# Color Expert! vs Calctan

The clearest difference is price: Calctan at Free against Color Expert!'s $0.99. Calctan also leads on ads (none vs shown). Color Expert!'s advantage is review sentiment (50% vs 29%) and iOS requirement (12.0 vs 16.6). On update cadence, in-app purchases and device support there is nothing between them.

Calctan is free to download; Color Expert! costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Color Expert! | Calctan |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.5 (61 ratings)](https://appshunter.io/ios/app/calctan/id1445480535/reviews)** |
| Number of ratings | — | **61** |
| Positive reviews | **50.0% of reviews** | 28.6% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | **Free** |
| Size | 17 MB | 9 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [竞尘 胡](https://appshunter.io/developer/958918034) | [Jorge Lozada](https://appshunter.io/developer/421852863) |

## What reviewers say

### Color Expert!

[App page](https://appshunter.io/ios/app/color-expert/id1099610513)

Easily convert color values between HEX, RGB, HSB, and CMYK formats. Input your color values and instantly see the corresponding information displayed. This utility is designed for users who frequently work with or prefer HSB color conversions.

**Highlights:** HEX to RGB conversion, RGB to HSB conversion, HSB to CMYK conversion, CMYK to HEX conversion, Real-time color info display, User-friendly interface

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

**In-app purchases:** none


### Calctan

[App page](https://appshunter.io/ios/app/calctan/id1445480535)

This app offers a high-precision scientific and financial calculator with an editable tape for auditing calculations. It supports complex formulas, a wide range of mathematical functions, and customizable constants, all within an ad-free, private interface.

**Highlights:** Smart formula workspace with direct cursor editing, Advanced scientific engine with true order of operations, Auditable calculation history on a digital tape, Exportable reports via AirPrint and PDF, Multitasking support for iPad, iCloud synchronization across devices, Private and ad-free experience

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

**In-app purchases:** none


## Frequently asked questions

### Is Color Expert! free?

Color Expert! costs $0.99, with no in-app purchases.

### Is Calctan free?

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

### Do Color Expert! or Calctan have ads?

Color Expert! shows ads; Calctan does not.

### Which is updated more often, Color Expert! or Calctan?

Color Expert! ships an update every 3 months, and Calctan every 3 months. Most recently, Color Expert! was updated on November 2, 2026 and Calctan on November 6, 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.*