# Prime Factorization vs Prime Factors +Calc

The clearest difference is update cadence: Prime Factors +Calc at every 6 days against Prime Factorization's every 3 months. Prime Factorization's advantage is iOS requirement (8.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Prime Factorization ships an update every 3 months, Prime Factors +Calc every 6 days. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Prime Factorization | Prime Factors +Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/prime-factorization/id528980227/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 2 MB | 1 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sohei Mori](https://appshunter.io/developer/528980270) | [Kazuaki Oshiba](https://appshunter.io/developer/1813699478) |

## What reviewers say

### Prime Factorization

[App page](https://appshunter.io/ios/app/prime-factorization/id528980227)

This utility app breaks down integers into their prime factors. It also calculates the number and sum of divisors, lists all divisors, and identifies specific number types like prime, perfect, abundant, or deficient.

**Highlights:** Prime factorization of integers, Calculate number of divisors, Sum of divisors calculation, List all divisors, Identify prime numbers, Identify perfect, abundant, deficient numbers

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Prime Factors +Calc

[App page](https://appshunter.io/ios/app/prime-factors-plus-calc/id6745752731)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Prime Factorization free?

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

### Is Prime Factors +Calc free?

Prime Factors +Calc is free to download, with no in-app purchases.

### Do Prime Factorization or Prime Factors +Calc have ads?

Neither Prime Factorization nor Prime Factors +Calc shows ads.

### Which is updated more often, Prime Factorization or Prime Factors +Calc?

Prime Factorization ships an update every 3 months, and Prime Factors +Calc every 6 days. Most recently, Prime Factorization was updated on October 15, 2026 and Prime Factors +Calc on October 1, 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.*