# Clef Trainer Grid vs Vector3D

The clearest difference is price: Vector3D at Free against Clef Trainer Grid's $2.99. Clef Trainer Grid's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Vector3D is free to download; Clef Trainer Grid costs $2.99 up front. Vector3D sells 1 one-off in-app purchase. Clef Trainer Grid asks for nothing beyond the download.

## The numbers

| Metric | Clef Trainer Grid | Vector3D |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (12 ratings)](https://appshunter.io/ios/app/clef-trainer-grid/id6749281721/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Daily | — |
| Monetization | Paid | — |
| Size | 3 MB | 12 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [John Andersen](https://appshunter.io/developer/1829819109) | [Tin Chi Chan](https://appshunter.io/developer/6779461216) |

## What reviewers say

### Clef Trainer Grid

[App page](https://appshunter.io/ios/app/clef-trainer-grid/id6749281721)

Master sheet music reading across multiple clefs. Practice note input via touch, MIDI keyboard, or microphone. Features a unique grid input to ensure genuine learning, not just muscle memory.

**Highlights:** Treble, alto, and bass clef support, Major and minor key signature support, Accidental support, Adjustable ledger lines, Grid input for muscle memory prevention, MIDI keyboard and microphone input, Cheat Mode for real-time note names

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

**In-app purchases:** none


### Vector3D

[App page](https://appshunter.io/ios/app/vector3d-math-plotter/id6779461214)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $0.99 | one-time |


## Frequently asked questions

### Is Clef Trainer Grid free?

Clef Trainer Grid costs $2.99, with no in-app purchases.

### Is Vector3D free?

Vector3D is free to download, with in-app purchases available.

### Do Clef Trainer Grid or Vector3D have ads?

Neither Clef Trainer Grid nor Vector3D shows ads.

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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.*