# Know Notes vs Marbles PS RH+

The clearest difference is update cadence: Know Notes at fortnightly against Marbles PS RH+'s every 25 months. Marbles PS RH+'s advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Know Notes sells 6 one-off in-app purchases and Marbles PS RH+ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Know Notes ships an update fortnightly, Marbles PS RH+ every 25 months. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Know Notes | Marbles PS RH+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (32 ratings)](https://appshunter.io/ios/app/know-notes-learn-music/id1536356966/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 95.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 25 months |
| Monetization | Free with in-app purchases | — |
| Size | 107 MB | 113 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [wylan neely](https://appshunter.io/developer/1261508202) | [RH POZITIF TEKNOLOJI AS](https://appshunter.io/developer/1770083912) |

## What reviewers say

### Know Notes

[App page](https://appshunter.io/ios/app/know-notes-learn-music/id1536356966)

Develop your musical ear by learning to identify notes and chords by sound. This gamified app makes practicing fun and competitive, allowing you to progress from basic notes to sharps and flats.

**Highlights:** Ear training, Note recognition, Chord recognition, Gamified learning, Progressive difficulty, Natural notes, sharps, and flats

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Violin Notes | $0.99 | one-time |
| Electronic Keyboard Notes | $0.99 | one-time |
| Grand Piano Notes | $0.99 | one-time |
| Unlock Violin Instrument | $2.99 | one-time |
| Acoustic Guitar (Major Chords) | $2.99 | one-time |
| Unlock Acoustic Guitar | $3.99 | one-time |


### Marbles PS RH+

[App page](https://appshunter.io/ios/app/marbles-ps-rh-plus/id1596446170)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Know Notes free?

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

### Is Marbles PS RH+ free?

Marbles PS RH+ is free to download, with in-app purchases available.

### Do Know Notes or Marbles PS RH+ have ads?

Neither Know Notes nor Marbles PS RH+ shows ads.

### Which is updated more often, Know Notes or Marbles PS RH+?

Know Notes ships an update fortnightly, and Marbles PS RH+ every 25 months. Most recently, Know Notes was updated on October 17, 2026 and Marbles PS RH+ on October 5, 2026.

---

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