Comparison

Harmonitron vs GSi Piano Studio

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

Head to head
About

Harmonitron

This app creates a rich, swirling harmonic tremolo effect, distinct from standard volume pulsing. It splits sound into low and high bands, modulating them in opposite phases for a lush, phaser-like character. Apply it to various instruments or full mixes as a standalone app or AUv3 effect.

Highlights
  • True harmonic tremolo with anti-phase modulation
  • Voice control for morphing between classic and harmonic tremolo
  • Split & Tilt for band crossover and balance
  • Tube Drive and tone shaping
  • Adjustable Rate and LFO Shapes
  • Tempo Sync with musical note divisions
  • Stereo Spread for auto-pan and width
Features
Read full description

Harmonitron is a harmonic tremolo. The rich, swirling amp "vibrato" made famous by early-1960s brownface amplifiers. A normal tremolo just pulses your volume up and down. A harmonic tremolo goes deeper: it splits your sound into a low band and a high band, then sweeps them in OPPOSITE phase. As the lows swell, the highs dip and back again. That contrary motion is what gives Harmonitron its lush, watery, almost phaser-like character that an ordinary tremolo can't reach. Turn the Voice control and the effect morphs smoothly from a classic in-phase tremolo all the way to a full harmonic swirl. Drop it on guitars, keys, synths, pads, drums, or a whole mix. Standalone, or as an Audio Unit (AUv3) effect inside GarageBand, AUM, Logic, and other hosts. THE SOUND • True harmonic tremolo: anti-phase modulation of a low and high band • Voice: morph continuously from classic tremolo to full harmonic swirl • Split & Tilt: place the crossover and balance the two bands • Tube Drive and tone shaping for warmth and grit MOVEMENT • Rate from a slow tide to a fast flutter, shown in BPM • LFO Shape: sine, triangle, square, and ramp with adjustable edge Slope • Tempo Sync that locks to your project and lands on the beat, with musical note divisions from 1/1 to 1/32 (dotted and triplet) • Stereo Spread for auto-pan and rotary-style width HANDS-ON • A living hero orb whose two halves breathe in opposite phase — drag it to set Depth, tap to bypass • Grouped, color-coded controls: Motion, Sync, Harmonic, Stereo, Drive, Output • Factory presets: Brownface, Rotary Swirl, Slow Tide, Sync Chop, Wide Harmonic and more — plus your own saved presets PLUGIN & STANDALONE • Full AUv3 audio-effect support with host presets and parameter automation • Runs on iPhone, iPad, and Mac • Standalone mode with a built-in demo pad, live microphone input, or import a song and export the processed result

About

GSi Piano Studio

This application uses advanced synthesis to recreate the sound of a grand piano. Users can customize various elements of the piano's mechanics to achieve unique sounds. It requires a physical MIDI keyboard for playback and is best suited for modern devices.

Highlights
  • Physical modeling sound generation
  • Full polyphony
  • Virtual sympathetic resonance
  • Customizable velocity curves
  • Session Recorder
  • AUv3 plugin support
Read full description

GSi Piano Studio is a software that recreates the sound of a gorgeous Grand Piano using Physical Modeling synthesis. INSTRUMENT BACKGROUND There are two ways to recreate the sound of a Grand Piano digitally: either using large sample sets, or using synthesis. As for the sample approach, GSi offers Genuine Sounds Vol. I that includes a wide variety of large sample sets directly recorded from actual acoustic instruments. Piano Studio, instead, recreates the sound using mostly digital synthesis techniques, by replicating the single elements that constitute the complex mechanic assembly of an actual piano: keys, hammers, strings, soundboard, enclosure, lid, etc. Some of these elements can also be modified via user parameters, such as the string dampening, detuning, sympathetic resonances, impact on the duplex-scale, hammer hardness and so on, so that the sound can be further refined or altered in order to obtain a different flavor of sound, or even something that goes beyond the natural sound of a Grand Piano. Main features - Full polyphony - Virtually unlimited dynamics - Long and natural decays - Supports real sympathetic resonance - Supports half-pedal and re-pedaling - 6 Ambience selections - 12 Virtual microphones - 9 Preamp types - Built-in limiter/compressor - 6-band visual equalizer with spectrum analyzer - Ping-Pong delay and Reverb - Customizable velocity curves - Session Recorder: records while you play, loads/saves SMF - Program manager with unlimited Programs - Available as Stand-alone App and AUv3 plugin - Low CPU load and RAM usage Please note: this App has no screen keyboard, you need to connect a physical MIDI keyboard to play. Also, you need a modern device, possibly iPad 9th gen or newer, iPhone 14 or newer. Older devices might not have enough CPU power for performing well at full polyphony.

Screenshots

Harmonitron2 screens
GSi Piano Studio4 screens

Verdict

The call

The clearest difference is price: Harmonitron at $2.99 against GSi Piano Studio's $19.99. On rating, ratings volume, ads and in-app purchases 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

Harmonitron costs $2.99 and GSi Piano Studio $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Harmonitron against 5.0 for GSi Piano Studio. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Scorecard1 real difference · 9 level
Harmonitron versus GSi Piano Studio: the parameters behind the verdict, then further details
ParameterHarmonitronGSi Piano Studio
Price$2.99 — better$19.99
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews—33.3% of reviews
Number of ratings2 — better1
Update frequency—Monthly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size3 MB99 MB
Age rating4+4+
DeveloperKonstantin Torsten SchutzGenuine Soundware

Customer experience

Harmonitron

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

GSi Piano Studio

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

In-app purchases

None

Harmonitron

No in-app purchases

None

GSi Piano Studio

No in-app purchases

Questions

Is Harmonitron free?
Harmonitron costs $2.99, with no in-app purchases.
Is GSi Piano Studio free?
GSi Piano Studio costs $19.99, with no in-app purchases.
Which has better reviews, Harmonitron or GSi Piano Studio?
Harmonitron and GSi Piano Studio are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Harmonitron or GSi Piano Studio have ads?
Neither Harmonitron nor GSi Piano Studio shows ads.

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