ABSeq: A/B Audio Compare

ABSeq: A/B Audio Compare

Mix Reference & Loudness Match

4 ratings
4 reviews
Free
In-App PurchasesWith Ads

Details

Released
May 21, 2024
Updated
October 29, 2026

Features

ABSeq: A/B Audio Compare screenshot #1 for iPhone
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ABSeq: A/B Audio Compare screenshot #8 for iPhone
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About

This app allows music producers to compare up to four audio files simultaneously, with automatic loudness matching to ensure fair comparisons. It offers blind testing modes, detailed analysis tools like LUFS meters and spectrum analyzers, and supports various audio file formats. Sessions can be saved and reopened, with advanced features available through a Pro subscription.

✓A/B audio comparison
✓Automatic loudness matching (LUFS)
✓Blind A/B testing
✓LUFS meter and True Peak
✓Live spectrum analyzer
✓Sequencer for track stepping
✓Car test and headphone check
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What's New in ABSeq

2.0

October 29, 2026

ABSeq 2.0 is a complete redesign. • A/B comparison, blind tests and LUFS are now free. Pro is optional. • Blind A/B test with shuffled, level-matched rounds and a tally of your picks • LUFS, true peak and streaming loudness estimates on every track • Live spectrum, plus Pro loudness, tonal balance and A/B difference graphs • Saved sessions, lock-screen playback and a quick tutorial • Two-screen layouts on iPad and foldable iPhone Existing Pro subscribers and Lifetime owners keep everything, now with iCloud sync and the Pro graphs.

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Subscriptions & In-App Purchases

ABSeq Pro Monthly

Pro graphs, unlimited saves and iCloud sync.

$2.991 Month
How to cancel ABSeq subscription ⁉️

User reviews

Perfect!

Been wanting something like this for a long time, reference a lot of mixes on my phone and this is super helpful

Where are the features?

This app is missing the most basic feature of an AB test app - the ability to blindly evaluate two audio files.

To me, the goals of an AB test are to:

1. determine if one can hear a difference at all between the files

2. determine if one has a preference for either of the two files, or can blindly identify them by sound alone.

This app is so close to being extremely helpful, but it’s extremely feature-bare for the wildly high price of $15/year.

Here’s how it should work in my view; the app has three buttons: A, B and X. You import two files. The names are hidden from the user but retained by the app. The two files are randomly placed on one of the three buttons, and a duplicate of one of the files chosen at random is placed on the third button.

You listen to the three of the files, and depending on the mode, you are asked by the app to either identify which file is which, or which file you prefer.

You repeat this process perhaps 5 or 10 times, with new randomization of the above factors each time. Then, the app reveals to you how many times out of 10 you chose each file as the favorite, or how many times out of 10 you correctly identified each file.

I would be happy to pay $15 for an app that does this well, similar to ABX Tester on Mac. However, this app lacks every single feature necessary for me to derive any value from its AB test functionality.
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Exactly what I needed. Amazing

I reference mixes as I work on them using Apple headphones connected to my phone, but I’ve just used the Files app until I found this. It’s a huge upgrade being able to a to Files, instead of bouncing back-and-forth between opening different files. I think the audio quality is the same as the Files app on the iPhone, but it may be slightly different. My only critique would be to make sure that the audio quality is exactly the same as the audio files, so that you’re not getting a warped perspective of what things sound like.
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Game changer

Legitimately such a useful tool for testing music. Game changer for my own productions and helping clients decide between versions

Developer apps

FAQ

What is ABSeq used for?

ABSeq is an A/B comparison tool for music producers and engineers. It allows you to load and switch between multiple audio files, such as different mixes or reference tracks, to make objective listening decisions.

Does ABSeq have ads?

Yes, ABSeq contains advertisements. As a free app with in-app purchases, it utilizes ads to support its development and features.

What audio file formats does ABSeq support?

ABSeq supports common audio file formats including WAV, AIFF, FLAC, MP3, M4A, and AAC. These files can be opened directly from your device's Files app.

How does the blind A/B test work in ABSeq?

In blind A/B testing mode, ABSeq hides the identity of the tracks and shuffles them each round. You pick your preferred track each round, and at the end, the app reveals which mix you favored and how often, ensuring judgments are based on sound, not familiarity.

What are the features of ABSeq Pro?

ABSeq Pro unlocks advanced features such as loudness graphs, tonal balance views, and A/B difference curves. It also provides unlimited saved sessions and iCloud sync, compared to the free tier's limit of 3 saved sessions.

How can I manage or cancel my ABSeq Pro subscription?

You can manage or cancel your ABSeq Pro subscription through your Apple Account settings. Navigate to Settings → Apple Account → Subscriptions to adjust your subscription preferences.

Is ABSeq available on both iPhone and iPad?

Yes, ABSeq is designed for both iPhone and iPad. It offers optimized two-screen layouts for iPad and supports foldable iPhones.

How often is ABSeq updated?

ABSeq was last updated on October 29, 2026, with version 2.0. This indicates a recent update, suggesting ongoing development and support for the application.