Comparison

FAC Gravity vs MicroLag

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

Head to head
About

FAC Gravity

Features
Read full description

FAC Gravity AUv3 Plugin is a frequency shifter for creating Barberpole and Shepard style glissandos, spectral illusions, stereo rotation, chorusing, phasing, evolving echoes, infinite cosmic spaces, and all the combinations you’ll make. The plugin gives you two ways to process the audio source. In Stereo mode, each channel is shifted independently, with a Ratio control determining how closely their frequency shifts align. In Mono mode, FAC Gravity extends the internal quadrature processing to create a wide stereo image from the mono source. The frequency shift can move up or down, from subtle to more extreme spectral transformations. You can set the amount in Hz for classic Bode-style frequency shifting, make it follow your host tempo for rhythmic patterns, or even control it from MIDI notes for a more hands-on approach. A new dimension appears when you let the shifter feed back into itself with Spiral, a customizable loop with delay, blur, filtering, and different characters that shape how the sound circles, smears, interacts, and evolves over time. The result can range from bubbling textures to infinite sustained tones and noisy analog self-oscillation. Each character takes the feedback somewhere different. To dive deeper into new sonic dimensions, FAC Gravity comes with its own modulation module. The LFO, envelope follower, and flexible modulation matrix let you animate most parameters, from subtle evolving movements to complex, rhythmically reactive changes. You can even make the stereo field animate and rotate continuously by making the Width, Phase, and Pan parameters spin! You can shape the effect further by blending the processed signal with the original, while the optional limiter keeps the most extreme combinations in check. • Barberpole glissandos, spectral illusions, rotating stereo, evolving echoes • Dual Frequency Shifting, or Mono Shifting with Quadrature Stereo Widening • Organic Spiral Loop, from gentle feedback to pure analog self-oscillation • Integrated delay, diffusion blur, and independent low/high filtering • Modulation matrix, multi-source envelope follower • LFO with classic waveforms and random spline • Spinning modulation to rotate and animate the stereo field • Tempo-synced or MIDI-driven Frequency Shift, LFO, and Delay • Dry/Wet mix, optional limiting, and goniometer visualization • Advanced Responsive Design, portrait and landscape views • Universal Purchase: AUv3 for iOS (iPad/iPhone), macOS and Vision Pro The documentation is available at fredantoncorvest.com/FAC_Gravity.html This is an AUv3 Effect and requires a compatible host to work The in-app purchases are for tipping only, the app is fully functional without them

About

MicroLag

This audio processor allows precise delay time adjustments in exact sample counts. It offers long delay times and smooth toggling between dry and delayed signals, displaying the delay in milliseconds.

Highlights
  • Set delay time in exact samples
  • Long delay times (up to 1 second at 48KHz)
  • Smoothly toggle between dry and delayed signal
  • Displays actual delay time in milliseconds
  • AUv3 effects plugin
  • Standalone or host compatible
Read full description

MicroLag is a delay audio processor that allows you to set the delay time in an exact number of samples. While there are already quite a few sample delay plugins available, I couldn’t find one that quite fit my needs, so I made one. MicroLag allows you to set relatively long delay times, e.g. up to around 1 second at 48KHz sampling rate. You can also smoothly toggle between the delayed and bypassed / dry signal. Finally, the actual delay time in milliseconds (depending on the host sample rate) is displayed. That’s basically it! MicroLag is an AUv3 effects plugin that can run standalone, or in any AUv3 compatible host such as Logic Pro, GarageBand or AUM. MicroLag currently runs on iPadOS / iOS (iPad & iPhone) and macOS (Intel & Silicon) and is available as a Universal Purchase from the Apple App Store. If you’re planning on using MicroLag on Mac / desktop, please ensure that your favourite DAW / host supports AUv3 (not just AU).

Screenshots

FAC Gravity4 screens
MicroLag1 screens

Verdict

The call

The clearest difference is in-app purchases: MicroLag at none against FAC Gravity's 3. MicroLag also leads on price ($1.99 vs $8.49) and iOS requirement (13.0 vs 17.0). On ads 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

FAC Gravity costs $8.49 and MicroLag $1.99 up front. FAC Gravity sells 3 one-off in-app purchases. MicroLag asks for nothing beyond the download.

Scorecard3 real differences · 5 level
FAC Gravity versus MicroLag: the parameters behind the verdict, then further details
ParameterFAC GravityMicroLag
Price$8.49$1.99 — better
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Mac — better
Requires iOS17.013.0 — better
Further details — not scored
Size4 MB18 MB
Age rating4+4+
DeveloperFrederic CorvestRob Jackson

In-app purchases

3 purchases

FAC Gravity

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$14.99
None

MicroLag

No in-app purchases

Questions

Is FAC Gravity free?
FAC Gravity costs $8.49, and also offers in-app purchases.
Is MicroLag free?
MicroLag costs $1.99, with no in-app purchases.
Do FAC Gravity or MicroLag have ads?
Neither FAC Gravity nor MicroLag shows ads.

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