# PrimeCalc vs CalcuMem

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.

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 October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | PrimeCalc | CalcuMem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calcumem/id1507207055/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | — | Free |
| Size | 12 MB | 1 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Yutaka Nakao](https://appshunter.io/developer/1303008060) | [Mohamed Asser Reda](https://appshunter.io/developer/1506908645) |

## What reviewers say

### PrimeCalc

[App page](https://appshunter.io/ios/app/primecalc-modprime-factor/id1332239791)

**Features:** macOS Compatibility

**In-app purchases:** none


### CalcuMem

[App page](https://appshunter.io/ios/app/calcumem/id1507207055)

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.

**Highlights:** Editable memory buttons, Comments for memory entries, Photo attachments to memory, Comprehensive memory storage, Enhanced performance interface, Everyday calculation tools

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| "Purchase 40 Rows" | $3.99 | one-time |


## Frequently asked questions

### Is PrimeCalc free?

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

### Is CalcuMem free?

CalcuMem is free to download, with in-app purchases available.

### Do PrimeCalc or CalcuMem have ads?

PrimeCalc shows ads; CalcuMem does not.

### Which is updated more often, PrimeCalc or CalcuMem?

PrimeCalc ships an update every 5 weeks, and CalcuMem every 3 months. Most recently, PrimeCalc was updated on October 26, 2026 and CalcuMem on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*