# Rosetta Stone Sapphire vs JustinGuitar Note Trainer

The clearest difference is review sentiment: JustinGuitar Note Trainer at 80% against Rosetta Stone Sapphire's 28%. JustinGuitar Note Trainer also leads on in-app purchases (none vs 1) and chart position (#54 vs unranked). Rosetta Stone Sapphire's advantage is price (Free vs $4.99) and ratings volume (2.1K vs 5). On update cadence, ads, device support and iOS requirement there is nothing between them.

Rosetta Stone Sapphire is free to download; JustinGuitar Note Trainer costs $4.99 up front. Rosetta Stone Sapphire sells 1 in-app purchase, starting at $19.99 per month. JustinGuitar Note Trainer asks for nothing beyond the download.

Rosetta Stone Sapphire holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Rosetta Stone Sapphire has 2.1K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 28% of Rosetta Stone Sapphire's written reviews are positive against 80% of JustinGuitar Note Trainer's, so the app with the better star average is not the one people write more warmly about.

Rosetta Stone Sapphire ships an update every 2 weeks, JustinGuitar Note Trainer fortnightly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Rosetta Stone Sapphire | JustinGuitar Note Trainer |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.6 (2.1K ratings)](https://appshunter.io/ios/app/rosetta-stone-sapphire/id6757200007/reviews)** | [4.4 (5 ratings)](https://appshunter.io/ios/app/justinguitar-note-trainer/id6761114951/reviews) |
| Number of ratings | **2.1K** | 5 |
| Positive reviews | 28.3% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#54** |
| Size | 196 MB | 40 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rosetta Stone, Ltd.](https://appshunter.io/developer/349688821) | [Justin Guitar](https://appshunter.io/developer/502491353) |

## What reviewers say

### Rosetta Stone Sapphire

[App page](https://appshunter.io/ios/app/rosetta-stone-sapphire/id6757200007)

Learn a new language through bite-sized, immersive lessons and real-world practice scenarios. Perfect your pronunciation with advanced speech recognition technology and explore over 25 languages. Customize your learning with flashcards and games.

**Highlights:** Bite-sized immersive lessons, Advanced speech recognition, Real-world practice scenarios, Access to 25+ languages, Customizable flashcards and games, Cross-platform access (mobile & web)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rosetta Stone Sapphire | $19.99 | per month |


### JustinGuitar Note Trainer

[App page](https://appshunter.io/ios/app/justinguitar-note-trainer/id6761114951)

**Currently charting:** #54 Top Paid · Education (US App Store)

Master the guitar fretboard quickly with daily exercises designed to build a deep understanding of note locations. This app helps you stop guessing and start knowing every note on your guitar, improving your playing.

**Highlights:** Learn fretboard notes fast, Daily 5-minute exercises, Build mental map of guitar neck, Stop guessing, start knowing notes, Smart repetition for weak spots, Practice anywhere on your phone

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

**In-app purchases:** none


## Frequently asked questions

### Is Rosetta Stone Sapphire free?

Rosetta Stone Sapphire is free to download, with in-app purchases available.

### Is JustinGuitar Note Trainer free?

JustinGuitar Note Trainer costs $4.99, with no in-app purchases.

### Which has better reviews, Rosetta Stone Sapphire or JustinGuitar Note Trainer?

Rosetta Stone Sapphire is rated higher. Rosetta Stone Sapphire averages 4.6 out of 5 from 2.1K ratings, while JustinGuitar Note Trainer averages 4.4 from 5 ratings.

### Do Rosetta Stone Sapphire or JustinGuitar Note Trainer have ads?

Neither Rosetta Stone Sapphire nor JustinGuitar Note Trainer shows ads.

### Which is updated more often, Rosetta Stone Sapphire or JustinGuitar Note Trainer?

Rosetta Stone Sapphire ships an update every 2 weeks, and JustinGuitar Note Trainer fortnightly. Most recently, Rosetta Stone Sapphire was updated on October 28, 2026 and JustinGuitar Note Trainer on October 25, 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.*