# StaveFlow vs Sine

The clearest difference is monetization model: Sine at freemium against StaveFlow's subscription. Sine also leads on ratings volume (628 vs 5) and update cadence (every 2 days vs every 4 days). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. StaveFlow sells 2 in-app purchases, starting at $4.99 per month and Sine sells 3 in-app purchases, starting at $1.99 per month. 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 StaveFlow against 4.9 for Sine. That said, the two scores are not equally well evidenced: Sine has 628 ratings behind it against 5, so its average is the more settled of the two.

StaveFlow ships an update every 4 days, Sine every 2 days. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | StaveFlow | Sine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/staveflow/id6808704520/reviews)** | [4.9 (628 ratings)](https://appshunter.io/ios/app/sine-ear-training-games/id6809608874/reviews) |
| Number of ratings | 5 | **628** |
| Positive reviews | — | 95.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Subscription | **Freemium** |
| Best chart rank | — | **#208** |
| Size | 65 MB | 136 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JAVIER CONCEPCION JR](https://appshunter.io/developer/6808704522) | [Ethan Liao](https://appshunter.io/developer/6809608877) |

## What reviewers say

### StaveFlow

[App page](https://appshunter.io/ios/app/staveflow/id6808704520)

This app streamlines music lesson management for teachers and students. It combines class organization, note-taking, sheet music access, and progress tracking in a single platform. It supports various instruments and adapts to different studio needs.

**Highlights:** Class management, Lesson notes, Sheet music library, Progress tracking, Instrument adaptability, Studio organization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $4.99 | per month |
| Yearly Plan | $40.00 | per year |


### Sine

[App page](https://appshunter.io/ios/app/sine-ear-training-games/id6809608874)

**Currently charting:** #208 Top Free · Education (US App Store)

Develop your ear for music with interactive games and focused practice. Learn to identify notes and chords accurately through a progressive system designed for consistent improvement. Track your progress and earn badges as you master your auditory skills.

**Highlights:** Note and chord identification, Progressive difficulty levels, Interactive ear training games, Detailed performance statistics, Gamified progress tracking with badges, Multiplayer ear training challenges

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Encore Monthly | $1.99 | per month |
| Encore Yearly | $14.99 | per year |
| Encore Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is StaveFlow free?

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

### Is Sine free?

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

### Which has better reviews, StaveFlow or Sine?

StaveFlow is rated higher. StaveFlow averages 5.0 out of 5 from 5 ratings, while Sine averages 4.9 from 628 ratings.

### Do StaveFlow or Sine have ads?

Neither StaveFlow nor Sine shows ads.

### Which is updated more often, StaveFlow or Sine?

StaveFlow ships an update every 4 days, and Sine every 2 days. Most recently, StaveFlow was updated on October 31, 2026 and Sine on November 1, 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.*