# Stickey Intervals vs Opus

The clearest difference is price: Opus at Free against Stickey Intervals's $9.99. Opus also leads on update cadence (weekly vs every 4 months). Stickey Intervals's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 18.0). On ads and device support there is nothing between them.

Opus is free to download; Stickey Intervals costs $9.99 up front. Opus sells 2 in-app purchases, starting at $5.99 per month. Stickey Intervals asks for nothing beyond the download.

Stickey Intervals ships an update every 4 months, Opus weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Stickey Intervals | Opus |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stickey-intervals/id6450140718/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | — |
| Size | 55 MB | 130 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Laura Gabrielson](https://appshunter.io/developer/1625473126) | [Cyberic Limited](https://appshunter.io/developer/1874822564) |

## What reviewers say

### Stickey Intervals

[App page](https://appshunter.io/ios/app/stickey-intervals/id6450140718)

Learn and identify musical intervals through engaging games on piano and staff. Features single and two-player modes, interactive exploration, and customizable settings for a personalized learning experience.

**Highlights:** Identify intervals on piano keyboard, Identify intervals on musical staff, Single-player games with time or lives, Two-player competitive modes, Interactive interval exploration, Customizable settings (key signature, note naming)

**Features:** Vision Pro support

**In-app purchases:** none


### Opus

[App page](https://appshunter.io/ios/app/opus-classical-music-guide/id6758754835)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $5.99 | per month |
| Annual | $49.99 | per year |


## Frequently asked questions

### Is Stickey Intervals free?

Stickey Intervals costs $9.99, with no in-app purchases.

### Is Opus free?

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

### Do Stickey Intervals or Opus have ads?

Neither Stickey Intervals nor Opus shows ads.

### Which is updated more often, Stickey Intervals or Opus?

Stickey Intervals ships an update every 4 months, and Opus weekly. Most recently, Stickey Intervals was updated on November 3, 2026 and Opus on October 31, 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.*