Audio Hijack vs Fader: recording vs live control

Audio Hijack and Fader do different jobs. Audio Hijack is a recording and audio-processing app: you build a session, capture audio from any app or input, run it through effects, and save or stream the result. Fader is a keyboard-driven per-app volume mixer for riding app levels live. If you need to record, process, or broadcast audio, buy Audio Hijack ($69 one-time). If you just want to turn one app down or send it to a different device in a keystroke while you work, Fader ($19.99 one-time) is the faster, cheaper fit.

These two get lumped together because both "control app audio on a Mac," but they sit at opposite ends of that idea. One is a studio you set up and run. The other is a mixer that lives on your keyboard while you do everything else. Buy the wrong one and you either pay for recording power you never use, or fight a session-based tool to do a job a light utility does in a second. Here's the honest split.

What Audio Hijack actually does

Audio Hijack, from Rogue Amoeba, is a recording and audio-processing app. You open its editor and build a session by connecting blocks left to right: a source (an app like Safari or Zoom, a microphone, an input device, or all system audio), then processing blocks like a Volume fader, EQ, or other effects, then output blocks like a recorder, a broadcast, or an output device. Press the big Record button and it captures whatever is flowing through that chain to a clean file.

That's genuinely powerful, and it's why podcasters, streamers, and anyone who needs to capture Mac audio rely on it. Record a VoIP call and your mic into one track. Grab audio from an app that has no export of its own. Pipe a processed feed into a stream or a broadcast. Save web audio to a file. That's Audio Hijack's home turf, and few tools do it as cleanly. It's the kind of thing you configure once as a session and run whenever you need to capture.

The trade is that everything happens inside a session you build and run. Audio Hijack does have a Volume block, so you can turn a source up or down within a chain, but that control is part of a running session, not a global hotkey you slap mid-call from any app. It's built to record and process, and it asks session-level setup for a session-level payoff.

What Fader actually does

Fader is a per-app volume mixer that lives on letter keys. Hit a toggle hotkey and your keyboard becomes a mixer — one column of keys per app — so you ride Spotify down, push Zoom up, and mute a browser without touching the mouse or opening a window. It also does simple per-app output routing: send music to AirPods, calls to a headset, and alerts to the speakers, each app pinned to its own device. Set it once and forget it.

What Fader deliberately does not do is record, add effects, or build capture chains. There's no session to configure and no file at the end. That's the point: it removes the one friction a session-based tool carries for everyday use — you never open an editor mid-task, because the control is already under your fingers. Fader is $19.99 one-time with a 3-day free trial, and it runs on macOS 14.4 or later.

Audio Hijack vs Fader, side by side

Both are one-time purchases from small, respected Mac studios, and neither is a subscription. The difference is what each is built to do and how fast you reach a live control.

Read that as a "what's it for" chart, not a scorecard. Audio Hijack isn't losing when a row says "no" for Fader — it's simply a bigger machine aimed at capture. And Fader's blank rows are features it chose to leave out to stay fast and cheap.

Which one should you buy?

Buy Audio Hijack if you need to capture or process audio: recording a call with your mic, saving app or web audio to a file, running a podcast or stream through effects, or grabbing sound from an app that has no export of its own. If the phrase "record this and clean it up" describes your problem, Audio Hijack is the right, proven tool, and $69 for something you'll lean on for real production work is fair.

Buy Fader if your real problem is levels, not recordings: one app's always too loud, you're on calls all day and want music to duck without a menu dive, or you want to keep music on AirPods while calls go to a headset. That's per-app volume and simple routing, and paying $69 — plus the session setup — for a recording tool to do it is more app than the job needs. Fader does it in a keystroke for $19.99.

A useful gut check: if you'd describe what you want as "a mixer I can grab fast while I work," that's Fader. If you'd describe it as "a session that records and processes audio," that's Audio Hijack. For a wider look at the whole category, see the best per-app volume apps for Mac in 2026, compared.

Can they work together?

Yes, and plenty of people run both. Audio Hijack handles the sessions you set up when you need to record or process — a podcast, a captured call, a stream. Fader handles the second-to-second volume and device changes across your everyday apps the rest of the time, when you don't want a recording tool open at all. They don't overlap much: one is about producing a file or a feed, the other is about riding what you're already hearing. If routing between devices is what you actually care about rather than recording, Rogue Amoeba's Loopback is the heavier tool for that job — Loopback vs Fader covers where each one fits.

A note on being fair to Audio Hijack

Rogue Amoeba makes excellent software, and Audio Hijack has a long, well-earned reputation. Nothing here is a knock on it — it does things Fader can't and isn't trying to, and for recording Mac audio it's one of the best tools on the platform. The only mistake is buying a recording app because you saw "control app audio" and really just wanted to turn one app down without lowering everything. Match the tool to the job and both apps look great.

Bottom line

Audio Hijack is recording and processing: capture any source, run it through effects, save or broadcast the result, for $69 one-time. Fader is everyday speed: per-app volume and simple output routing from your keyboard, for $19.99 one-time. If you record, stream, or process audio, Audio Hijack. If you just want to ride app levels and send apps to devices without opening anything, that's exactly what Fader is built for.