Flat vs Composer Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- 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
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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
Verdict
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
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.
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.
Flat ships an update fortnightly, Composer Pro every 2 months. The most recent releases landed on November 5, 2026 and November 3, 2026 respectively.
| Parameter | Flat | Composer Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (7K ratings) — better | 4.5 (697 ratings) |
| Positive reviews | 67.8% of reviews | 71.5% of reviews — better |
| Number of ratings | 7K — better | 697 |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium — better | Subscription |
| Best chart rank | #138 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 219 MB | 161 MB |
| Age rating | +4 | 4+ |
| Developer | Tutteo Limited | 嵩 张 |
Customer experience
Flat
Composer Pro
User reviews
Flat
From 7K App Store ratingsWhat 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 ratingsWhat 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
Flat
- Flat Power (Monthly)$9.991 Month
- Flat Power (Yearly)$29.991 Year
- Flat Power (Yearly)$39.991 Year
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- Flat Power (Yearly)$49.991 Year
- PDF import 30 credits$9.99
- PDF import 70 credits$17.99
- Flat Power (Lifetime)$119.00
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- Flat Power (Lifetime)$179.99
- Flat Power (Lifetime)$199.00
- Flat Power (Lifetime)$299.99
Composer Pro
- Unlimited Access$6.997 Days
- Pro Access$9.991 Month
- Pro Access$49.991 Year
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- Pro Access7 Days trial$49.991 Year









