Comparison

3 vs Harmony Chack

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

Head to head
About

3

Create original songs in just 3 minutes with this intuitive music production and MIDI sequencer app. It offers over 100 instruments and easy editing tools, making songwriting fun for beginners and experienced users alike. Share your creations instantly within the app's community.

Highlights
  • Create music in 3 minutes
  • Over 100 instruments
  • Intuitive composition tools
  • MIDI sequencing
  • In-app community sharing
  • Adjust key, tempo, and volume
Features
Read full description

Create Music in Just 3 Minutes! An easy-to-use music production & MIDI sequencer app for everyone. musicLine is finally available on iOS! Even with no musical experience, you can create your own original songs using simple touch controls. It's an intuitive composition app that makes songwriting fun for everyone. Perfect for beginners, but also powerful enough for users who enjoy transcribing songs by ear or have experience with DAWs and MIDI sequencing. ā–½ Why you'll love musicLine Over 100 instruments Choose from piano, guitar, violin, music box, ocarina, and many more. Find the perfect sound for your music. Share your music instantly Post your songs directly to the in-app community and share your creations with music lovers around the world. ā–½ Powerful composition features Easy editing tools Quickly create music using the Pen, Eraser, Selection, Copy & Paste tools. Advanced music controls Adjust key, tempo (BPM), and individual track volumes to shape your sound. Start your composing journey today! Download musicLine now and bring your own melodies to life.

About

Harmony Chack

Features
Read full description

Hear the harmony that's in your head — and find out whether it actually works. You don't need an instrument. Play it on the on-screen keyboard, stack the parts, and listen. WHAT IT'S FOR - Adding a harmony line to a guitar solo - Working out how to voice a string arrangement - Saving a chord progression before you forget it - Thinking it through on headphones, anywhere WHAT YOU CAN DO Lay down chords The seven chords that fit your key are right there — tap to place one. Or build your own from a root, accidental, 7th, sus4 and tensions. Slash chords are supported. Common progressions like II-V-I and the blues can be dropped in whole. Stack up harmonies Record straight from the on-screen keyboard, up to four harmony parts. Each part has its own color, so you can see at a glance which note belongs where. Set the volume of each part, or hide one for a moment. Fix it afterwards Grab a recorded note and move it. Change its pitch, shorten it, delete it. No need to play the part again. Quantize to 16ths and other grids. Check it while it plays Play along with a click, drums and chord backing. Change the tempo and time signature, and loop a fixed number of bars so you can hear the same spot over and over. See it your way Switch between staff notation and piano roll. Zoom in horizontally for fine timing, or out vertically to see a wider range. Keep it Save what you build as a song, name it, and reorder your list. FREE Up to 8 bars, and two rock rhythms. Building chords, four harmony parts, recording and editing are all free. PREMIUM (one-time purchase) Unlocks all 16 bars and adds jazz, bossa nova, samba and techno rhythms. Pay once — nothing further. Note: the app is designed for landscape. Works on both iPhone and iPad.

Screenshots

34 screens
Harmony Chack4 screens

Verdict

The call

The clearest difference is in-app purchases: 3 at none against Harmony Chack's 1. Harmony Chack's advantage is ads (none vs shown) and iOS requirement (16.0 vs 18.0). On price, update cadence and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Harmony Chack sells 1 one-off in-app purchase. 3 asks for nothing beyond the download.

UpkeepUpdate frequency

3 ships an update weekly, Harmony Chack fortnightly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Ā· 5 level
3 versus Harmony Chack: the parameters behind the verdict, then further details
Parameter3Harmony Chack
PriceFreeFree
Positive reviews68.8% of reviews—
Update frequencyWeekly — betterFortnightly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.0 — better
Further details — not scored
Size243 MB34 MB
Age rating12+4+
DeveloperKatsuma AkamatsuHironori Karube

In-app purchases

None

3

No in-app purchases

1 purchases

Harmony Chack

One-time1
  • ćƒ—ćƒ¬ćƒŸć‚¢ćƒ $0.99

Questions

Is 3 free?
3 is free to download, with no in-app purchases.
Is Harmony Chack free?
Harmony Chack is free to download, with in-app purchases available.
Do 3 or Harmony Chack have ads?
3 shows ads; Harmony Chack does not.
Which is updated more often, 3 or Harmony Chack?
3 ships an update weekly, and Harmony Chack fortnightly. Most recently, 3 was updated on November 5, 2026 and Harmony Chack on October 31, 2026.

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