Comparison

Flat vs Composer Pro

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

Head to head
About

Flat

Create, edit, and play sheet music and guitar tabs with this intuitive composer app. It offers a wide range of instruments, notation tools, and collaboration features. Import and export in various formats, and share your creations with a large community.

Highlights
  • Compose and edit sheet music
  • Create guitar tabs
  • Real-time collaboration
  • Import MusicXML, MIDI, PDF
  • Export to PDF, MIDI, MP3, WAV
  • Large community library
  • 90+ instruments
Features
Read full description

Write, play and share music, anywhere! Flat is the sheet music app trusted by 5M+ musicians worldwide. Compose, notate, and collaborate on scores for any instrument, from guitar tabs to full orchestras, across iPhone, iPad, Mac, and your web browser. Free features include: → Quick notation input via touch piano, guitar fretboard, or drum pads → 90+ instruments including piano, guitar, violin, saxophone, drums, voice, and more → 100K+ original scores in the community → Edit music scores on iPhone, iPad, Mac, and in your web browser → Hundreds of notation symbols: articulations, dynamics, measures, text, and more → Autocompletion when adding chords → Transposition by key, interval, or tone → Import MusicXML and MIDI files → Import PDF sheet music and convert it into fully editable scores → Keyboard shortcuts for iPad keyboard and fretboard → Share scores publicly or privately Collaborate in real-time: → Real-time collaboration for a dynamic experience → Inline comments for live feedback → Find collaborators in the Flat community Share your music: → Join the monthly Flat community challenge and win prizes → Explore hundreds of thousands of original scores from composers worldwide → Get featured and connect with fellow musicians Subscribe to Flat Power to unlock the full experience across all your devices. Flat Power, premium features: → Unlimited cloud storage → Automatic sync so your full library stays connected on iPhone, iPad, Mac, and web browser → 180+ instruments including high-quality audio → Advanced export: individual parts, multi-rest print, remove Flat branding → Layout and styles: page dimensions, spacing, chord style, Jazz and Handwritten fonts → Custom note heads: Boomwhackers colors, Note Names, Shape-Note (Aiken) → Version history: view and revert to any past version of your scores → Advanced audio: per-part volume and reverb controls → Input notes with MIDI devices (USB and Bluetooth) → Autosave with full version history → Customizable keyboard shortcuts → Priority support → PDF and photo import pages included with every plan: - Monthly plan: 10 PDF import pages/month + full premium features - Yearly plan: 20 PDF import pages/month + full premium features (best value) - Lifetime plan: full premium features + 20 PDF import pages (one-time purchase, no renewal) Terms for in-app payments: Payment will be charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the period. Manage and cancel subscriptions in your App Store account settings. Any unused portion of a free trial, if offered, will be forfeited when a subscription is purchased. Our Terms of Service and Privacy Policy: https://flat.io/help/en/policies Questions or feedback: ios@flat.io

About

Composer Pro

Compose music scores with ease using a familiar keyboard layout. This app supports multiple parts, a wide range of instruments, and various musical symbols, making it suitable for both beginners and experienced musicians.

Highlights
  • Keyboard-style note input
  • Support for up to 8 parts
  • Over 100 instruments
  • Variety of music symbols
  • Configurable parts and settings
  • Instrument transposition
  • Export without watermark
Features
Read full description

A handy sheet music writer app, make writing sheet music feels like typing notes. Tap on the keys with notation in a familiar keyboard layout. Provide a very easy way to compose music score. Support up to 8 parts, over 100 instruments, variety of music symbols and notations. It is very friendly for rookies while professional enough for experts. --------------------------------- UNLIMITED ACCESS SUBSCRIPTION - Support up to 8 parts - Config parts(add, delete, reorder) - Change key for each part - Change beat type and tempo - Config clef for each staff - Config sound for each part - No watermark image export - No Ads - Support 2nd voice part - Transpose instruments - Change keyboard size - Import data file - Unlock all 100+ instruments - The subscriptions are $9.99 monthly and $49.99 yearly with free trial - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that service, where applicable - Terms of use: https://service.notationpad.com/terms_service.html

Screenshots

Flat4 screens
Composer Pro4 screens

Verdict

The call

The clearest difference is monetization model: Flat at freemium against Composer Pro's subscription. Flat also leads on update cadence (fortnightly vs every 2 months) and ratings volume (7K vs 697). On price, rating, review sentiment and ads 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

Both are free to download. Flat sells 10 in-app purchases, starting at $9.99 per month and Composer Pro sells 4 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Flat against 4.5 for Composer Pro. That said, the two scores are not equally well evidenced: Flat has 7K ratings behind it against 697, so its average is the more settled of the two. Written reviews are what separate them: 68% of Flat's written reviews are positive against 72% of Composer Pro's.

