# Fret Drill vs Calvin Chess Trainer

The clearest difference is in-app purchases: Calvin Chess Trainer at none against Fret Drill's 2. Calvin Chess Trainer also leads on update cadence (every 5 days vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Fret Drill sells 2 in-app purchases, starting at $1.99 per 7 days. Calvin Chess Trainer asks for nothing beyond the download.

Fret Drill ships an update every 2 months, Calvin Chess Trainer every 5 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Fret Drill | Calvin Chess Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fret-drill-learn-guitar-notes/id6759346882/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 15 MB | 170 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrii Sievrikov](https://appshunter.io/developer/1568000284) | [DAVID MARKLE](https://appshunter.io/developer/1880745263) |

## What reviewers say

### Fret Drill

[App page](https://appshunter.io/ios/app/fret-drill-learn-guitar-notes/id6759346882)

Learn guitar notes by playing your actual instrument. The app listens via your microphone and provides instant feedback, guiding you from basic exercises to mastering the entire fretboard. Turn memorization into muscle memory with focused daily practice.

**Highlights:** Practice with your real guitar, Instant microphone note detection, Step-by-step lessons, Smart practice repeating weak spots, Progress tracking, Customizable lessons

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $1.99 | per 7 days |
| Yearly Plan | $29.99 | per year |


### Calvin Chess Trainer

[App page](https://appshunter.io/ios/app/calvin-chess-trainer/id6759800929)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fret Drill free?

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

### Is Calvin Chess Trainer free?

Calvin Chess Trainer is free to download, with no in-app purchases.

### Do Fret Drill or Calvin Chess Trainer have ads?

Neither Fret Drill nor Calvin Chess Trainer shows ads.

### Which is updated more often, Fret Drill or Calvin Chess Trainer?

Fret Drill ships an update every 2 months, and Calvin Chess Trainer every 5 days. Most recently, Fret Drill was updated on October 24, 2026 and Calvin Chess Trainer on October 19, 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.*