# Fret Notes vs SonLerni

The clearest difference is price: SonLerni at Free against Fret Notes's $0.99. SonLerni also leads on update cadence (weekly vs every 15 months). Fret Notes's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

SonLerni is free to download; Fret Notes costs $0.99 up front. SonLerni sells 1 in-app purchase, starting at $59.99 per year. Fret Notes asks for nothing beyond the download.

Fret Notes ships an update every 15 months, SonLerni weekly. The most recent releases landed on October 25, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Fret Notes | SonLerni |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/sonlerni-language-immersion/id6751362941/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 0 MB | 81 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Luca Strazzullo](https://appshunter.io/developer/1037198989) | [Sonlerni LLC](https://appshunter.io/developer/1834763719) |

## What reviewers say

### Fret Notes

[App page](https://appshunter.io/ios/app/fret-notes/id1523698617)

**Features:** Vision Pro support

**In-app purchases:** none


### SonLerni

[App page](https://appshunter.io/ios/app/sonlerni-language-immersion/id6751362941)

Improve your listening comprehension in French, Spanish, German, and English with authentic audio and AI-powered explanations. Learn through real conversations and podcasts, with transcripts and study tools to reinforce understanding. Designed for intermediate learners to bridge the gap between reading and understanding native speakers.

**Highlights:** Authentic audio and podcasts, AI-powered explanations, Transcripts for listening support, Vocabulary review tools, Adjustable playback speed, Focus on real-world comprehension

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $59.99 | per year |


## Frequently asked questions

### Is Fret Notes free?

Fret Notes costs $0.99, with no in-app purchases.

### Is SonLerni free?

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

### Do Fret Notes or SonLerni have ads?

SonLerni shows ads; Fret Notes does not.

### Which is updated more often, Fret Notes or SonLerni?

Fret Notes ships an update every 15 months, and SonLerni weekly. Most recently, Fret Notes was updated on October 25, 2026 and SonLerni on November 5, 2026.

---

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