EwiFinger vs RX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EwiFinger
This app simulates the fingering of an electronic wind instrument (EWI). It allows users to see the correct key combinations for different notes. Ideal for learning and practicing EWI fingerings.
- EWI fingering simulation
- Note display from key combinations
- AKAI EWI reproduction
- Practice tool for wind instrument players
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It is a simple fingering simulator that reproduces the wind instrument EWI of AKAI Professional. You can check the notes from the key switch combination.
RX
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Play the wind synth you know with a whole new set of sounds. Warm woodwind tones for a soft ballad, bright synth leads for a bold solo. RX-79 is a breath synthesizer that turns your wind controller and iPhone or iPad into a full sound module. Saxophonist SJsax shaped every sound and every response by actually playing it. [Find the right sound for every song] 41 built-in sounds. 14 acoustic sounds including soprano, alto and baritone sax, clarinet, oboe, flute, trumpet, euphonium and harmonica, and 27 electric sounds including brass, leads and basses. Play the same melody in many different moods. Tap the preview button in the sound list to hear a sound even without a controller. [Fit it to your breath] Adjust breath sensitivity, response curve, attack and decay, and set breath noise, tonguing and note-to-note connection to match your playing style. [Make it your own] Shape each sound with brightness, resonance, drive, vibrato, delay and reverb. Save the settings you like to the USER list and give them names. Saved sounds stay on this device. [SJ PACK: 10 signature sounds, sold separately] Extra sounds that carry SJsax's playing feel. Before buying, you can play each sound yourself for 30 seconds. Note: SJ PACK is an in-app purchase sold separately from the app (one-time purchase). [Connection] Connect a USB MIDI wind controller. RX-79 responds to breath (CC2, CC11, aftertouch), pitch bend and vibrato (CC1). Depending on the ports and power needs of your controller and iPhone or iPad, you may need a separate cable or adapter, such as a USB camera adapter. Sound plays even with the silent switch on, and you can play along with backing tracks from other apps. No internet connection required. No personal data is collected. Connection and support https://sjsax.com/rx79/
Screenshots
Verdict
The clearest difference is price: EwiFinger at Free against RX's $9.99. EwiFinger also leads on in-app purchases (none vs 1). RX's advantage is ads (none vs shown) and update cadence (weekly vs monthly). On 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
EwiFinger is free to download; RX costs $9.99 up front. RX sells 1 one-off in-app purchase. EwiFinger asks for nothing beyond the download.
EwiFinger ships an update monthly, RX weekly. The most recent releases landed on October 6, 2026 and October 29, 2026 respectively.
| Parameter | EwiFinger | RX |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Monthly | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | kazunori hirokawa | sung ju KIM |
In-app purchases
EwiFinger
No in-app purchases
RX
- SJ PACK$5.99








