i vs Composer Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i
This app simulates orchestral instruments on iOS devices, allowing users to play musical scores using on-screen or external MIDI keyboards. Multiple users can collaborate to form a virtual orchestra, with each person playing a specific part.
- Orchestral instrument simulation
- MIDI input via on-screen or external keyboard
- PDF score display and playback
- Collaborative virtual orchestra formation
- Individual orchestral part simulation
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i-Orchestra is an iOS app that enables orchestral instrument simulation on a mobile device. It voices musical instrument samples by transmitting MIDI messages to the app via the on-screen MIDI keyboard or an external MIDI keyboard connected to the iOS device through the Apple Camera Connection Kit. The screen of the iOS device displays the musical score of the users' choice in pdf format, allowing the user to scroll over the score and play the score at the same time. A virtual orchestra can therefore be formed collaboratively by a group of users, each of whom individually simulates an orchestral part using the app.
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 rating: Composer Pro at 4.5 against i's 2.2. Composer Pro also leads on ratings volume (690 vs 5) and review sentiment (72% vs 50%). i's advantage is in-app purchases (none vs 4) and iOS requirement (8.0 vs 15.0). On price, update cadence, 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
Both are free to download. Composer Pro sells 4 in-app purchases, starting at $6.99 per 7 days. i asks for nothing beyond the download.
Composer Pro holds the better App Store score, 4.5 against 2.2. That said, the two scores are not equally well evidenced: Composer Pro has 690 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 50% of i's written reviews are positive against 72% of Composer Pro's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 15, 2026 and October 21, 2026 respectively.
| Parameter | i | Composer Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 2.2 (5 ratings) | 4.5 (690 ratings) — better |
| Positive reviews | 50.0% of reviews | 71.5% of reviews — better |
| Number of ratings | 5 | 690 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 336 MB | 161 MB |
| Age rating | 4+ | 4+ |
| Developer | Lee Cheng | 嵩 张 |
Customer experience
i
Composer Pro
Bugs and requests
i
Not enough reviews yet to summarise bugs or requests.
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
i
No in-app purchases
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
