Percussions vs Rotary Mod
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Percussions
This app provides a virtual percussion instrument experience with 18 high-quality sounds. Play instruments by tapping, shaking, or rolling your device, and customize your setup for quick access. Integrate your music library to play along with your favorite tunes.
- 18 virtual percussion instruments
- Multiple playing methods (tap, shake, roll)
- Customizable tab bar for quick instrument switching
- iPod music playback integration
- Low latency and high-quality sound
- Reverb effect
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"Percussions" is, as its name suggests, a new virtual musical instrument application which offers the performance of 18 kinds of percussion instruments in high sound quality. As well as actual percussion instruments, everyone can play each sound by various methods as follows: Tapping the screen, shaking the device, rolling the device, ... Moreover, favorite percussion instruments can be allocated to tabs in the tab bar and switched instantaneously. Also you can play percussion part of your favorite tunes with iPod music playback. A lot of unusual percussion instruments without seeing are included in this application. But those sounds might have been heard many times. Let's liven up your music party by the sound of this application. [Features] -Including 18 percussion instruments Agogo, Bell Tree, Bongo, Castanet, Claves, Conga, Cowbell, Cuica, Guiro, Maracas, Matraca, Scratch (Turn Table), Shaker, Tambourine, Timbales, Triangle, Vibraslap, Wood Block -Various perform methods in answer to actual instrument Tapping the screen: Bongo, Castanet, etc. Rubbing the screen: Guiro, Cuica, Scratch, Matraca, etc. Pressing down the screen (for playing muted sound): Conga (High), Triangle, etc. Swinging the device downward: Cowbell, Timbales, etc. Shaking the device: Shaker, Maracas, etc. -Low latency and real output sound by internal software synthesizer Reverb effect Note; Please set animation off on the setting view when feeling that the response is not quick because of the model etc.
Rotary Mod
This app emulates a Leslie speaker, creating a pulsing vibrato effect for instruments and vocals. It offers precise control over rotor and horn speeds, cabinet size, and includes advanced features like frequency modulation and a unique Ribbon control for simultaneous parameter adjustments.
- Independent rotor and horn speed control
- Frequency modulation with secondary LFO
- Selectable cabinet size (Standard/Giant)
- Hicut control for tone shaping
- Tap Tempo for BPM sync
- Innovative Ribbon control
- Mix Lock for preset scrolling
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Rotary is a rotating cabinet effect that simulates a Leslie speaker. It produces a pulse-like vibrato effect depending on the speed of rotation. Rotary offers precise control to dial in the exact amount of movement you need. This classic, swirly effect has been used on countless hit records to drastically transform guitars, bass, synths and even vocals. Features: - Change the speed of the rotor and horn independently and adjust the mix of the two to produce pulsing effects and special vibratos. - Add frequency modulation to the rotor and horn speed using secondary LFO with selectable modulation source. - Choose cabinet size (Standard or Giant) to alter the sweetness of your tone. - Craft the exact sound you need with included Hicut control. - Use Tap Tempo to sync effect to the BPM of your song. - Incredibly easy to use with included presets. - Innovative Ribbon control allows for changing any combination of parameters simultaneously. - Use Mix Lock to scroll through presets while keeping the wet-dry mix constant. - Available as an Audio Units AUv3 plug-in and Standalone app.
Screenshots
Verdict
The clearest difference is review sentiment: Rotary Mod at 80% against Percussions's 23%. Rotary Mod also leads on rating (4.3 vs 3.0) and update cadence (every 3 months vs every 17 months). Percussions's advantage is price ($2.99 vs $7.99) and chart position (#172 vs unranked). On ads, in-app purchases, monetization model 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
Percussions costs $2.99 and Rotary Mod $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Rotary Mod holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Rotary Mod has 23 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 23% of Percussions's written reviews are positive against 80% of Rotary Mod's.
Percussions ships an update every 17 months, Rotary Mod every 3 months. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.
| Parameter | Percussions | Rotary Mod |
|---|---|---|
| Price | $2.99 — better | $7.99 |
| Rating | 3.0 (3 ratings) | 4.3 (23 ratings) — better |
| Positive reviews | 22.7% of reviews | 80.0% of reviews — better |
| Number of ratings | 3 | 23 — better |
| Update frequency | Every 17 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #172 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | CRIMSON TECHNOLOGY, Inc | Eventide |
Customer experience
Percussions
Rotary Mod
In-app purchases
Percussions
No in-app purchases
Rotary Mod
No in-app purchases









