Comparison

iFretless Guitar vs D550 MIDI Controller

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

Head to head
About

iFretless Guitar

This app offers a unique, touch-optimized guitar fretboard for iOS devices. It allows for expressive, one-touch note playing with real-time pitch control, enabling fast melodies, scales, and arpeggios. It's a powerful new instrument for making music, not just a simulation.

Highlights
  • One-touch-per-note design
  • Real-time pitch control
  • Audio unit support
  • Fretless note bending
  • Velocity sensitive instruments
  • MIDI input and output
  • Built-in reverb and EQ
Features
Read full description

iFretless is a guitar fretboard re-designed for maximum playability on iOS devices. It replaces two handed playing and strumming with a one-touch-per-note design that enables fast, precise playing of melodies, scales, and arpeggios and real-time control over the pitch of each individual note. iFretless is not an imitation guitar for your iPhone; it's a powerful new way to make music. FEATURES 1) Audio unit support allows you to connect to a software effects chain or record directly in DAW apps 2) Fretless note bending 3) Velocity sensitive multi-sampled instruments 4) 10 different velocity sensitive guitar sounds 5) MIDI input and output 6) built-in reverb and Eq Sounds: 1) Nylon String Folk 2) Picked Steel String 3) Grunge Telecaster 4) Snarling Synth 5) Bridge-Mid Pickup Bright Strat 6) Blues Neck Pickup Strat 7) Hollow Body Electric 8) Classical 9) Clean bridge pickup 10) Clean neck pickup

About

D550 MIDI Controller

This app simulates a hammered dulcimer as a MIDI controller for iPad. It allows users to play virtual instruments and hardware synthesizers without producing sound itself. Customize transpose, MIDI channels, velocity, and drag roll sensitivity for a unique musical experience.

Highlights
  • Hammered dulcimer simulation
  • MIDI control surface
  • Transpose up/down one octave
  • Adjustable drag roll sensitivity
  • Independent MIDI channel control
  • Velocity and volume adjustment
  • Virtual MIDI port support
Read full description

D550 MIDI is a Hammered Dulcimer based MIDI control surface for the iPad. The app doesn't produce any sound on it own. It is designed for playing hardware and software VST-style MIDI synthesizers such as Kontakt via a CoreMIDI compatible interface connected to the dock connector or virtual MIDI instruments like Roland Sound Canvas for iOS, IK Multimedia SampleTank®, or Sonosaurus ThumbJam running on your iPad. The app preview shows the app controlling Hammered Dulcimer, Harp, and Cittern MIDI patches in Sonosaurus ThumbJam. The app has the full 3.75 octave chromatic range of the flagship Dusty Strings D550 Chromatic Hammered Dulcimer, plus can be transposed up or down one octave in semitone increments. To play, just touch the strings on either side of the left (Treble) bridge or the left side of the right (Bass) bridge just like on the real instrument. To get repeated note "drag roll" effects, drag quickly horizontally across the strings. The drag roll sensitivity can be set on the settings screen. The higher the sensitivity, the shorter distance you need to move your finger to get the effect. Touch the iPad icon on the playing area controls to toggle between "Full" and "Treble/Bass Bridge Only" style instruments. "Full" provides the full D550 instrument including the Superbass bridge. "Treble/Bass-Only" focuses on the treble and bass bridges and provides the maximum string spacing for easier play on smaller screens like the iPad Mini. Touch the MIDI connector icon on the upper left corner to show the settings screen where you may: - Set the overall instrument transpose up or down up to one octave in semitone increments - Set the MIDI channel independently for the treble and bass bridges The treble bridge notes include the C#6 and D#6 notes on the accessory bridge at the top left of the instrument and the D#5 on the accessory bridge above the bass bridge. The bass bridge notes include the notes on the Super bridge on the left side of the full instrument layout. - Adjust the MIDI velocity and volume independently for the treble and bass bridges - Use the "Transmit MIDI Port" switch to choose between "Omni" sending MIDI data to all CoreMIDI apps or "Virtual Port" sending to a named CoreMIDI virtual output port. When the "Virtual Port option is selected, D550 MIDI will show up as an input option labeled "D550" in apps that support virtual ports like Sonosaurus ThumbJam and MIDIBridge. "Omni" mode is selected by default. - Show or hide the hammer touches + note label highlights - Enable or disable the drag rolls as well as set the sensitivity for how far you need to drag to get the roll effect - Visit the AppCordions website - Visit the Dusty Strings website Touch the "?" on the upper left corner to show the note names for the strings. Touch the "Shhh" button on the upper right corner of the main screen or on the settings screen to send a MIDI "All Notes Off" message to quiet any stuck notes. The app works most effectively with MIDI patches that have a long release decay time, like harp, guitar, and other plucked instruments. Settings for use with other MIDI synthesizer apps: Sonosaurus ThumbJam: - In "Preferences", under "Options", enabled "Background Audio". If using the "Virtual Port" transmit port option, enable the input port under Preferences / MIDI Control / MIDI Input Connections. Under Preferences / MIDI Control / Input Options, change the "In Channel Start" from "Omni" to channel 1. IK Multimedia SampleTank: - In Settings (touch the gear icon), enable "Background Audio". Other CoreMIDI compatible synth apps will have similar settings. IK Multimedia iRig MIDI Hardware Interface: - For simple direct connection, in D550 MIDI, set the "Transmit MIDI Port" option to "Omni" . - If using a MIDI filtering app like MIDIBridge to modify the data stream, in D550MIDI, set the "Transmit MIDI Port" option to "Virtual Port". Please visit the app website for demo and setup tutorial videos.

Screenshots

iFretless Guitar4 screens

Verdict

The call

The clearest difference is review sentiment: D550 MIDI Controller at 80% against iFretless Guitar's 55%. D550 MIDI Controller also leads on update cadence (fortnightly vs every 2 months). iFretless Guitar's advantage is device support (3 vs 1). On price, ads, in-app purchases and monetization model 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

iFretless Guitar costs $9.99 and D550 MIDI Controller $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

iFretless Guitar ships an update every 2 months, D550 MIDI Controller fortnightly. The most recent releases landed on September 26, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
iFretless Guitar versus D550 MIDI Controller: the parameters behind the verdict, then further details
ParameteriFretless GuitarD550 MIDI Controller
Price$9.99$9.99
Rating4.2 (29 ratings) — better—
Positive reviews54.5% of reviews80.0% of reviews — better
Number of ratings29 — better—
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS15.6 — better16.6
Further details — not scored
Size201 MB67 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedMichael Eskin

Customer experience

iFretless Guitar

All ratings29 ratings
Positive79.3%
Neutral3.4%
Negative17.2%
Written reviews66 reviews
Positive54.5%
Neutral12.1%
Negative33.3%

D550 MIDI Controller

Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

iFretless Guitar

No in-app purchases

None

D550 MIDI Controller

No in-app purchases

Questions

Is iFretless Guitar free?
iFretless Guitar costs $9.99, with no in-app purchases.
Is D550 MIDI Controller free?
D550 MIDI Controller costs $9.99, with no in-app purchases.
Do iFretless Guitar or D550 MIDI Controller have ads?
Neither iFretless Guitar nor D550 MIDI Controller shows ads.
Which is updated more often, iFretless Guitar or D550 MIDI Controller?
iFretless Guitar ships an update every 2 months, and D550 MIDI Controller fortnightly. Most recently, iFretless Guitar was updated on September 26, 2026 and D550 MIDI Controller on September 29, 2026.

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