Comparison

PrimeCalc vs KuCalc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

PrimeCalc

record the formula and results

Calculator with history

Free

🔧 Utilities

No ratingsView app →

About

PrimeCalc

Features

Read full description

--- 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/

About

KuCalc

Features

Read full description

It is a calculator with basic functions. We pursued ease of use with a minimum number of buttons. It has a history function. It can copy the results to clipboard.

Screenshots

PrimeCalc1 screens

KuCalc1 screens

Verdict

The call

The clearest difference is ads: KuCalc at none against PrimeCalc's shown. PrimeCalc's advantage is update cadence (every 5 weeks vs every 3 months). On price, in-app purchases, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PrimeCalc ships an update every 5 weeks, KuCalc every 3 months. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.

Scorecard2 real differences · 4 level

PrimeCalc versus KuCalc: the parameters behind the verdict, then further details
Parameter	PrimeCalc	KuCalc
Price	Free	Free
Update frequency	Every 5 weeks — better	Every 3 months
Ads	Yes	No — better
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	12.0	11.0 — better
Further details — not scored
Size	12 MB	1 MB
Age rating	4+	17+
Developer	Yutaka Nakao	Mineaki Sakatoku

In-app purchases

None

PrimeCalc

No in-app purchases

None

KuCalc

No in-app purchases

Questions

Is PrimeCalc free?

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

Is KuCalc free?

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

Do PrimeCalc or KuCalc have ads?

PrimeCalc shows ads; KuCalc does not.

Which is updated more often, PrimeCalc or KuCalc?

PrimeCalc ships an update every 5 weeks, and KuCalc every 3 months. Most recently, PrimeCalc was updated on September 10, 2026 and KuCalc on September 20, 2026.