PrimeCalc vs Color Calc+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PrimeCalc
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--- PrimeCalc feature --- ■ Normal arithmetic operation (×, /, +, -) is available. ■ prime: integer calculation (Division remainder ÷, prime factorization p) can be done. (You can also exponentiate.) ■ auto: Automatic calculation, memory storage, history recording is possible. ■ global: Digit display of countries around the world is possible. （千、万、億、兆、京、垓、・・・） ■ iPhone / iPad is available. Free. We are displaying advertisements. Caution) In case of large number, calculation error etc. may occur. Please use it together with other calculator. If you have comments, questions, etc., please email or bulletin board. http: //www.eonet.ne.jp/~treechart/
Color Calc+
This utility app provides a straightforward calculator with a history of past computations. It also offers temperature conversion tools and the ability to easily copy the most recent result.
- Calculator
- Calculation history
- Temperature conversion
- Copy last result
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mColorCalc is a simple calculator that keeps history of past calculations. It also has temperature conversions and copy/paste of the last result.
Screenshots
Verdict
The clearest difference is ads: Color Calc+ at none against PrimeCalc's shown. Color Calc+ also leads on update cadence (weekly vs every 5 weeks). PrimeCalc's advantage is iOS requirement (12.0 vs 15.0). On price, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
PrimeCalc ships an update every 5 weeks, Color Calc+ weekly. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.
| Parameter | PrimeCalc | Color Calc+ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 weeks | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 12 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Yutaka Nakao | Jerry Watson |
In-app purchases
PrimeCalc
No in-app purchases
Color Calc+
No in-app purchases
