Kalc vs Color Convertor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kalc
This utility app offers a unit converter, calculator, and world clock. Its user-friendly interface is designed for quick access to everyday calculations and conversions.
- Unit converter
- Calculator
- World clock
- Simple UI
- Quick results
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Unit Converter, Calculator, and World Clock. The simple & clean UI to get the results you need for everyday use as quickly as possible.
Color Convertor
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Hello, I am an iOS application engineer in Japan. Everyday I work with various people such as designers and planners. One of the many instructions by the designer's designation is color designation. For example, the theme color of this application is "#9CAEB7". This color is the same as the line color of Japanese subway, "Hibiya line". Just by looking at this, I do not know what color it is. And in implementing it, our iOS application engineers have to generate program code for Objective-C and Swift. So I made this App. You can see what color it is in full screen display. At the same time, you are able to generate program code, so you just send it to Mac with any sharing method you like. This app is written in modern Swift 5 produced by Apple. As a latest technology, I implemented Peek & Pop of 3D Touch. Please try pressing the color part after conversion. Full screen display is possible as it is. I think that there are users who use iPhone which is not compatible with 3D Touch so I made it possible to tap. There is still room for additional functions. I plan to find the gap time of other projects and add useful functions. If you find a bug or you would like to suggest adding functionality, please send feedback from the Settings Tab. From iOS 13, you can use this app with dark mode! Please enjoy! Thank you very much for your downloading at the end.
Screenshots
Verdict
The clearest difference is in-app purchases: Kalc at none against Color Convertor's 1. Kalc also leads on update cadence (every 9 days vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Color Convertor sells 1 one-off in-app purchase. Kalc asks for nothing beyond the download.
Kalc ships an update every 9 days, Color Convertor every 6 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | Kalc | Color Convertor |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 96.2% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 9 days — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | YUTA OKAJIMA | Takuya Aso |
In-app purchases
Kalc
No in-app purchases
Color Convertor
- RemoveAd$0.99









