SlowMoFX vs Goniometer for Logic Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SlowMoFX
This audio effect plugin allows users to seamlessly blend incoming audio with a slowed-down version, creating unique half-speed effects. It offers adjustable slowdown speeds, filtering, and built-in effects like delay and reverb for sound manipulation.
- Half-speed audio effect
- Adjustable slowdown speeds (1.5x, 2x, 4x)
- Low and high pass filters
- Built-in delay and reverb
- Ping Pong and Reverse modes
- MIDI automation support
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SlowMoFX is an AUv3 plugin that allows you to seemlessly mix incoming audio with a slowed down version in perfect sync with the current tempo. This allows you to obtain that sort after half speed effect that is used by many famous DJ's around the world. You can dropout the original audio completely to create dark downtempo atmospheric versions of a song and slowly and seemlessly return to the original mix. This is great for drums and percussive rythms. Lead instruments with sharp attacks when slowed down give those distinctive trap melodies and booming basses. Simply press the POWER button to turn on the effect. It will smoothly transition to a mix of the original and a slow halftime version. Selecting the 4x option will slow down to quad time making the mood even darker, while the 1.5x can be used to generate triplets and syncopated beats. The low and high pass filters can be used to determine how much of the input is effected, while the mix knob controls the depth of the effect. The Glide button enables a smooth glide from the none effected pitch to the destination pitch for those slow down and speed up type effects. A ping pong mode also allows you to alternate between forwards and reverse play while the reverse mode creates long soothing syncapated textures. SlowMoFX also sports a number of built in effects that can be enabled in order to create smooth transitions such as delay and reverb, while the EQ, drive, phaser, pan and pitch effects allow you to add flavour to the sound. If running under a DAW such as AUM that allows multiple output busses you can route the effected signal through your favourite external effects. Features: • Paramter and MIDI automation of main controls. • Filtering of input using LP / HP filters. • Built in EQ, Phaser, Pan, Delay, Reverb, Drive and Pitch effects. • Fade In/Out controls. • Ping Pong and Reverse modes. • Supports buffer sizes from 1-16 beats • 2x, 4x and 1.5x slow down supported. • External Effects loop in supported apps. • Includes comprehensive Help.
Goniometer for Logic Pro
This audio analysis tool visualizes the stereo image of sound recordings. It helps users analyze and adjust stereo width, balance, and phase relationships by displaying channel information.
- Stereo image analysis
- Mid-Side (MS) and Left-Right (LR) channel display
- Relative level and phase relationship visualization
- Mono sum and channel difference analysis
- Syncs with host app waveforms
- GPU-accelerated waveform rendering
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An audio goniometer is a tool used to measure and analyze the stereo image of a sound recording. It typically allows the user to switch between Mid-Side (MS) and Left-Right (LR) channels, and can display the relative levels and phase relationships between them. The Mid channel represents the mono sum of the Left and Right channels, while the Side channel represents the difference between them. This allows for precise adjustments to the stereo width and balance of a mix, as well as the ability to convert between MS and LR formats. Is compatible with all the Host apps that support Audio Unit like Garage Band, Auria, AOM, Cubasis and much more. It syncs with your host app so that the waveforms will be in sync per beats or fractions. Built on Metal Framework use the GPU to render the waveform so is super light on CPU for processing audio.
Screenshots
Verdict
The clearest difference is review sentiment: SlowMoFX at 70% against Goniometer for Logic Pro's 25%. SlowMoFX also leads on update cadence (every 6 days vs every 3 months) and ratings volume (14 vs 2). Goniometer for Logic Pro's advantage is price (Free vs $9.99) and rating (5.0 vs 3.8). On ads, in-app purchases, device support and iOS requirement 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
Goniometer for Logic Pro is free to download; SlowMoFX costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Goniometer for Logic Pro holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: SlowMoFX has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 70% of SlowMoFX's written reviews are positive against 25% of Goniometer for Logic Pro's, so the app with the better star average is not the one people write more warmly about.
SlowMoFX ships an update every 6 days, Goniometer for Logic Pro every 3 months. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.
| Parameter | SlowMoFX | Goniometer for Logic Pro |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.8 (14 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 70.0% of reviews — better | 25.0% of reviews |
| Number of ratings | 14 — better | 2 |
| Update frequency | Every 6 days — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13 — better | 14.0 |
| Further details — not scored | ||
| Size | 12 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | 4Pockets.com | Indigogo |
Customer experience
SlowMoFX
Goniometer for Logic Pro
In-app purchases
SlowMoFX
No in-app purchases
Goniometer for Logic Pro
No in-app purchases

