# Nixie Calculator vs Clef Converter

The clearest difference is rating: Nixie Calculator at 4.9 against Clef Converter's 3.8. Clef Converter's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 67%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Nixie Calculator sells 1 one-off in-app purchase. Clef Converter asks for nothing beyond the download.

Nixie Calculator holds the better App Store score, 4.9 against 3.8. Both are backed by a comparable volume of ratings — 15 and 11 respectively. Written reviews complicate that: 67% of Nixie Calculator's written reviews are positive against 100% of Clef Converter's, so the app with the better star average is not the one people write more warmly about.

Nixie Calculator ships an update monthly, Clef Converter every 5 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Nixie Calculator | Clef Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (15 ratings)](https://appshunter.io/ios/app/nixie-calculator/id1489019109/reviews)** | [3.8 (11 ratings)](https://appshunter.io/ios/app/clef-converter/id6749788690/reviews) |
| Number of ratings | **15** | 11 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 36 MB | 7 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [UNB SYSTEMS PTY LTD](https://appshunter.io/developer/1514057763) | [Daniel Vonrhein](https://appshunter.io/developer/1832125705) |

## What reviewers say

### Nixie Calculator

[App page](https://appshunter.io/ios/app/nixie-calculator/id1489019109)

This calculator app features a digital paper tape to display entries, which can be copied or shared. It offers various customization options like color schemes, rounding, and display modes, blending retro aesthetics with modern device technology.

**Highlights:** Paper tape for entry display, Copy and paste functionality, Customizable color schemes, Adjustable rounding and exponential modes, Classic Nixie font option, Thousand separator styles

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Color Layouts | $2.99 | one-time |


### Clef Converter

[App page](https://appshunter.io/ios/app/clef-converter/id6749788690)

Easily convert sheet music to your preferred clef using advanced computer vision. This app handles PDFs, screenshots, and camera photos, making it simpler to read music in new clefs. It's designed for musicians looking for a visual aid to overcome reading challenges.

**Highlights:** Automatic clef conversion, Supports PDFs, screenshots, and camera photos, Handles single or multiple staves, Visualizer for musicians, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nixie Calculator free?

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

### Is Clef Converter free?

Clef Converter is free to download, with no in-app purchases.

### Which has better reviews, Nixie Calculator or Clef Converter?

Nixie Calculator is rated higher. Nixie Calculator averages 4.9 out of 5 from 15 ratings, while Clef Converter averages 3.8 from 11 ratings.

### Do Nixie Calculator or Clef Converter have ads?

Neither Nixie Calculator nor Clef Converter shows ads.

### Which is updated more often, Nixie Calculator or Clef Converter?

Nixie Calculator ships an update monthly, and Clef Converter every 5 weeks. Most recently, Nixie Calculator was updated on October 24, 2026 and Clef Converter 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.*