Comparison

SynthBridge MIDI Synth vs DX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

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.

Highlights
  • Hardware-style UI
  • Curated presets
  • Kaoss Physics-style filter pad
  • Essential FX (Chorus, Delay, Reverb)
  • Mini-keyboard
  • Dual-language support
Features
Read full description

◆ 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

SynthBridge MIDI Synth4 screens
DX1 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

Scorecard5 real differences · 5 level
SynthBridge MIDI Synth versus DX: the parameters behind the verdict, then further details
ParameterSynthBridge MIDI SynthDX
PriceFreeFree
Rating4.8 (4 ratings) — better2.0 (2 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings4 — better2
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.5
Further details — not scored
Size76 MB86 MB
Age rating+44+
Developer啟东 徐Kouki Yoshimoto

Customer experience

SynthBridge MIDI Synth

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

DX

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

In-app purchases

7 purchases

SynthBridge MIDI Synth

Subscriptions2
  • Cloud Monthly7 Days trial$1.991 Month
  • Cloud Yearly7 Days trial$12.991 Year
One-time5
  • Supporter Tip$0.99
  • Remove Ads$1.99
  • Supporter Plus$4.99
Show 2 more
  • SynthBridge Pro$4.99
  • Supporter Patron$9.99
None

DX

No in-app purchases

Questions

Is SynthBridge MIDI Synth free?
SynthBridge MIDI Synth is free to download, with in-app purchases available.
Is DX free?
DX is free to download, with no in-app purchases.
Which has better reviews, SynthBridge MIDI Synth or DX?
SynthBridge MIDI Synth is rated higher. SynthBridge MIDI Synth averages 4.8 out of 5 from 4 ratings, while DX averages 2.0 from 2 ratings.
Do SynthBridge MIDI Synth or DX have ads?
Neither SynthBridge MIDI Synth nor DX shows ads.
Which is updated more often, SynthBridge MIDI Synth or DX?
SynthBridge MIDI Synth ships an update every 2 weeks, and DX every 2 weeks. Most recently, SynthBridge MIDI Synth was updated on October 25, 2026 and DX on October 19, 2026.

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