# Know Notes vs Otteretto

The clearest difference is update cadence: Know Notes at fortnightly against Otteretto's every 9 months. Know Notes also leads on ratings volume (31 vs 8). Otteretto's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.9 for Know Notes against 5.0 for Otteretto. Both are backed by a comparable volume of ratings — 31 and 8 respectively. Written reviews are what separate them: 96% of Know Notes's written reviews are positive against 100% of Otteretto's.

Know Notes ships an update fortnightly, Otteretto every 9 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Know Notes | Otteretto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (31 ratings)](https://appshunter.io/ios/app/know-notes-learn-music/id1536356966/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/otteretto/id1608448950/reviews)** |
| Number of ratings | **31** | 8 |
| Positive reviews | 95.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 9 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 107 MB | 14 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [wylan neely](https://appshunter.io/developer/1261508202) | [Christopher Klimowski](https://appshunter.io/developer/1608448952) |

## 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 |


### Otteretto

[App page](https://appshunter.io/ios/app/otteretto/id1608448950)

A unique puzzle game where players create palindromes using letters and otters. It offers multiple endlessly replayable game modes, including daily challenges and competitive leaderboards.

**Highlights:** Unique palindrome puzzle mechanics, Five endlessly replayable game modes, Daily global competition, Logical reasoning puzzles, Competitive cross-platform leaderboards, No ads or microtransactions

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Upgrade | $2.99 | one-time |


## Frequently asked questions

### Is Know Notes free?

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

### Is Otteretto free?

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

### Which has better reviews, Know Notes or Otteretto?

Otteretto is rated higher. Know Notes averages 4.9 out of 5 from 31 ratings, while Otteretto averages 5.0 from 8 ratings.

### Do Know Notes or Otteretto have ads?

Neither Know Notes nor Otteretto shows ads.

### Which is updated more often, Know Notes or Otteretto?

Know Notes ships an update fortnightly, and Otteretto every 9 months. Most recently, Know Notes was updated on November 3, 2026 and Otteretto on November 3, 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.*