RK vs NinetyPhaser
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
RK
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The RK-601 can convert tempo from gate pulses into MIDI clock so you can synchronise your music software to devices using a simple metronome output. In the RK-601 companion app you can set clock dividers, button response and MIDI start/stop message behaviour. The RK601 needs the Apple CCK on iOS devices with lighting connectors.
NinetyPhaser
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NinetyPhaser is a four-stage analog-style phaser for iPhone and iPad. Use it as a standalone audio app or insert the included AUv3 effect in a compatible host such as GarageBand. A four-stage all-pass network creates focused notches and rounded movement, while input conditioning, nonlinear stages, and a modeled output path add responsive character. Choose a smoother open response or a deeper mode with stronger feedback. FEATURES - Four-stage all-pass phaser - Two circuit-response modes - Speed range from 0.05 to 12 Hz - Equal-power Mix control - Stereo Spread with offset modulation - Instrument and line input modes - Mono-to-mono, mono-to-stereo, and stereo-to-stereo routing - Standalone iOS/iPadOS app - AUv3 audio effect for compatible hosts TRY BEFORE UNLOCKING The app provides 10 minutes of full-featured active use, shared between the standalone app and AUv3 extension. Demo time advances only while audio is actively processing. A one-time, non-consumable In-App Purchase unlocks unlimited use in both formats. Restore Purchases is available in the standalone app. NinetyPhaser works on electric piano, pads, synthesizers, guitar, bass, and other sources that benefit from subtle motion or a pronounced sweep.
Screenshots
Verdict
The clearest difference is in-app purchases: RK at none against NinetyPhaser's 1. RK also leads on iOS requirement (13.2 vs 16.0). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. NinetyPhaser sells 1 one-off in-app purchase. RK asks for nothing beyond the download.
| Parameter | RK | NinetyPhaser |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 13.2 โ better | 16.0 |
| Further details โ not scored | ||
| Size | 1 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Gerrit Dijkstra | Shoma Kondo |
In-app purchases
RK
No in-app purchases
NinetyPhaser
- NinetyPhaser Full Version$6.99








