Comparison

auGEN X vs GRM studio

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

Head to head
About

auGEN X

This app generates a wide variety of audio signals for both creative sound design and precise audio system testing. It features a versatile oscillator, noise generator, and impulse generator, functioning as a standalone app or an AUv3 Audio Unit Extension.

Highlights
  • Full-featured audio oscillator with 4 wave shapes
  • High-quality noise generator (white and pink)
  • Impulse generator for reverb testing
  • AUv3 Audio Unit Extension and Stand-Alone App
  • MIDI In and BPM Sync support
  • Precise signal control with intuitive UI
Features
Read full description

auGEN X bridges the creative musical world of artists with the exacting scientific world of audio engineers. What started as a precision audio test utility has grown into a fun experimental sound design instrument. On one end use auGEN X to help set up, test, calibrate, and optimize your audio system. On the other use it to create a wide variety of interesting sounds. auGEN X has a full-featured audio oscillator, a high quality noise generator, and an impulse generator. The simple yet powerful user interface is designed for fast, precise, intuitive control over your signals. auGEN X works both as a Stand-Alone App and as an AUv3 Audio Unit Extension responding to MIDI In and BPM Sync from Hosts. I started making this app because as an audio electronics engineer I could not find a single audio generator that does everything that I require AND is an AUv3 Audio Unit. auGEN X has expanded into a musical tool for exploring and learning sound design. Our goal is for auGEN X to be an Essential in your audio toolbox. We hope you enjoy it and we’re excited to hear the cool things that you do with auGEN X! "I really see this app becoming a standard and a must have component in one's iOS audio app arsenal." - Paul Henry, Paul Henry Pro Audio FEATURES - Oscillator - 3 Modes: Fixed, Frequency or Level Sweep - 4 Wave Shapes: Sine, Triangle, Rectangle, & Saw - Tri & Rect have a Duty Cycle control (1.0% to 99.0%) - Tri, Saw, & Rect are alias-suppressed yielding virtually alias-free performance at musical fundamental frequencies - 10 to 20,480 Hz extended audio frequency range (great for testing subwoofers!) - Full-featured Frequency or Level Sweep with 5 Types, settable Direction, & selectable Repeat or 1-Shot Mode - Sweep Period has a wicked wide range from 1/10,000th of a second to 100 seconds and can alternatively be set as a Sweep Rate in Hz or BPM - Wide sweep range allows for FM & AM style sounds - Noise Generator - 2 Modes: Fixed or Level Sweep - White or Pink Noise - Pink Noise conforms to SMPTE Standard 2095-1:2015 Calibration Reference Wideband Digital Pink Noise Signal - Impulse Generator (useful for checking reverb algorithms) - Impulse Width can be set in samples - AUv3 Audio Unit Extension or Stand-Alone App - Verified to work great in AUv3 Hosts such as GarageBand, Cubasis, AUM, apeMatrix, BeatMaker 3, & Auria Pro - As a Stand-Alone App audio is sent to iPad's built-in speakers, Headphone/Line Out, or to any iOS-compatible USB audio interface connected to the Lightning jack APPLICATIONS - Creative experimental sound design - Sound effects for film, TV, & games - Great chiptune style sounds - Synthesize sirens or alarms - Test, characterize audio equipment - Set up or dial in a home theater - Tune car audio systems - Test subwoofers - Hearing tests - Ear training - Vibration analysis SPECIFICATIONS - Audio signal path uses state of the art Double Precision 64-bit Floating Point for maximum accuracy - Stereo out - Selectable Pan Laws include Linear & Constant Power Panning - Supports 44.1, 48, 88.2, & 96 kHz sample rates - User Guide embedded in App - no internet connection required to read it SYSTEM REQUIREMENTS - Compatible with iOS 9.0 & up (iPad 2, iPad mini (1st Generation), & up) - Support way back to iOS 9 means auGEN X works on every iPad model (except the very first iPad). Breathe new life into your old iPad by using auGEN X to make it a dedicated, precision audio source. - AUv3 Audio Unit Extensions require iPad 4, iPad mini 2, and up - 88.2 & 96 kHz sample rate require iOS-compatible USB audio interface connected to the Lightning jack Watch demos & tutorials on auDSPr's YouTube channel. Subscribe on YouTube: https://youtube.com/channel/UCRZm2cKWVJVfK-l9zrnMeFg Like Us on Facebook: https://facebook.com/AUDSPr-1392948064183211 Follow Us on Twitter: https://twitter.com/auDSPr Keep your ears and eyes open for more upcoming auDSPr audio apps!

