Comparison

KORG EZ Rec vs GRFX

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

Head to head
About

KORG EZ Rec

Easily record piano performances on your iPhone, capturing both video and audio in one seamless process. Enhance your recordings with simple editing tools before sharing or saving them. Enjoy a stress-free, ad-free music creation experience.

Highlights
  • Record piano performances with KORG PianoRec
  • Simultaneous video and audio recording
  • Simple editing tools
  • Share or save recordings
  • Ad-free experience
  • Use with built-in microphone
Read full description

Capture your music, your way. EZ Rec makes recording easy. 1.Pair with KORG PianoRec to easily and intuitively record piano performances on your iPhone. 2.Record video and audio with ease. No more switching between apps. 3.Add the finishing touches to your recordings with the simple editing tools in EZ Rec, then share them or save them to your camera roll. 4.No annoying ads! Have a fun, stress-free recording experience. Important notes - For iPhones with a Lightning connector, an Apple Lightning to USB 3 Camera Adapter is required for use with PianoRec. - It may take a few seconds for EZ Rec to recognize PianoRec after connecting to your iPhone. If it is not recognized after a few seconds, please check the connection. - EZ Rec can also be used with the built-in microphone, but all recorded audio will be mono instead of stereo. - For instructions on connecting to PianoRec, please refer to the "How to connect with PianoRec" screen in EZ Rec.

About

GRFX

Transform ordinary audio into unique sonic textures, evolving soundscapes, and rhythmic glitches. This app offers precise control over sound manipulation with a unique pitch controller, multiple LFOs, and a flexible multi-effect chain. Create complex and immersive audio transformations in real-time.

Highlights
  • Granular engine for textures and rhythms
  • Harmonic Triangle pitch controller
  • Multi-effect chain with probabilistic routing
  • Four self-modulating LFOs
  • Real-time audio sculpting
  • AUv3 plugin and standalone app
Features
Read full description

GRFX is a powerful and creative granular effects processor that turns ordinary audio into extraordinary sonic landscapes. Slice your sound into grains and reshape them into evolving textures, shimmering chords, rhythmic glitches, haunting drones, and more. At the heart of GRFX is the Harmonic Triangle – an intuitive 3-way pitch controller that lets you morph simple tones into lush pads, arpeggiated patterns, or abstract gestures. Whether you’re aiming for organic soundscapes or synchronized stutters, GRFX gives you precise control over the flow of grains and modulation. Build complexity with four self-modulating LFOs, a multi-effect chain with probabilistic routing, and an elegant drag-and-drop modulation system. Shape your sound, modulate nearly every parameter, and sculpt immersive audio transformations in real time. Key Features: - Granular engine for creating textures, rhythms, chords, glitches, drones, ambiences, and more - Harmonic Triangle for 3-way pitch control, detuning, and microtonality - Built-in Chord Selector with 32 triads for instant harmonic richness - Grain envelope shaping for plucky, smooth, or abrupt grains - Buffer size, division, sync, and freeze controls - Rhythmic synchronization for tempo-synced effects and patterns - 4 LFOs with self-modulation and drag-and-drop assignment - Modulation panel & view mode for streamlined modulation management - 2 Multi-Effect slots (Filter, Distortion, Delay, Peak EQ, Chorus, Phaser, Bitcrusher, Reverb) with probability-based routing - Dedicated Send FX with Delay and Reverb in series or parallel mode - Flexible mixer section for sculpting wet/dry balance and routing AUv3 Audio Unit plugin – requires an AUv3-compatible host app such as Logic Pro, GarageBand, AUM, or Cubasis. Standalone version included.

Screenshots

KORG EZ Rec4 screens
GRFX4 screens

Verdict

The call

The clearest difference is price: KORG EZ Rec at Free against GRFX's $6.99. KORG EZ Rec also leads on rating (5.0 vs 4.6). GRFX's advantage is ratings volume (10 vs 1). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

KORG EZ Rec is free to download; GRFX costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

KORG EZ Rec holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: GRFX has 10 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

KORG EZ Rec ships an update every 5 weeks, GRFX every 2 months. The most recent releases landed on October 21, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
KORG EZ Rec versus GRFX: the parameters behind the verdict, then further details
ParameterKORG EZ RecGRFX
PriceFree — better$6.99
Rating5.0 (1 ratings) — better4.6 (10 ratings)
Positive reviews—77.8% of reviews
Number of ratings110 — better
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhoneiPhone, iPad — better
Requires iOS16.6 — better17.0
Further details — not scored
Size6 MB117 MB
Age rating4+4+
DeveloperKORG INC.Imaginando Lda

Customer experience

KORG EZ Rec

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

GRFX

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews9 reviews
Positive77.8%
Neutral0.0%
Negative22.2%

In-app purchases

None

KORG EZ Rec

No in-app purchases

None

GRFX

No in-app purchases

Questions

Is KORG EZ Rec free?
KORG EZ Rec is free to download, with no in-app purchases.
Is GRFX free?
GRFX costs $6.99, with no in-app purchases.
Which has better reviews, KORG EZ Rec or GRFX?
KORG EZ Rec is rated higher. KORG EZ Rec averages 5.0 out of 5 from 1 ratings, while GRFX averages 4.6 from 10 ratings.
Do KORG EZ Rec or GRFX have ads?
Neither KORG EZ Rec nor GRFX shows ads.
Which is updated more often, KORG EZ Rec or GRFX?
KORG EZ Rec ships an update every 5 weeks, and GRFX every 2 months. Most recently, KORG EZ Rec was updated on October 21, 2026 and GRFX on October 30, 2026.

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