UpkeepUpdate frequency

Flat ships an update fortnightly, Composer Pro every 2 months. The most recent releases landed on November 5, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 7 level
Flat versus Composer Pro: the parameters behind the verdict, then further details
ParameterFlatComposer Pro
PriceFreeFree
Rating4.6 (7K ratings) — better4.5 (697 ratings)
Positive reviews67.8% of reviews71.5% of reviews — better
Number of ratings7K — better697
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
Best chart rank#138 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.415.0 — better
Further details — not scored
Size219 MB161 MB
Age rating+44+
DeveloperTutteo Limited嵩 张

Customer experience

Flat

All ratings6,980 ratings
Positive90.8%
Neutral3.7%
Negative5.5%
Written reviews946 reviews
Positive67.8%
Neutral13.4%
Negative18.8%

Composer Pro

All ratings685 ratings
Positive86.4%
Neutral5.5%
Negative8.0%
Written reviews260 reviews
Positive71.5%
Neutral7.7%
Negative20.8%

User reviews

Flat

From 7K App Store ratings

What we love

  • 🚀 Easy to use
  • 👍 Great for beginners
  • 🎨 Lots of customization options
  • 🎶 Extensive instrument selection
  • 💡 Collaborative features

Room to improve

  • 🐛 Buggy and glitchy
  • 🔒 Limited free features
  • 💰 Expensive subscription
  • 🔊 Poor audio quality
  • 📏 Rigid layout and formatting

Composer Pro

From 697 App Store ratings

What we love

  • 👍 User-friendly interface
  • 🎼 Helpful for composing music
  • 🎹 Good for beginners
  • 💡 Allows creating sheet music

Room to improve

  • 💰 Subscription model too expensive
  • 🔒 Limited features in free version
  • 📢 Too many ads
  • 🐛 Bugs and glitches
  • 🔒 Forced to pay for basic functionality

Bugs and requests

Flat

Reported bugs

5 issues
  • App crashes frequently
  • Notes and rests disappear
  • Playback issues and audio glitches
  • Difficulty selecting and editing notes
  • Syncing and saving problems

Requested features

5 requests
  • Add more percussion instruments
  • Improve note entry and editing
  • Allow custom soundfonts
  • Implement measure repeat signs
  • Add more advanced notation options

Composer Pro

Reported bugs

3 issues
  • Notes sometimes placed incorrectly
  • Measures and compositions randomly deleted
  • Inability to restore deleted content

Requested features

5 requests
  • Add more instruments beyond piano
  • Allow changing time signatures and key signatures without subscription
  • Improve note editing and placement
  • Add export options to save/share compositions
  • Provide more music notation tools and dynamics

In-app purchases

10 purchases

Flat

Subscriptions4
  • Flat Power (Monthly)$9.991 Month
  • Flat Power (Yearly)$29.991 Year
  • Flat Power (Yearly)$39.991 Year
Show 1 more
  • Flat Power (Yearly)$49.991 Year
One-time6
  • PDF import 30 credits$9.99
  • PDF import 70 credits$17.99
  • Flat Power (Lifetime)$119.00
Show 3 more
  • Flat Power (Lifetime)$179.99
  • Flat Power (Lifetime)$199.00
  • Flat Power (Lifetime)$299.99
4 purchases

Composer Pro

Subscriptions4
  • Unlimited Access$6.997 Days
  • Pro Access$9.991 Month
  • Pro Access$49.991 Year
Show 1 more
  • Pro Access7 Days trial$49.991 Year

Questions

Is Flat free?
Flat is free to download, with in-app purchases available.
Is Composer Pro free?
Composer Pro is free to download, with in-app purchases available.
Which has better reviews, Flat or Composer Pro?
Flat is rated higher. Flat averages 4.6 out of 5 from 7K ratings, while Composer Pro averages 4.5 from 697 ratings.
Do Flat or Composer Pro have ads?
Neither Flat nor Composer Pro shows ads.
Which is updated more often, Flat or Composer Pro?
Flat ships an update fortnightly, and Composer Pro every 2 months. Most recently, Flat was updated on November 5, 2026 and Composer Pro on November 3, 2026.

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