Comparison

iFX Rack vs Model D6

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

Head to head
About

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.

Highlights
  • Analog modeled virtual effects rack
  • Vintage analog circuit modeling
  • AUv3 support
  • MIDI learnable automation
  • Dynamically drag-able FX chain
  • Includes VKFX effects suite
Features
Read full description

• 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

About

Model D6

This app is a physical modeling emulation of the classic Hohner Clavinet D6 keyboard. It recreates the iconic funky sounds used in 70s music and offers extensive sound shaping capabilities with built-in effects and amp simulations.

Highlights
  • Physical Modeling engine
  • Authentic D6 filter recreation
  • Adjustable pickup positions
  • Built-in Wah-Wah, Phaser, Delay, and Reverb effects
  • Amplifier simulator with 5 models
  • Responds to pitch bender and aftertouch
Features
Read full description

GSi Model D6 is a physical modeling emulation of a Hohner Clavinet D6. INSTRUMENT BACKGROUND It was back in the fifties when German inventor Ernst Zacharias invented one of the funkiest keyboards of all times. At first the intention was to make a portable version of a harpsichord, but it soon turned into one of the most used keyboards in rock and pop music. You will certainly recognize it in the famous pop song "Superstition", and in many other funky tunes of the seventies. Many police and investigation story movies and TV shows of the 70's and the early 80's had music themes based on funky accompaniments made with the D6, a slap bass and drums. This instrument can reproduce the sound of an electric guitar and can be treated with the same effects used by guitarists (wah-wah, distortion, phaser, chorus, etc.) for both rhythmic and melodic textures, since it is actually based on a set of 60 strings and two humbucker pickups very similar to those used in electric guitars. The sound engine of GSi Model D6 comes from the exact same code that powers the GSi Gemini and the Crumar Seven as well as the Crumar Mojo 61. Some more parameters have been added to the model in order to make the instrument sound even more versatile and adjustable to personal taste. Main features: - Physical Modeling engine (no samples) - Full Polyphony (60 strings) - Authentic string sympathetic resonances - Authentic recreation of the 4 D6 filters - Two Pickups with adjustable positions - Authentic damper lever - String quality setting - Hammer Tip quality setting - Wool damper quality setting (Release length) - Responds to pitch bender (Whammy bar mod) - Responds to aftertouch (string tapping overpressure) - Built-in Wah-Wah effect modeled after the famous JH-1 pedal - Wah-Wah can be modulated by LFO, Dynamics or via Midi CC message - Built-in Phaser effect modeled after the famous Phase 90 pedal - Built-in Amplifier simulator with 5 models (Twin, JCM, AC, RJC and Bass) - Amp Distortion and pickup feedback - Built-in Stereo Delay effect - Built-in Stereo Reverb effect - Built-in programmer with unlimited Programs - Embedded user's' manual - Available as Stand-alone application and audio plugin - Very low CPU and RAM usage

Screenshots

iFX Rack4 screens
Model D62 screens

Verdict

The call

The clearest difference is price: iFX Rack at $9.99 against Model D6's $19.99. iFX Rack also leads on update cadence (monthly vs every 9 months). Model D6's advantage is rating (5.0 vs 3.8) and in-app purchases (none vs 20). On review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

iFX Rack costs $9.99 and Model D6 $19.99 up front. iFX Rack sells 20 one-off in-app purchases. Model D6 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Model D6 holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 10 and 5 respectively. Written reviews complicate that: 70% of iFX Rack's written reviews are positive against 67% of Model D6's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

iFX Rack ships an update monthly, Model D6 every 9 months. The most recent releases landed on September 30, 2026 and September 24, 2026 respectively.

Scorecard5 real differences · 5 level
iFX Rack versus Model D6: the parameters behind the verdict, then further details
ParameteriFX RackModel D6
Price$9.99 — better$19.99
Rating3.8 (10 ratings)5.0 (5 ratings) — better
Positive reviews69.6% of reviews — better66.7% of reviews
Number of ratings10 — better5
Update frequencyMonthly — betterEvery 9 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.011.0
Further details — not scored
Size279 MB13 MB
Age rating4+4+
DeveloperMIDIculous LLCGenuine Soundware

Customer experience

iFX Rack

All ratings10 ratings
Positive70.0%
Neutral0.0%
Negative30.0%
Written reviews23 reviews
Positive69.6%
Neutral8.7%
Negative21.7%

Model D6

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

20 purchases

iFX Rack

One-time20
  • Distortit$0.99
  • Spring Reverb$0.99
  • Flanger$0.99
Show 17 more
  • 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
None

Model D6

No in-app purchases

Questions

Is iFX Rack free?
iFX Rack costs $9.99, and also offers in-app purchases.
Is Model D6 free?
Model D6 costs $19.99, with no in-app purchases.
Which has better reviews, iFX Rack or Model D6?
Model D6 is rated higher. iFX Rack averages 3.8 out of 5 from 10 ratings, while Model D6 averages 5.0 from 5 ratings.
Do iFX Rack or Model D6 have ads?
Neither iFX Rack nor Model D6 shows ads.
Which is updated more often, iFX Rack or Model D6?
iFX Rack ships an update monthly, and Model D6 every 9 months. Most recently, iFX Rack was updated on September 30, 2026 and Model D6 on September 24, 2026.

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