iFX Rack vs OLI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
OLI
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OLI turns sound into something you can see. Play a frequency and sand on a vibrating plate organises itself into the standing-wave figure that frequency produces. Point the microphone at music, an instrument, or a singing voice, and the plate follows what it hears, live. REAL PHYSICS, NOT AN ANIMATION The plate is a simulation of the actual mechanism Ernst Chladni demonstrated in 1787. Grains migrate down the amplitude gradient — the direction the surface moves away from them — and stick where the plate is too quiet to lift them. That is why the lines are sharp, why the figure settles and holds, and why the same frequency always draws the same shape. The nodal function is the real one for a square plate with free edges. Nothing is pre-drawn. WHAT YOU CAN DO • Tune any frequency from 20 Hz to 4 kHz, by number or by sweep • Listen — the microphone drives the plate from any sound in the room • Pick a figure and get the exact frequency that draws it • Mix several modes; the plate shows their superposition, as a real plate would • Watch in Light mode, where the tone is raised about 40 octaves into visible light and the colour is that wavelength • Projector mode: full screen, no controls, for a room 186 PRESETS, EACH LABELLED WITH WHAT IT ACTUALLY IS Planetary tones from orbital periods. Pulsar spin rates that are audible with no scaling at all. Schumann resonances. Molecular and quantum frequencies. The tuned granite pillars at Hampi, computed from beam theory. Fungal electrical rhythms. Singing bowls, wind chimes, temple bells and a tuning fork, modelled from their partials rather than sampled. Every one carries a tag: measured physics, exact mathematics, musical tradition, physical model, chosen for feel, or popular but unverified. Where something is folklore, it says so. NO HEALTH CLAIMS OLI makes none, anywhere, ever. It is an instrument and a physics toy. Frequencies named for a tradition are labelled as tradition, not as medicine. FREE, WITH NO ACCOUNT The tone generator at any frequency, the full plate simulation, patterns and mixes, projector mode, and the microphone. Sound made visible is not the paid part. OLI PRO • The full library of 186 presets across 21 categories • Instruments and textures: bowls, chimes, bells, gong, conch, throat singing • The sound builder — design a voice from its partials • Saving and sync across your devices • Export the plate as a wallpaper Monthly $2.99, Annual $17.99, or Lifetime $34.99 paid once. Both subscriptions begin with 7 days free. Payment is charged to your Apple Account at confirmation. A subscription renews automatically unless cancelled at least 24 hours before the period ends, and you can manage or cancel it in your Apple Account settings. Any unused part of a free trial is forfeited when a subscription is purchased. Privacy Policy: https://oli.red-triangle.net/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ THE MICROPHONE Audio is analysed on your device, in the moment, to find the frequencies in it. Nothing is recorded, stored, or sent anywhere. OLI stays silent while listening — a live microphone routed to the speakers it is hearing would howl — so play your music from anywhere and watch the plate follow it.
Screenshots
Verdict
The clearest difference is price: OLI at Free against iFX Rack's $9.99. OLI also leads on update cadence (weekly vs monthly). iFX Rack's advantage is iOS requirement (11.0 vs 15.0). On ads, in-app purchases 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
OLI is free to download; iFX Rack costs $9.99 up front. iFX Rack sells 20 one-off in-app purchases and OLI sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
iFX Rack ships an update monthly, OLI weekly. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | iFX Rack | OLI |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.8 (10 ratings) — better | — |
| Positive reviews | 69.6% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 279 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | MIDIculous LLC | Shankareswary THANGAVELOO |
In-app purchases
iFX Rack
- Distortit$0.99
- Spring Reverb$0.99
- Flanger$0.99
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- Amp Combo$1.99
- SUB Harm$1.99
- Amp Sim$2.99
- DimenD Chorus$2.99
- Detune$2.99
- FantasyVerb$3.99
- 11 Band EQ$3.99
- ST Widener Enhancer$3.99
- iFX Amp$3.99
- PhatFilt$3.99
- Talkbox® Effect$3.99
- Rotar$4.99
- Master Limiter$4.99
- IMPULSation for iFX Rack$6.99
- Phick Analog Thickener$6.99
- Additional Effects Bundle$7.99
- CloudVerb$9.99
OLI
- OLI Pro — Monthly7 Days trial$2.991 Month
- OLI Pro — Annual7 Days trial$17.991 Year
- OLI Pro — Lifetime$34.99









