PrimeCalc vs Binary Calculator SDG
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/
Binary Calculator SDG
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The binary calculator is a powerful tool that allows users to easily add, subtract, divide, and multiply binary numbers, making complex calculations fast and efficient.
Screenshots
Verdict
The clearest difference is update cadence: PrimeCalc at every 5 weeks against Binary Calculator SDG's every 12 months. On price, ads, 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, Binary Calculator SDG every 12 months. The most recent releases landed on September 10, 2026 and September 14, 2026 respectively.
| Parameter | PrimeCalc | Binary Calculator SDG |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks — better | Every 12 months |
| Ads | Yes | Yes |
| 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 | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Yutaka Nakao | SDG CODE DOO NIS |
In-app purchases
PrimeCalc
No in-app purchases
Binary Calculator SDG
No in-app purchases
Questions
Is PrimeCalc free?
Is Binary Calculator SDG free?
Do PrimeCalc or Binary Calculator SDG have ads?
Which is updated more often, PrimeCalc or Binary Calculator SDG?
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