PrimeCalc vs CalcuMem
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/
CalcuMem
This calculator app offers a unique approach to memory functions, allowing users to add comments and photos to saved calculations. It's designed for everyday use, from budgeting to loan analysis, with an enhanced interface for better performance.
- Editable memory buttons
- Comments for memory entries
- Photo attachments to memory
- Comprehensive memory storage
- Enhanced performance interface
- Everyday calculation tools
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CalcuMem reinvents the "Math to Memory" Interaction with its spectacular new look for enhanced performance! Introducing Editable Memory Buttons (with comments) that will forever retire the “MR”, “MC”, “M+” and “M-“ buttons. More Comprehensive Memory Storage (supporting the addition of comments and photos) will enhance saved choices and let you retrieve them when needed with a finger touch. These unique Memory Capabilities are ideal for handling your shopping activities, budget management, feasibility study, loan analysis and everyday calculations. Just let CalcuMem do the math for you!
Screenshots
Verdict
The clearest difference is in-app purchases: PrimeCalc at none against CalcuMem's 2. PrimeCalc also leads on update cadence (every 5 weeks vs every 3 months) and iOS requirement (12.0 vs 15.0). CalcuMem's advantage is ads (none vs shown). On price 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. CalcuMem sells 1 one-off in-app purchase. PrimeCalc asks for nothing beyond the download.
PrimeCalc ships an update every 5 weeks, CalcuMem every 3 months. The most recent releases landed on September 10, 2026 and September 15, 2026 respectively.
| Parameter | PrimeCalc | CalcuMem |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 12 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Yutaka Nakao | Mohamed Asser Reda |
In-app purchases
PrimeCalc
No in-app purchases
CalcuMem
- "Purchase 40 Rows"2 variants$3.99
