Comparison

Trapezoid vs Simple Accordion

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

Head to head
About

Trapezoid

This virtual instrument accurately simulates the sound and playability of a hammered dulcimer. It offers multiple tuning options, drag roll effects, and MIDI compatibility for a realistic musical experience. Designed for both beginners and experienced players, it fits right in your pocket.

Highlights
  • Authentic hammered dulcimer sound
  • Standard and Michigan tunings
  • Drag roll effects
  • MIDI keyboard compatibility
  • Velocity sensitive MIDI input
  • Note name display
Features
Currently charting
Read full description

Trapezoid is an amazing Hammered Dulcimer that can fit in your pocket. Written by an experienced Hammered Dulcimer player, this virtual dulcimer sounds and plays like the real thing! This app has the full range of a standard 12/11 style (9/9 style for 4:3 format iPads) instrument and supports both Standard and Michigan (octave) tunings. 12/11 means there are 12 bridges on the Treble (left) side of the instrument, 11 bridges on the Bass (right) side of the instrument. 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 sensitivity of the drag effect may be set on the settings screen. Touch the "?" to show the note names for the strings. Touch the "S" or "M" below the "?" to toggle between Standard and Michigan (octave) tuning. Touch the "Shhh" icon on the upper right corner to quiet all the strings. Touch the "i" to bring up the settings screen where you can set the overall volume, enable or disable the drag roll feature, and set the roll sensitivity for how far you need to drag to get the roll effect. The app also may be played from a MIDI keyboard connected to a hardware MIDI interface or other MIDI controller or MIDI file player apps. On the settings page you may select the MIDI channel number. When playing via MIDI, the app is velocity sensitive based on the velocity sent with the Note-on events. Lowest note is A2 (MIDI note 45). Range is full chromatic from A2 through D6. The app will respond to MIDI volume messages on the selected MIDI channel. To truly experience the full stereo spread of the instrument, plug in a set of headphones or amplified speakers. Playing Hint for Smaller Phone Users: On the smaller screen phones the strings are pretty close together. If you are having trouble hitting the notes you want, show the note names by touching the "?" and then, when playing touch directly on the note names for best playing accuracy. Audio samples of Wes Chappell's amazing dulcimer provided by Jesse Chappell from ThumbJam.com. The instrument was built by James Jones, from Bedford, VA. I have played and taught the Hammered Dulcimer for over 20 years. This app sounds and plays as close to the real instrument as I'm capable of doing on a touch screen. Be sure to visit the AppCordions.com website to watch the demo videos!

About

Simple Accordion

Experience the accordion on your mobile device with authentic sound sets and practice tools. Explore different musical styles, play along with songs, and record your performances.

Highlights
  • Authentic accordion sound sets
  • MIDI playback with visual guide
  • Built-in songs for practice
  • Rhythm accompaniment
  • Performance recording and management
Features
Read full description

Bring the expressive sound of the accordion to your iPhone and iPad. Simple Accordion is a modern accordion simulator designed for practice, creativity, and musical exploration — featuring three authentic sound sets, songs, rhythms, MIDI playback, and an easy recording system. MULTIPLE ACCORDION SOUNDS Choose between Classic Accordion for traditional styles, Tango Bandoneon for expressive tango music, and Church Reed Organ for rich, sustained tones. Switch sounds instantly to suit different genres. SONGS + MIDI PRACTICE Practice with built-in songs, follow MIDI playback using a falling-note style visual guide, and adjust playback speed to match your learning pace. RHYTHMS & GROOVES Add rhythm accompaniment to improve timing and make practice sessions more engaging. MANAGE YOUR RECORDINGS Record your accordion performances, replay them anytime, and keep all your recordings neatly organized in one place. If you’re looking for a portable accordion app for folk, tango, worship, or creative music making, Simple Accordion keeps your music flowing wherever you are.

Screenshots

Trapezoid3 screens
Simple Accordion4 screens

Verdict

The call

The clearest difference is price: Simple Accordion at Free against Trapezoid's $1.99. Simple Accordion also leads on ratings volume (12 vs 2). Trapezoid's advantage is rating (5.0 vs 3.5) and in-app purchases (none vs 1). 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

CostPrice · In-app purchases · Ads · Monetization

Simple Accordion is free to download; Trapezoid costs $1.99 up front. Simple Accordion sells 1 one-off in-app purchase. Trapezoid asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Trapezoid holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: Simple Accordion has 12 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Trapezoid ships an update every 9 days, Simple Accordion every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard9 real differences · 2 level
Trapezoid versus Simple Accordion: the parameters behind the verdict, then further details
ParameterTrapezoidSimple Accordion
Price$1.99Free — better
Rating5.0 (2 ratings) — better3.5 (12 ratings)
Positive reviews100.0% of reviews—
Number of ratings212 — better
Update frequencyEvery 9 days — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#191 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS10.0 — better13.0
Further details — not scored
Size46 MB130 MB
Age rating4+4+
DeveloperMichael EskinMustafa Demir

In-app purchases

None

Trapezoid

No in-app purchases

1 purchases

Simple Accordion

One-time1
  • Get Premium$5.99

Questions

Is Trapezoid free?
Trapezoid costs $1.99, with no in-app purchases.
Is Simple Accordion free?
Simple Accordion is free to download, with in-app purchases available.
Which has better reviews, Trapezoid or Simple Accordion?
Trapezoid is rated higher. Trapezoid averages 5.0 out of 5 from 2 ratings, while Simple Accordion averages 3.5 from 12 ratings.
Do Trapezoid or Simple Accordion have ads?
Simple Accordion shows ads; Trapezoid does not.
Which is updated more often, Trapezoid or Simple Accordion?
Trapezoid ships an update every 9 days, and Simple Accordion every 3 weeks. Most recently, Trapezoid was updated on October 24, 2026 and Simple Accordion on October 25, 2026.

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