Arpie vs Synesthesia Synth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Arpie
This app transforms bouncing balls into a musical experience. Place balls of varying heights to create unique melodies and rhythms. It's an intuitive way for anyone to explore music creation.
- Bouncing ball music generation
- Adjustable ball height for melody
- Create musical sequences
- Intuitive music creation
- Variety of musical patterns
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Bouncing balls turn into music! Arpie is a novel musical app that allows anyone to enjoy music. Put balls as many as you like, them watch them playing a beautiful melody. Higher balls hit the keys with long pauses, and lower ones hit them fast and repeatedly. By combining them, you can easily create a wide variety of musical sequences.
Synesthesia Synth
An experimental audio-visual instrument that allows users to sculpt evolving spatial audio by manipulating floating capsules. Position, rotation, and pulse changes affect tone, texture, and synchronized particle generation. It's a visual synthesizer, not a game.
- Experimental audio-visual instrument
- Sculpt evolving spatial audio
- Manipulate floating capsules
- Control tone, texture, and particles
- Visual synthesizer
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Synthaestesia is a free experimental audio-visual instrument. Three capsules float in space. Every contraction produces sound. Move them, rotate them, reshape their pulse — and sculpt evolving spatial audio. Position changes tone. Rotation alters texture. Delay generates synchronized particles. This is not a game. It’s a spatial synth you can see.
Screenshots
Verdict
The clearest difference is rating: Synesthesia Synth at 5.0 against Arpie's 4.5. Synesthesia Synth also leads on update cadence (every 10 days vs every 97 months). Arpie's advantage is ratings volume (10 vs 2) and iOS requirement (11.0 vs 16.0). On price, ads, in-app purchases and monetization model 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.
Synesthesia Synth holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Arpie has 10 ratings behind it against 2, so its average is the more settled of the two.
Arpie ships an update every 97 months, Synesthesia Synth every 10 days. Both last shipped on October 19, 2026.
| Parameter | Arpie | Synesthesia Synth |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (10 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 92.5% of reviews | — |
| Number of ratings | 10 — better | 2 |
| Update frequency | Every 97 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 25 MB | 141 MB |
| Age rating | 4+ | 4+ |
| Developer | Keijiro Takahashi | MICHELE ZACCAGNINI |
In-app purchases
Arpie
No in-app purchases
Synesthesia Synth
No in-app purchases
