OTOKAI vs RasterFX
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
OTOKAI
This app transforms music listening into an engaging brain activity. Create unique music-photo or music-video combinations and share them with friends and family in a private social network. It's designed to promote cognitive health through enjoyable musical experiences.
- AI-powered music generation
- Combine music with photos/videos
- Private social network for sharing
- Cognitive function exercises
- Music analysis and comparison
- Daily brain health routine
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OTOKAI is an app designed to help you keep both your mind and brain active by enjoying music, using your brain, and staying connected with family and friends. Rather than simply listening to music, OTOKAI encourages you to compare different tracks, make choices, and put what you feel into words. You can also combine music with photos or videos to create your own works. Through the music you enjoy, OTOKAI helps you build a natural habit of using your brain. OTOKAI also includes a closed social network where you can share your creations and thoughts with family and friends. In a safe and private environment, you can stay connected with the people who matter to you and enjoy conversations and shared experiences. Social interaction can support not only emotional well-being, but also the maintenance of cognitive function. The music featured in OTOKAI uses MusicTGA, Amadeus Codeβs proprietary technology developed through years of research into the structural patterns of hit songs. By providing a music experience that naturally makes you want to keep listening, OTOKAI supports brain activity while making the experience enjoyable. OTOKAI is designed as a daily brain health habit aimed at helping maintain cognitive function. In our first pilot study, continued participation was associated with improvements in frontal lobe function among older adults. https://otokai.jp/en/specialist/ Music for a healthier mind and brain. Start your daily brain health routine with OTOKAI.
RasterFX
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Make any sound move. RasterFX is a playable modular multi-effects processor for iPhone and iPad. Use it standalone with a microphone, an imported audio file or built-in signals β or load it as an AUv3 audio effect in AUM, GarageBand, Logic Pro for iPad, Loopy Pro, Cubasis and other Audio Unit hosts. BUILD YOUR EFFECT CHAIN Choose from Filter, Delay, Drive, Reverb, Grain, Repeat, Motion and Dynamics. Arrange up to six plates in series or split them into parallel A/B paths. Reorder the chain and the sound changes with it. MODULATE ANY CONTROL Patch LFOs, envelope followers, random and chaos sources, step sequencers, MIDI, macros, the XY pad or device tilt to any control. Create up to 16 modulation lines, with live arcs showing exactly how the sound is moving. PERFORM THE PATCH Morph between four snapshots on the XY pad. Turn eight macros. Hold four momentary throws for stutter, sweep, reverse and freeze. RasterFX is built to be played with one hand, not programmed and left alone. GENERATE, LOCK, EVOLVE Nudge a patch, reshape it or roll a new one. Lock the parts you want to keep, undo any result and save the seeds worth returning to. Evolve lets the patch drift over time while staying anchored to the sound you chose. SEE WHAT YOU HEAR Every effect has its own live visualizer. The CRT and halftone interface makes filters, delay taps, grains, dynamics and modulation visible without turning the screen into a wall of meters. RECORD THE RESULT Record the processed output to WAV, rename takes and share them from the app. FREE TO START. PRO ONCE. Free includes all eight effects, all modulation sources, every factory preset, three plates, four modulation lines and 60-second recordings. No ads, account, watermark or reduced audio quality. RasterFX Pro is a one-time purchase β not a subscription. It unlocks six plates, 16 modulation lines, split routing, XY snapshot morphing, Evolve, A/B compare, unlimited recording length and your own saved presets. Your saved sound always plays back exactly as created, even if it uses Pro features; Free limits editing, never playback. Made for headphones, late at night.
Screenshots
Verdict
The clearest difference is in-app purchases: OTOKAI at none against RasterFX's 1. OTOKAI also leads on iOS requirement (15.5 vs 17.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. RasterFX sells 1 one-off in-app purchase. OTOKAI asks for nothing beyond the download.
| Parameter | OTOKAI | RasterFX |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | β |
| Update frequency | Weekly | β |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Monetization | Free | β |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.5 β better | 17.0 |
| Further details β not scored | ||
| Size | 93 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Amadeus Code Inc. | Chih Han Lin |
In-app purchases
OTOKAI
No in-app purchases
RasterFX
- RasterFX Pro$3.99