About

GRM studio

This music creation app offers advanced sound manipulation tools for musicians and sound designers. Explore and edit audio files through direct waveform manipulation and multiple playback processes.

Highlights
  • Real-time sound transformation simulation
  • Direct waveform exploration
  • Virtual editing and montage
  • Multiple playback processes
  • Granular synthesis
Features
Read full description

GRM studio est une application de création musicale . Elle permet de puissantes transformations sonores par la manipulation directe de représentations audionumériques et l’expérimentation de processus de lectures multiples sur des documents sonores. Cette nouvelle lutherie est mise à disposition grâce au soutien du programme Investissements d’Avenir (PIA-SINÉ). Elle complète la collection de ressources de l’INA-GRM disponible sur Éduthèque « Écouter, voir, comprendre les musiques électroacoustiques et les technologies de création sonore » . Pionnier des musiques concrètes, électroacoustiques, acousmatiques, le Groupe de Recherches Musicales (GRM) développe depuis 1958, des dispositifs créatifs de traitement du son à l’usage des musiciens, des compositeurs, des designers sonores Fonctionnalités : - Simulation temps réel des principales transformations du son . Transpositions, time streching, délais, boucles mobiles, synthèse granulaire,etc. - Toutes ces opérations sont faites uniquement en combinant des opérations de lecture d'un fichier sonore. Lecture simple contrôlée en sens et vitesse, déplacement de boucles mobiles comportant plusieurs curseurs de lecture. - Exploration directe de la forme d'onde à différentes échelles - Édition et Montage virtuel

Screenshots

auGEN X3 screens
GRM studio3 screens

Verdict

The call

The clearest difference is price: GRM studio at Free against auGEN X's $9.99. GRM studio also leads on update cadence (weekly vs every 3 months) and review sentiment (100% vs 86%). auGEN X's advantage is rating (4.6 vs 4.0) and ratings volume (12 vs 1). On ads, in-app purchases, device support and iOS requirement 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

GRM studio is free to download; auGEN X costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

auGEN X holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: auGEN X has 12 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 86% of auGEN X's written reviews are positive against 100% of GRM studio's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

auGEN X ships an update every 3 months, GRM studio weekly. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
auGEN X versus GRM studio: the parameters behind the verdict, then further details
ParameterauGEN XGRM studio
Price$9.99Free — better
Rating4.6 (12 ratings) — better4.0 (1 ratings)
Positive reviews85.7% of reviews100.0% of reviews — better
Number of ratings12 — better1
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better9.3
Further details — not scored
Size57 MB35 MB
Age rating4+4+
DeveloperauDSPrInstitut National de l'Audiovisuel

Customer experience

auGEN X

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews7 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

GRM studio

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

auGEN X

No in-app purchases

None

GRM studio

No in-app purchases

Questions

Is auGEN X free?
auGEN X costs $9.99, with no in-app purchases.
Is GRM studio free?
GRM studio is free to download, with no in-app purchases.
Which has better reviews, auGEN X or GRM studio?
auGEN X is rated higher. auGEN X averages 4.6 out of 5 from 12 ratings, while GRM studio averages 4.0 from 1 ratings.
Do auGEN X or GRM studio have ads?
Neither auGEN X nor GRM studio shows ads.
Which is updated more often, auGEN X or GRM studio?
auGEN X ships an update every 3 months, and GRM studio weekly. Most recently, auGEN X was updated on October 1, 2026 and GRM studio on October 2, 2026.

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