# Opus Great vs 1 to A

Opus Great and 1 to A are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Opus Great sells 4 one-off in-app purchases and 1 to A sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Opus Great against 5.0 for 1 to A. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

## The numbers

| Metric | Opus Great | 1 to A |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/opus-great/id6499111554/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/1-to-a/id6747511294/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 14 MB |
| Requires iOS | **17.0** | 18.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [昇 陈](https://appshunter.io/developer/1725916824) | [Sean Moses](https://appshunter.io/developer/1821187325) |

## What reviewers say

### Opus Great

[App page](https://appshunter.io/ios/app/opus-great/id6499111554)

Organize, search, and access your PDF sheet music library seamlessly across devices. Create custom collections, mark favorites, and enjoy a distraction-free reading experience designed for practice and performance.

**Highlights:** Organize PDF sheet music, Search by title or composer, Create custom music books, Syncs via iCloud, Smart PDF reader, Full-screen performance mode

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Water | $0.99 | one-time |
| Buy Me a Coffee | $1.99 | one-time |
| Buy Me a Cake | $3.99 | one-time |
| Lifetime Pro | $9.99 | one-time |


### 1 to A

[App page](https://appshunter.io/ios/app/1-to-a/id6747511294)

Learn the Nashville Number System for music. Select a key and instantly see corresponding chords. Tap any number to view fingering diagrams.

**Highlights:** Nashville Number System explained, Chord translations for major keys, Fingering diagrams for chords, Key selection, Interactive chord lookup

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 to A Premium | $1.99 | one-time |


## Frequently asked questions

### Is Opus Great free?

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

### Is 1 to A free?

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

### Which has better reviews, Opus Great or 1 to A?

Opus Great and 1 to A are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Opus Great or 1 to A have ads?

Neither Opus Great nor 1 to A shows ads.

---

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