FrequencyCat vs Graphony
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FrequencyCat
Transform your photos into unique sound art using advanced image-to-sound technology. Explore, enjoy, and share your creative audio-visual pieces. Embrace your inner artist and discover the unexpected.
- Morph images into sound art
- Create spectrogram oddities
- Share sound art creations
- Unique audio-visual experience
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Hide an image inside sound. FrequencyCat is a playful tool for exploring the connection between images, sound, and spectrograms. Choose an image, and FrequencyCat transforms it into a unique audio signal. Play the sound and view its spectrogram, and you’ll see the original image emerge again from the frequencies. With FrequencyCat, you can: - Turn images into sound - View audio spectrograms in real time - Play sounds and reveal the images hidden inside them - Explore how different images create different sounds - Discover the relationship between sound, frequency, and Fourier transforms in an intuitive way There’s no magic behind it. Just frequencies, phases, an inverse Fourier transform, and a little curiosity about sound. Whether you’re interested in acoustics, music, signal processing, or simply wondering what an image might sound like, FrequencyCat gives you a new way to explore. Pick an image. Hear what it sounds like.
Graphony
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Graphony is a composition environment for academic and experimental composers. Rather than entering notes one at a time, you design a piece from the top down by drawing graphs of its musical parameters, then export a MusicXML score to complete in your notation software and render an audio version using sounds you record yourself. JUMPSTART A COMPOSITION WITH GRAPHS Set the length, meter, and tempo, then draw a curve over time for each parameter: - Pitch content (register and range) - Event duration - Density (how many events sound at once) - Dynamics - Connectivity, motivic patterns, and the amount of pitch-altering effects The graphs are the generative blueprint of the piece. Reshape a curve and the material follows, so you can audition many versions of an idea in minutes. Reference curves from your other parameters are shown underneath, keeping every decision in context. EXPORT A MUSICXML SCORE Graphony writes a clean MusicXML file you can open in Sibelius, Dorico, Finale, or MuseScore, then edit and complete by hand. The score is a point of departure, not a finished product: it is fully yours to refine and notate. HEAR IT WITH YOUR OWN SOUNDS Record short sound samples, label them, and Graphony renders an audio version of the piece using those recordings. Each sound carries its own reference pitch, dynamics, articulation, and effects, so the realization reflects your own sonic material rather than a generic synthesizer. FOR EXPERIMENTAL PRACTICE - Absolute pitch contour: the pitch graph maps to a real concert-pitch register, so the notation means what it says. - Microtonal quarter-tones, chromatic-stepped glissandi, and detected chords notated on a single stem. - A palette of per-sound effects: glissando, scratch, harmonic distortion, reverse, inverted pitch, and granular fragment. - "Notate as C" writes a sound's notes on a single placeholder middle C, so you can set their pitches by hand later. - Sound roles (sustainer, punctuator, doubler, texture) are distinguished by notehead. PRIVATE BY DESIGN Everything stays on your device. Graphony has no accounts, no ads, and collects no data. Your graphs, recordings, scores, and audio never leave your iPhone or iPad unless you choose to share them. Graphony is built to get an experimental idea out of your head and onto the page quickly: design it as graphs, hear it in your own sounds, and carry the score into your notation software to finish.
Screenshots
Verdict
The clearest difference is update cadence: Graphony at every 5 days against FrequencyCat's every 40 months. Graphony also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
FrequencyCat ships an update every 40 months, Graphony every 5 days. The most recent releases landed on September 4, 2026 and September 23, 2026 respectively.
| Parameter | FrequencyCat | Graphony |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 40 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Xuesong Zhang | Leonid Iogansen |
In-app purchases
FrequencyCat
No in-app purchases
Graphony
No in-app purchases









