# Henle Library vs IMSLP

The clearest difference is rating: IMSLP at 4.6 against Henle Library's 2.9. IMSLP also leads on review sentiment (70% vs 34%) and update cadence (every 10 days vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Henle Library sells 8 one-off in-app purchases and IMSLP sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

IMSLP holds the better App Store score, 4.6 against 2.9. That said, the two scores are not equally well evidenced: IMSLP has 507 ratings behind it against 91, so its average is the more settled of the two. Written reviews point the same way: 34% of Henle Library's written reviews are positive against 70% of IMSLP's.

Henle Library ships an update every 2 months, IMSLP every 10 days. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Henle Library | IMSLP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (91 ratings)](https://appshunter.io/ios/app/henle-library/id1021283948/reviews) | **[4.6 (507 ratings)](https://appshunter.io/ios/app/imslp/id1373671782/reviews)** |
| Number of ratings | 91 | **507** |
| Positive reviews | 34.2% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 54 MB | 232 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guenter Henle Verlag](https://appshunter.io/developer/1416460395) | [Project Petrucci LLC](https://appshunter.io/developer/1373671781) |

## What reviewers say

### Henle Library

[App page](https://appshunter.io/ios/app/henle-library/id1021283948)

Access high-quality digital Urtext editions of classical music scores on your tablet. Practice, rehearse, and perform with a range of interactive features designed for musicians of all levels. Enjoy annotations, metronome, playback, and more.

**Highlights:** Digital Urtext editions, Customizable score purchases, Print and export PDFs, Score modification and annotations, Metronome and recording, Part and score switching, Explanatory notes access

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Credits | $0.99 | one-time |
| 22 Credits | $1.99 | one-time |
| 55 Credits | $5.99 | one-time |
| 100 Credits | $9.99 | one-time |
| 200 Credits | $19.99 | one-time |
| 300 Credits | $29.99 | one-time |
| 500 Credits | $49.99 | one-time |
| 1000 Credits | $79.99 | one-time |

**What reviewers like**

- 📚 High-quality Henle urtext editions
- ✏️ Annotation and marking capabilities
- 🎵 Beautiful score formatting and rendering
- 🎚️ Customizable spacing and sizing options
- 🎹 Multiple fingering/bowing variants available

**What reviewers complain about**

- 🐛 Annotations frequently disappear or get lost
- ✏️ Eraser function unreliable and non-intuitive
- 🖊️ Apple Pencil annotation tools difficult to use
- 📖 Multi-movement scores split into individual pieces
- 🖨️ Poor print quality with severe aliasing

**Reported bugs**

- Annotations deleted after app updates or restarts
- Eraser function fails to remove marks consistently
- Marks don't record when crossing between staff lines
- App crashes when opening purchased scores
- Purchased scores disappear from library

**Requested features**

- Undo/redo functionality for annotations
- Ability to print entire multi-movement pieces together
- Half-page turning option for performers
- Playlist or collection grouping system
- Individual score parts (not just full scores)


### IMSLP

[App page](https://appshunter.io/ios/app/imslp/id1373671782)

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.

**Highlights:** Browse IMSLP/Petrucci Music Library, View musical scores, Access commercial recordings, Instant downloads, Access new uploads instantly, Membership subscription benefits

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Membership Subscription | $3.99 | per month |

**What reviewers like**

- 🚀 Integrated IMSLP library
- 👍 Well-made app
- 👍 Game changer for musicians
- 👍 Indispensable for professionals and amateurs
- 👍 Fantastic offering

**What reviewers complain about**

- 🐛 Crashes when zooming in and annotating
- 💰 Money grabbing with constant subscription prompts
- 🐛 Frequent crashes and freezes
- 🐛 Annotation issues and lost data
- 🐛 Battery drain on iPad

**Reported bugs**

- 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

**Requested features**

- 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


## Frequently asked questions

### Is Henle Library free?

Henle Library is free to download, with in-app purchases available.

### Is IMSLP free?

IMSLP is free to download, with in-app purchases available.

### Which has better reviews, Henle Library or IMSLP?

IMSLP is rated higher. Henle Library averages 2.9 out of 5 from 91 ratings, while IMSLP averages 4.6 from 507 ratings.

### Do Henle Library or IMSLP have ads?

Neither Henle Library nor IMSLP shows ads.

### Which is updated more often, Henle Library or IMSLP?

Henle Library ships an update every 2 months, and IMSLP every 10 days. Most recently, Henle Library was updated on October 14, 2026 and IMSLP on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*