Comparison

PentaMonochord vs Come & Sing

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

Head to head
About

PentaMonochord

Explore the relationship between pitch and string length with a digital monochord. Build scales, hear intervals, and learn about Pythagorean music theory through interactive blocks and historical context.

Highlights
  • Build two-octave G pentatonic scales
  • Hear and see interval relationships
  • View Hertz frequencies and string lengths
  • Play pentatonic tunes
  • Scale-building game mode
  • Background information on monochord system
  • Historical timeline
Features
Read full description

The Pythagoreans’ foremost innovation was to correlate pitch relationships to calibrated speaking lengths of a string on a monochord. Now, for the first time, there’s an app for that! Use IntervalBlocks to build a two-octave G pentatonic scale on the PentaMonochord using only octaves and fifths. Touch any block to see and hear its interval again, and watch the Hertz box to see how the frequencies of the two notes relate inversely to the string lengths represented by the IntervalBlock. Touch the note labels any time to play a pentatonic tune. Press “Switch to Game” to join the Pythagorean pantheon by building the whole scale with the minimum number of steps. The Intro and the Background Information explain the monochord system in detail, and the Timeline puts it all in perspective.

About

Come & Sing

An audio songbook for harmony singing, offering over 100 polyphonic titles from global cultures. Learn parts, practice with guitar accompaniment, and sync lyrics. Discover live singing events and new songs regularly.

Highlights
  • Over 100 polyphonic world music titles
  • Learn and practice individual vocal parts
  • Guitar accompaniment tracks
  • Synchronized lyrics
  • Live singing event calendar
  • Free download with 3 titles
Features
Read full description

Mantras, chants & songs for a harmonious life on Earth The new audio songbook for community choirs, families and everyone who enjoys harmony singing, for all ages, for your daily life and to take always with you! Listen to and learn the different parts, bring back other parts or the guitar accompaniment from the player. Enjoy the harmonies and do it any way you want! Join in easily at one of the many live singing events that you can find in the calendar. Features: • More than 100 polyphonic titles from the cultures of the world • For singing groups, choirs, schools & everyone who likes to sing from 0 to 120 years old • Free download with 3 titles, • Get access to the whole content or just the singles you like • All individual parts can be freely combined in any way • Guitar accompaniment to practice or for playing along • Synchronised lyrics for all different parts • All lyrics with harmonies for easy playing • Sheet music (if copyright-free) with harmonies for piano & guitar • Advices on practicing and backgrounds to the songs • Links to authors and sources • SingEvent - Calendar with dates for SingCamps, festivals, congresses and song nights etc. • Ongoing new songs and events • With special guests • Available for German and English-speaking friends All audios were sung for you with a lot of joy by the Canto Street Band & friends in the Studio Forstmehren (Westerwald/Germany).

Screenshots

PentaMonochord4 screens
Come & Sing4 screens

Verdict

The call

The clearest difference is price: Come & Sing at Free against PentaMonochord's $1.99. Come & Sing also leads on update cadence (every 4 months vs every 24 months). PentaMonochord's advantage is in-app purchases (none vs 31) and iOS requirement (12.0 vs 15.0). On ads and 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

Come & Sing is free to download; PentaMonochord costs $1.99 up front. Come & Sing sells 31 one-off in-app purchases. PentaMonochord asks for nothing beyond the download.

UpkeepUpdate frequency

PentaMonochord ships an update every 24 months, Come & Sing every 4 months. The most recent releases landed on October 30, 2026 and October 23, 2026 respectively.

Scorecard5 real differences · 5 level
PentaMonochord versus Come & Sing: the parameters behind the verdict, then further details
ParameterPentaMonochordCome & Sing
Price$1.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 24 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size12 MB14 MB
Age rating4+4+
DeveloperLucy HudsonAnke Bolz

Customer experience

PentaMonochord

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Come & Sing

Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PentaMonochord

No in-app purchases

31 purchases

Come & Sing

One-time31
  • So treiben wir den Winter aus$1.99
  • Thank you for this day (Chant)$1.99
  • Thank you for this day (Round)$1.99
Show 28 more
  • The earth is turning$1.99
  • Und in dem Schneegebirge$1.99
  • The river is flowing$1.99
  • Ubuntu$1.99
  • Was wir alleine nicht schaffen$1.99
  • We are the world$1.99
  • We want peace$1.99
  • We are together$1.99
  • When the sun's reborn$1.99
  • With all our hearts$1.99
  • Weihnachtsglocken läuten$1.99
  • Wie der Wind die Wolken treibt$1.99
  • Winterpracht$1.99
  • Wishi ta duia$1.99
  • Wie die Erde$1.99
  • Yemaja assessu$1.99
  • Wie schön blüht uuns der Maien$1.99
  • Om mani (with Philipp Stegmüller)$2.99
  • Oma Emilia$2.99
  • Peace Songs (with Lea Morris)$2.99
  • Romale$2.99
  • Sa kore sam$2.99
  • Song of the stars$2.99
  • Woods$2.99
  • The Power is here now$2.99
  • Together$2.99
  • Wieder nach vorn schaun(with Iria)$2.99
  • Voller Zugang$14.99

Questions

Is PentaMonochord free?
PentaMonochord costs $1.99, with no in-app purchases.
Is Come & Sing free?
Come & Sing is free to download, with in-app purchases available.
Do PentaMonochord or Come & Sing have ads?
Neither PentaMonochord nor Come & Sing shows ads.
Which is updated more often, PentaMonochord or Come & Sing?
PentaMonochord ships an update every 24 months, and Come & Sing every 4 months. Most recently, PentaMonochord was updated on October 30, 2026 and Come & Sing on October 23, 2026.

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