Basic Calc Plus vs PrimeCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Basic Calc Plus
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It is a calculator app basic for the iPhone. Set of sound and color settings, can be turned on and off of the consumption tax calculation. [Function] Four arithmetic operations % Calculation Memory facility 12-digit display Consumption tax calculation [Settings] Color: blue, yellow, red, green Sound: Normal, coins, punch, mute Consumption tax: ON, OFF Consumption tax rate:%
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/
Screenshots
Verdict
The clearest difference is update cadence: PrimeCalc at every 5 weeks against Basic Calc Plus's every 17 months. PrimeCalc also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.6). On price, ads and in-app purchases 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.
Basic Calc Plus ships an update every 17 months, PrimeCalc every 5 weeks. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.
| Parameter | Basic Calc Plus | PrimeCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 17 months | Every 5 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Osamu Ishigami | Yutaka Nakao |
In-app purchases
Basic Calc Plus
No in-app purchases
PrimeCalc
No in-app purchases
Questions
Is Basic Calc Plus free?
Is PrimeCalc free?
Do Basic Calc Plus or PrimeCalc have ads?
Which is updated more often, Basic Calc Plus or PrimeCalc?
Other comparisons
