SynthBridge MIDI Synth vs DX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SynthBridge MIDI Synth
Transform your device into a versatile MIDI sound module and virtual piano. Load SoundFont files, connect controllers, and utilize expressive performance tools for practice, production, or live music.
- MIDI controller support (Bluetooth, USB, Network)
- SoundFont (SF2/SF3) loading and playback
- Multi-touch piano keyboard and drum pads
- Pitch bend and modulation wheels
- MIDI file playback and recording
- Customizable velocity curves
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Connect your MIDI keyboard, choose a sound, and play. SynthBridge turns your phone or tablet into a portable sound module and practice workspace. You can also start with the on-screen piano and drum pads. Your sounds: use the built-in library or import SF2/SF3 SoundFonts. Layer sounds and adjust their balance, effects and keyboard ranges. Your keyboard: connect compatible USB MIDI or Bluetooth MIDI devices. Control supported parameters with MIDI CC messages. Your practice: play MIDI files, follow the note visualization, and combine a metronome, loops and Style accompaniment. Your ideas: record MIDI performances, keep named drafts, preview takes and export MIDI files. MIDI files can also be converted to WAV or AAC audio. Your setup: save performance scenes and return to your sounds and playing settings. Use portrait or landscape layouts on phones and tablets. Some features and resources require in-app purchases. iOS or iPadOS 15.0 or later. USB and Bluetooth MIDI require compatible devices and accessories. https://synth.64bit.us/privacy.html https://synth.64bit.us/terms.html
DX
Create and manipulate 80s FM synth sounds with a tactile hardware-style interface. Explore curated presets, use a Kaoss Physics-style filter pad for expressive control, and add essential effects. Ideal for music production or on-the-go sound design.
- Hardware-style UI
- Curated presets
- Kaoss Physics-style filter pad
- Essential FX (Chorus, Delay, Reverb)
- Mini-keyboard
- Dual-language support
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◆ Key Features Tactile Hardware-Style UI: Interactive visual feedback for operators, envelopes, and algorithms. Curated Presets: Essential sounds including E. PIANO, SYNTH BASS, and BRASS. Kaoss Physics-style Filter Pad: Smooth X/Y control over Cutoff and Resonance. Essential FX: PITCH/MOD, and spatial effects including CHORUS, DELAY, and REVERB. Comfortable Playability: Sleek mini-keyboard with adjustable key range. Dual-Language Support: Fully localized in English and Japanese. Perfect as a secondary sound source for music production, or for sound design on the go. Experience the iconic digital synth sounds of yesteryear right now on your iPhone. Note: This app is a sample-based vintage synthesizer (not a real-time 6-operator FM synthesis engine). We recommend playing this app on an actual physical device (not via simulator).
Screenshots
Verdict
The clearest difference is review sentiment: SynthBridge MIDI Synth at 100% against DX's 0%. SynthBridge MIDI Synth also leads on rating (4.8 vs 2.0) and iOS requirement (15.0 vs 26.5). DX's advantage is in-app purchases (none vs 7). On price, ratings volume, update cadence and ads 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. SynthBridge MIDI Synth sells 7 in-app purchases, starting at $1.99 per month. DX asks for nothing beyond the download.
SynthBridge MIDI Synth holds the better App Store score, 4.8 against 2.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 100% of SynthBridge MIDI Synth's written reviews are positive against 0% of DX's.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.
| Parameter | SynthBridge MIDI Synth | DX |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | 2.0 (2 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 4 — better | 2 |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 76 MB | 86 MB |
| Age rating | +4 | 4+ |
| Developer | 啟东 徐 | Kouki Yoshimoto |
Customer experience
SynthBridge MIDI Synth
DX
In-app purchases
SynthBridge MIDI Synth
- Cloud Monthly7 Days trial$1.991 Month
- Cloud Yearly7 Days trial$12.991 Year
- Supporter Tip$0.99
- Remove Ads$1.99
- Supporter Plus$4.99
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- SynthBridge Pro$4.99
- Supporter Patron$9.99
DX
No in-app purchases








