# Chord vs Unit Circle Calculator PRO

Chord and Unit Circle Calculator PRO both sit at 4.8 stars, but that hides the real split: 100% of Unit Circle Calculator PRO's written reviews are positive against 57% of Chord's. Unit Circle Calculator PRO also leads on price ($1.99 vs $3.99). Chord's advantage is device support (5 vs 3) and ratings volume (81 vs 25). On rating, update cadence, ads and in-app purchases there is nothing between them.

Chord costs $3.99 and Unit Circle Calculator PRO $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for Chord against 4.7 for Unit Circle Calculator PRO. Both are backed by a comparable volume of ratings — 81 and 25 respectively. Written reviews are what separate them: 57% of Chord's written reviews are positive against 100% of Unit Circle Calculator PRO's.

Chord ships an update every 4 weeks, Unit Circle Calculator PRO monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Chord | Unit Circle Calculator PRO |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Rating | **[4.8 (81 ratings)](https://appshunter.io/ios/app/chord/id1500126852/reviews)** | [4.7 (25 ratings)](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541/reviews) |
| Number of ratings | **81** | 25 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | Paid | Paid |
| Size | 46 MB | 181 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Roman Sevastyanov](https://appshunter.io/developer/1448837134) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Chord

[App page](https://appshunter.io/ios/app/chord/id1500126852)

Unlock musical creativity with a suite of tools for composing and practicing. Generate chord progressions, practice notation, train your ear, and even use your device as a MIDI keyboard. Includes a macOS version for seamless integration.

**Highlights:** Chord progression generation with inversions and extensions, Live playback as piano or synth, MIDI output to macOS, Guitar chord finder, Notation reading practice, Ear training for intervals and voice, macOS version included

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### Unit Circle Calculator PRO

[App page](https://appshunter.io/ios/app/unit-circle-calculator-pro/id1606376541)

Visualize and understand the unit circle with step-by-step calculations, diagrams, and animations. Supports various input formats including negative values, decimals, fractions, and pi. Save, share, and revisit past calculations.

**Highlights:** Unit circle visualization, Step-by-step calculation, Diagrams and animations, Supports negative values, decimals, fractions, and π, Calculation history, Shareable solutions

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

**In-app purchases:** none


## Frequently asked questions

### Is Chord free?

Chord costs $3.99, with no in-app purchases.

### Is Unit Circle Calculator PRO free?

Unit Circle Calculator PRO costs $1.99, with no in-app purchases.

### Which has better reviews, Chord or Unit Circle Calculator PRO?

Chord is rated higher. Chord averages 4.8 out of 5 from 81 ratings, while Unit Circle Calculator PRO averages 4.7 from 25 ratings.

### Do Chord or Unit Circle Calculator PRO have ads?

Neither Chord nor Unit Circle Calculator PRO shows ads.

### Which is updated more often, Chord or Unit Circle Calculator PRO?

Chord ships an update every 4 weeks, and Unit Circle Calculator PRO monthly. Most recently, Chord was updated on October 24, 2026 and Unit Circle Calculator PRO on October 24, 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.*