4' 33" vs IMSLP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4' 33"
Experience and share a unique musical performance. Explore over 2,500 existing renditions of a conceptual piece. This app allows you to create and contribute your own silent performance.
- Create performances
- Share performances
- Listen to existing performances
- Explore 2,500+ renditions
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Create a performance of John Cage's 4' 33" and share the results with the world. Listen to the more than 2,500 performances that have already been created.
IMSLP
Access a vast digital library of classical music scores on your iOS device. Enjoy full access to commercial recordings, instant downloads, and new uploads with a membership subscription. Support the music community while exploring a comprehensive collection.
- Browse IMSLP/Petrucci Music Library
- View musical scores
- Access commercial recordings
- Instant downloads
- Access new uploads instantly
- Membership subscription benefits
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Browse IMSLP/Petrucci Music Library and view scores from the comfort of your iOS device. IMSLP Membership Subscription Length of subscription: 1 month. Benefits include: • Full access to commercial recordings • Access all features in this app • No waiting for downloads • Access new uploads instantly • Knowing that you helped keep IMSLP running and serving the music community 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 publication, where applicable. Terms of Service and Privacy policy - https://imslp.org/wiki/IMSLP:Terms_of_Service_and_Privacy_policy_(app)
Screenshots
Verdict
The clearest difference is price: IMSLP at Free against 4' 33"'s $0.99. IMSLP also leads on update cadence (every 10 days vs every 11 months) and ratings volume (512 vs 13). 4' 33"'s advantage is in-app purchases (none vs 1) and iOS requirement (9.0 vs 13.0). On rating, review sentiment, 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
IMSLP is free to download; 4' 33" costs $0.99 up front. IMSLP sells 1 in-app purchase, starting at $3.99 per month. 4' 33" asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.5 for 4' 33" against 4.6 for IMSLP. That said, the two scores are not equally well evidenced: IMSLP has 512 ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 64% of 4' 33"'s written reviews are positive against 70% of IMSLP's.
4' 33" ships an update every 11 months, IMSLP every 10 days. Both last shipped on October 24, 2026.
| Parameter | 4' 33" | IMSLP |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.5 (13 ratings) | 4.6 (512 ratings) — better |
| Positive reviews | 64.3% of reviews | 70.0% of reviews — better |
| Number of ratings | 13 | 512 — better |
| Update frequency | Every 11 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 70 MB | 232 MB |
| Age rating | 4+ | 4+ |
| Developer | Larson Associates | Project Petrucci LLC |
Customer experience
4' 33"
IMSLP
Bugs and requests
4' 33"
Not enough reviews yet to summarise bugs or requests.
IMSLP
Reported bugs
6 issues- Crashes when opening scores
- Scores disappearing from library
- Login issues and lost data
- Incompatibility with older devices after updates
- Annotation issues causing loss of data
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- Inability to edit file information after import
Requested features
11 requests- Predictive text for score annotations
- Ability to restore original zoom settings
- Metric to indicate device performance during page turns
- Folder-like organization system
- Color wheel and custom pen/highlighter options
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- Ability to rename music files
- Different color folder options
- Split view support
- Easier way to import scores from other sources
- Instrumentation information for scores
- Sorting by instrumentation
In-app purchases
4' 33"
No in-app purchases
IMSLP
- Membership Subscription$3.991 Month
