Discord4 vs iFX Rack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Discord4
This stereo pitch-shifting delay app offers three distinct algorithms for vintage, clean, or experimental granular effects. It features tempo-synced delays, a reverb in the feedback loop, and flexible LFO modulation for extensive sound design. Control pitch shifts with MIDI and fine-tune effects with buffer size adjustments.
- Three pitch-shifting algorithms (Vintage, Clean, Granular)
- Tempo-synced and free-running delays
- Reverb in feedback loop for shimmer effects
- Flexible LFO modulation
- MIDI note control for pitch shifting
- True stereo operation with panorama controls
- Resizable vector-based GUI
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Discord4 is the Audio Damage stereo pitch shifter, in its fourth generation. Each channel has its own pitch shifter, delay, bandpass filter, and feedback, and every repeat runs back through the shifter, so the same effect can double a vocal, stack fifths into an arpeggio, or send echoes spiraling up or down. Three engines set the character. Vintage is modeled on the H910 and H949 and has their grainy, glitchy character. Modern is cleaner and more transparent. Both have a buffer control from 32 to 2048 samples that changes the character of the shift. Granular cuts the signal into grains from 15 to 100 ms long, with an interval control and a Chaos knob that scrambles them, for anything from soft clouds to complete destruction. Detune the two sides a few cents in opposite directions over a short delay for a wide doubler. Set one side a fifth up, sync the delays, and raise the feedback so each repeat climbs another step. Keep the reverb in the loop for shimmer, then hit Freeze to hold a pad under the part. Turn on MIDI Shift to play harmonies from a keyboard, or ride the pitch wheel for bends. • Three pitch-shift engines: Vintage, Modern, and Granular • True stereo: each side has its own shifter, delay, filter, feedback, and pan, or link them so the right follows the left • Up to three octaves up or down, set by the cent or locked to semitones • Delays up to two seconds per side, free-running or tempo-synced, with feedback and cross-feedback • A bandpass filter in each feedback path, set from an XY pad • A stereo reverb inside the loop, with Freeze to hold the tail indefinitely • Saturation in the loop to keep runaway feedback in check • Two flexible LFOs for pitch, delay time, and filter frequency, shaped by Wave, Skew, and Warp, free from 0.01 to 14 Hz or synced to tempo • MIDI Shift: play the shift amount from a keyboard, with pitch bend, in hosts that send MIDI to effects • A preset browser with folders and favorites, and 50 factory presets from everyday doubling to the thoroughly strange Discord4 runs as an AUv3 plugin inside any compatible iOS host, including AUM, Cubasis, Drambo, and apeMatrix, and as a standalone app with background audio for live input. It is also available for macOS, Windows, and Linux as a desktop plugin. Requires iOS 16 or later. An AUv3 host app is recommended. No subscriptions. No accounts. No nonsense. Buy it once, own it forever.
iFX Rack
This app offers a virtual analog effects rack for iOS devices, featuring meticulously modeled vintage analog processors. It includes a suite of classic effects and allows for flexible FX chain assignment and MIDI automation.
