Comparison

Trapezoid vs Tune Library

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
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

Tune Library

Easily access and recall your entire music repertoire during practice or jam sessions. Quickly find tunes by rhythm, mode, key, or name, and get reminders on how they start.

Highlights
  • Import tunes from various sites
  • Organize by rhythm, mode, and key
  • Search tunes by name
  • Recall tune beginnings
  • Find tunes in specific tunings
Features
Read full description

Tune Library helps traditional musicians remember, organize, and practice the tunes they play. ORGANIZE YOUR REPERTOIRE • Create ordered Sets for sessions and performances. • Reorder, clone, and preview Sets. • Search and filter your tune library. RECORD AND PRACTICE • Attach multiple recordings to each tune. • Slow, trim, scrub, and loop difficult phrases. • Save practice sections for later. FIND AND PLAY TUNES • Identify tunes from recordings. • Import and play ABC notation. • Keep practicing offline.

Screenshots

Trapezoid3 screens
Tune Library4 screens

Verdict

The call

The clearest difference is rating: Trapezoid at 5.0 against Tune Library's 3.8. Trapezoid also leads on update cadence (every 9 days vs every 8 months) and price ($1.99 vs $2.99). On review sentiment, ratings volume, ads and in-app purchases 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

Trapezoid costs $1.99 and Tune Library $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Trapezoid holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Trapezoid ships an update every 9 days, Tune Library every 8 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Trapezoid versus Tune Library: the parameters behind the verdict, then further details
ParameterTrapezoidTune Library
Price$1.99 — better$2.99
Rating5.0 (2 ratings) — better3.8 (4 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings24 — better
Update frequencyEvery 9 days — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS10.0 — better15.1
Further details — not scored
Size46 MB36 MB
Age rating4+4+
DeveloperMichael EskinRobert Patt-Corner

Customer experience

Trapezoid

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Tune Library

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Trapezoid

No in-app purchases

None

Tune Library

No in-app purchases

Questions

Is Trapezoid free?
Trapezoid costs $1.99, with no in-app purchases.
Is Tune Library free?
Tune Library costs $2.99, with no in-app purchases.
Which has better reviews, Trapezoid or Tune Library?
Trapezoid is rated higher. Trapezoid averages 5.0 out of 5 from 2 ratings, while Tune Library averages 3.8 from 4 ratings.
Do Trapezoid or Tune Library have ads?
Neither Trapezoid nor Tune Library shows ads.
Which is updated more often, Trapezoid or Tune Library?
Trapezoid ships an update every 9 days, and Tune Library every 8 months. Most recently, Trapezoid was updated on November 2, 2026 and Tune Library on November 3, 2026.

Other comparisons