Comparison

Sidechain Compressor Plugin vs AutoMaster

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

Head to head
About

Sidechain Compressor Plugin

This audio plugin enables side-chain compression for music production, creating rhythmic pumping effects. It offers true side-chaining in compatible DAWs and a unique sudo side-chain method for broader compatibility.

Highlights
  • Standard compressor features
  • Real calibrated VU and reduction meters
  • Real-time visual graphing
  • True sidechain in AUM
  • Sudo sidechain with MASTER/SLAVE
  • 3 available busses
  • Mono/Stereo modes
Features
Read full description

This is an AUv3 compatible stereo compressor plugin which is intended for use inside your favourite DAW/HOST such as AUM, Cubasis, Auria, Meteor, AUM or GarageBand etc. So lets start by answering the question what is side chaining?  Side chaining is a technique used in a lot of modern dance music which involves using the volume level of one sound source to control another. You can hear plenty of examples of this in modern Trance/Dubstep music where sound engineers use the impact of a bass drum to duck a sustained string sound, creating space in the mix. This can be heard as a rythmic pumping sound which gives your music drive and energy. This compressor is quite unique since it was designed to get around the limitations of AUv3 plugins on iOS and the lack of multi-audio routing inside DAW apps. Until recently it wasn't possible to do true side chaining using AUv3, but now AUM has recently integrated support for multiple inputs and outputs per AUv3 plugin, it opens up a whole new world of possibilities. This is great for AUM users, but this still leaves users of other DAW's in the dark. This is where this app has you covered as it provides a method of sudo side-chaining by allowing you to attach two instances of this plugin to multiple sources and route audio between them to achieve a sudo sidechain. This works by ensuring two instances of the plugin are loaded as insert effects, one being the MASTER and the other a SLAVE. The slave sends audio to the master by means of one of 3 available busses. True side chaining can be achieved in AUM. Simple set the SideChain Mode to 'Normal' and install an instance of the plugin on the channel you want to control. Then using the new 'Multiple Audio Unit Instances' option in AUM you can add a redirection of the controlling source to send to the same bus the plugin is listening to. It's that simple. In this case you need to set both instances to either Bus 2 or 3, since Bus 1 is the original audio. Features: ○ Standard Compressor features. ○ Real calibrated VU and reduction meters ○ Real-time visual graphing of parameters. ○ Real sidechain in AUM. ○ Sudo side chain using MASTER and SLAVE for others. ○ 3 available busses. ○ Mono / Stereo modes. ○ Integrated help.

About

AutoMaster

Features
Read full description

AutoMaster is the simple way to make your music sound professional — without complex plugins or hours of learning. Load an MP3 or WAV file and AutoMaster handles the mastering automatically: it balances the frequency spectrum, adds cohesion, raises loudness to streaming-ready levels and protects peaks with a limiter. KEY FEATURES - One-tap automatic mastering - EQ, compression and limiting in a single chain - Loudness normalization to your chosen LUFS target (streaming, louder, club) - Genre presets: Deep House, Melodic Techno, Vocal Trance, Electro House, EDM, Drum & Bass, Pop, Rock, Hip-Hop and more - Before / after preview — compare the result instantly - Export a finished WAV file - Save your own custom presets WHO IT'S FOR For music creators, producers and hobbyists who want to give their tracks a professional, release-ready sound quickly. All processing happens locally on your device — your files never leave your phone. SUBSCRIPTION AutoMaster Pro unlocks WAV export and all genre presets. The subscription renews automatically every month until cancelled. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Sidechain Compressor Plugin4 screens
AutoMaster4 screens

Verdict

The call

The clearest difference is price: AutoMaster at Free against Sidechain Compressor Plugin's $5.99. AutoMaster also leads on update cadence (every 6 weeks vs every 67 months). Sidechain Compressor Plugin's advantage is iOS requirement (11.0 vs 26.5). On ads, in-app purchases and device support 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

AutoMaster is free to download; Sidechain Compressor Plugin costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sidechain Compressor Plugin ships an update every 67 months, AutoMaster every 6 weeks. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Sidechain Compressor Plugin versus AutoMaster: the parameters behind the verdict, then further details
ParameterSidechain Compressor PluginAutoMaster
Price$5.99Free — better
Rating3.8 (6 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings6 — better—
Update frequencyEvery 67 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better26.5
Further details — not scored
Size12 MB3 MB
Age rating4+4+
Developer4Pockets.comLukasz Gad

In-app purchases

None

Sidechain Compressor Plugin

No in-app purchases

None

AutoMaster

No in-app purchases

Questions

Is Sidechain Compressor Plugin free?
Sidechain Compressor Plugin costs $5.99, with no in-app purchases.
Is AutoMaster free?
AutoMaster is free to download, with no in-app purchases.
Do Sidechain Compressor Plugin or AutoMaster have ads?
Neither Sidechain Compressor Plugin nor AutoMaster shows ads.
Which is updated more often, Sidechain Compressor Plugin or AutoMaster?
Sidechain Compressor Plugin ships an update every 67 months, and AutoMaster every 6 weeks. Most recently, Sidechain Compressor Plugin was updated on October 8, 2026 and AutoMaster on October 6, 2026.

Other comparisons