# Chord Calculus vs DroPilot Pentatonics

The clearest difference is price: DroPilot Pentatonics at Free against Chord Calculus's $2.99. DroPilot Pentatonics also leads on update cadence (every 5 days vs fortnightly) and iOS requirement (13.0 vs 16.0). Chord Calculus's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

DroPilot Pentatonics is free to download; Chord Calculus costs $2.99 up front. DroPilot Pentatonics sells 1 one-off in-app purchase. Chord Calculus asks for nothing beyond the download.

Chord Calculus ships an update fortnightly, DroPilot Pentatonics every 5 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Chord Calculus | DroPilot Pentatonics |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.9 (8 ratings)](https://appshunter.io/ios/app/chord-calculus/id1239631425/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Paid | — |
| Size | 64 MB | 74 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Steven Pollack](https://appshunter.io/developer/1239631424) | [Pablo Niveiro](https://appshunter.io/developer/1895924412) |

## What reviewers say

### Chord Calculus

[App page](https://appshunter.io/ios/app/chord-calculus/id1239631425)

This app helps musicians visualize and understand chords, scales, and progressions for various fretted instruments. It allows customization of instruments, tunings, and capos, and includes a tuner. Play chords, arpeggios, and scales.

**Highlights:** Chord calculator with fingering display, Chord identifier for unknown fingerings, Scale display and playback, Chord progression player, Custom instrument and tuning creation, Capo support, Instrument tuner

**In-app purchases:** none


### DroPilot Pentatonics

[App page](https://appshunter.io/ios/app/dropilot-pentatonics/id6791123426)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DroPilot Pentatonics Pro | $4.99 | one-time |


## Frequently asked questions

### Is Chord Calculus free?

Chord Calculus costs $2.99, with no in-app purchases.

### Is DroPilot Pentatonics free?

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

### Do Chord Calculus or DroPilot Pentatonics have ads?

DroPilot Pentatonics shows ads; Chord Calculus does not.

### Which is updated more often, Chord Calculus or DroPilot Pentatonics?

Chord Calculus ships an update fortnightly, and DroPilot Pentatonics every 5 days. Most recently, Chord Calculus was updated on October 24, 2026 and DroPilot Pentatonics on October 28, 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.*