- Analog modeled virtual effects rack
- Vintage analog circuit modeling
- AUv3 support
- MIDI learnable automation
- Dynamically drag-able FX chain
- Includes VKFX effects suite
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• NEW TalkBox® Effect • NEW CloudVerb (Creatomspheric Reverb) • NEW PhatFilt Filter FX • NEW iFX AMP FX ***New FX Modules not included with ALL FX Expansion iFX Rack is an analog modeled virtual effects rack for your iOS Device. In partnership with Overloud™, we have licensed the, ever so popular VKFX™ effects suite, which is included in the initial purchase. The VKFX suite is a meticulously modeled vintage analog effect processor, which aims to recreate classic vintage hardware using actual analog circuit modeling. It has been the most beloved effects suite ever created for the desktop and our iFX Rack is providing the same exact effects to you along with a recreation of the original factory presets. iFX Rack is your all encompassing effects rack with all of the virtual effects you need in one app. Here is what is included in the initial purchase: 1. Preamp with Two band EQ 2. Stereo Auto-Pan 3. Analog Chorus 4. Tube Amplifier with Three Band EQ 5. Spring Reverb 6. Envelope and Dynamic Filter Wah 7. Opto-Compressor 8. Phase Shifter 9. Overdrive 10. Multi-Tap Tape Delay with Multiple Modes Highlights ▪ AUv3 ▪ 93 Factory Presets from VKFX Library Ported Over ▪ MIDI Learnable Automation ▪ Modulation FX Syncable ▪ Dynamically Drag-able FX Chain Slot Assignment ▪ Highly CPU Efficient coding ▪ Flexible Preset Management with Favorite Options The 17 IAPs below can be purchased as a complete package or individually: ▪ Master Limiter with Soft Clipping and Tube Saturation ▪ 11-Band EQ ▪ SUB Harm - Sub frequency modulator/enhancer ▪ AMP Combo and Speaker Simulation ▪ Degrade - Sample Quality Bit Reduction ▪ Detune - Pitch Shifter Thickener ▪ Rotar - Rotary Speaker/Leslie simulation with physical modeled parameters ▪ DimenD - Dimension D Chorus emulation ▪ DISTORTIT - Nasty Distortion unit ▪ Stereo Widener Chorus - Turns any mono sound into a stereo with slight warm chorusing ▪ ST Widener Enhancer - Enhance stereo signals with Safe Bass frequency option to keep mono and two spread modes ▪ Amp Sim - A convolution IR with popular AMP Simulations ▪ FVerb - Schroeder Algorithmic Reverb ▪ MVerb - Dattorro's figure-of-eight Algorithmic Reverb ▪ Spring Reverb - Rare and vintage spring reverbs ▪ Flanger - Warm Flanger effect ▪ FantasyVerb - A convolution reverb containing iconic spaces and analog reverbs such as: **All other future FX will not be included in the 17 FX Bundle. You will Need to purchase them separately. --------- Terms and Privacy Notices: • EULA Terms of use - https://gospelmusicians.com/EULA.html • Privacy Policy - https://gospelmusicians.com/privacy-policy.html • Terms and Conditions - https://gospelmusicians.com/terms-conditions.html
Screenshots
Verdict
The clearest difference is rating: Discord4 at 4.7 against iFX Rack's 3.8. Discord4 also leads on in-app purchases (none vs 10) and price ($8.99 vs $9.99). iFX Rack's advantage is update cadence (monthly vs every 14 months) and review sentiment (70% vs 61%). On ratings volume, 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
Discord4 costs $8.99 and iFX Rack $9.99 up front. iFX Rack sells 10 one-off in-app purchases. Discord4 asks for nothing beyond the download.
Discord4 holds the better App Store score, 4.7 against 3.8. Both are backed by a comparable volume of ratings — 29 and 10 respectively. Written reviews complicate that: 61% of Discord4's written reviews are positive against 70% of iFX Rack's, so the app with the better star average is not the one people write more warmly about.
Discord4 ships an update every 14 months, iFX Rack monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Discord4 | iFX Rack |
|---|---|---|
| Price | $8.99 — better | $9.99 |
| Rating | 4.7 (29 ratings) — better | 3.8 (10 ratings) |
| Positive reviews | 61.1% of reviews | 69.6% of reviews — better |
| Number of ratings | 29 — better | 10 |
| Update frequency | Every 14 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 279 MB |
| Age rating | 4+ | 4+ |
| Developer | Audio Damage, Inc. | MIDIculous LLC |
Customer experience
Discord4
iFX Rack
In-app purchases
Discord4
No in-app purchases
iFX Rack
- Distortit$0.99
- Amp Combo$1.99
- FantasyVerb$3.99
Show 7 moreShow fewer
- iFX Amp$3.99
- PhatFilt$3.99
- Talkbox® Effect$3.99
- IMPULSation for iFX Rack$6.99
- Phick Analog Thickener$6.99
- Additional Effects Bundle$7.99
- CloudVerb$9.99









