# Ukulele by Ear vs R&D Guru

The clearest difference is price: R&D Guru at Free against Ukulele by Ear's $4.99. Ukulele by Ear's advantage is in-app purchases (none vs 1) and update cadence (every 3 months vs every 11 months). On ads there is nothing between them.

R&D Guru is free to download; Ukulele by Ear costs $4.99 up front. R&D Guru sells 1 one-off in-app purchase. Ukulele by Ear asks for nothing beyond the download.

Ukulele by Ear ships an update every 3 months, R&D Guru every 11 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Ukulele by Ear | R&D Guru |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 11 months |
| Size | 190 MB | 85 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Oleg Sokolov](https://appshunter.io/developer/1628122395) | [Mohammad Hasan](https://appshunter.io/developer/1840610284) |

## What reviewers say

### Ukulele by Ear

[App page](https://appshunter.io/ios/app/ukulele-by-ear/id1635675223)

**Features:** macOS Compatibility

**In-app purchases:** none


### R&D Guru

[App page](https://appshunter.io/ios/app/r-and-d-guru/id6753789430)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 20 Important Cosmetic Ingredients | $0.99 | one-time |


## Frequently asked questions

### Is Ukulele by Ear free?

Ukulele by Ear costs $4.99, with no in-app purchases.

### Is R&D Guru free?

R&D Guru is free to download, with in-app purchases available.

### Do Ukulele by Ear or R&D Guru have ads?

Neither Ukulele by Ear nor R&D Guru shows ads.

### Which is updated more often, Ukulele by Ear or R&D Guru?

Ukulele by Ear ships an update every 3 months, and R&D Guru every 11 months. Most recently, Ukulele by Ear was updated on November 7, 2026 and R&D Guru on October 30, 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.*