: You can try out JamFactory for free for 3 days! If you like JamFactory and want to continue as a subscriber after your 3 days free trial you don't have to do anything. Your subscription will be renewed automatically unless you deactivate automatic renewal no later than 24 hours before your subscription periode expires. Your JamFactory-membership is a monthly subscription that begins when you sign up. You can terminate your subscription online anytime. You have no long term commitment and there is no termination fee. You can start using JamFactory as soon as you have signed up. If you subscribe via iTunes: Your payment will be drawn from your iTunes account when your purchase is confirmed. Your subscription will be renewed automatically unless you deactivate automatic renewal no later than 24 hours before your subscription expires. Your account will be charged for renewal within 24-hours prior to the end of the current period. Your price depends on what subscription you have chosen. The subscriptions can be administered by you and automatic renewal can be deactivated on your account settings on the unit. If you don't subscribe through iTunes you can manage your subscription through JamFactory. Privacy Policy: https://jamfactory.club/privacy-policy/ Terms of Service: https://jamfactory.club/terms-of-service/

About

jAmp Doubler

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
Read full description

Doubler is an AUv3 plugin that adds stereo effect by delaying the right channel wrt the left channel. The delay is controlled by the central knob and goes from 0 microseconds to 50 microseconds. It is possible to control this plugin via MIDI.

Screenshots

JamFactory4 screens
jAmp Doubler1 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
JamFactory versus jAmp Doubler: the parameters behind the verdict, then further details
ParameterJamFactoryjAmp Doubler
PriceFreeFree
Rating5.0 (2 ratings)5.0 (4 ratings)
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings24 — better
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS13.0 — better14.0
Further details — not scored
Size73 MB6 MB
Age rating12+4+
DeveloperJamFactoryJan Maes

Customer experience

JamFactory

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

jAmp Doubler

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

JamFactory

Subscriptions3
  • JamFactory Basis3 Days trial$2.991 Month
  • JamFactory Standard$4.991 Month
  • JamFactory Premium$9.491 Month
None

jAmp Doubler

No in-app purchases

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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