Adam's Calc vs PrimeCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Adam's Calc
A utility calculator that adds memory functionality to standard calculations. Designed to make your device's calculator more helpful by remembering previous results.
- Memory function for calculations
- Enhanced utility calculator
- Intuitive design
- Remembers previous results
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Adam's Calc is a utility calculator designed by rdConcepts. This design is intended to help make the standard calculator more useful by building some "memory" into the device. Inspiration -> Donald Norman.
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 in-app purchases: PrimeCalc at none against Adam's Calc's 1. PrimeCalc also leads on update cadence (every 5 weeks vs every 4 months) and iOS requirement (12.0 vs 15.0). On price, ads 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. Adam's Calc sells 1 one-off in-app purchase. PrimeCalc asks for nothing beyond the download.
Adam's Calc ships an update every 4 months, PrimeCalc every 5 weeks. The most recent releases landed on October 9, 2026 and October 26, 2026 respectively.
| Parameter | Adam's Calc | PrimeCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | RD Concepts | Yutaka Nakao |
In-app purchases
Adam's Calc
- Remove Advertising$2.99
PrimeCalc
No in-app purchases
