# Prime Factorization vs Calculator HD Pro Lite

The clearest difference is ads: Prime Factorization at none against Calculator HD Pro Lite's shown. Prime Factorization also leads on review sentiment (100% vs 77%) and monetization model (free vs ad-supported). Calculator HD Pro Lite's advantage is ratings volume (52K vs 5) and rating (4.6 vs 4.4). On price, update cadence, 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.

Calculator HD Pro Lite holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Calculator HD Pro Lite has 52K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 100% of Prime Factorization's written reviews are positive against 77% of Calculator HD Pro Lite's, so the app with the better star average is not the one people write more warmly about.

Prime Factorization ships an update every 3 months, Calculator HD Pro Lite every 2 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Prime Factorization | Calculator HD Pro Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/prime-factorization/id528980227/reviews) | **[4.6 (52K ratings)](https://appshunter.io/ios/app/calculator-hd-pro-lite/id571121141/reviews)** |
| Number of ratings | 5 | **52K** |
| Positive reviews | **100.0% of reviews** | 77.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 2 MB | 47 MB |
| Requires iOS | **8.0** | 15.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sohei Mori](https://appshunter.io/developer/528980270) | [Cider Software LLC](https://appshunter.io/developer/465180756) |

## 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


### Calculator HD Pro Lite

[App page](https://appshunter.io/ios/app/calculator-hd-pro-lite/id571121141)

This app offers a user-friendly calculator with large buttons and extensive customization options. It features a dual-line display to see input and results simultaneously, saves your calculation history, and provides full scientific functions. Personalize layouts, themes, and even button symbols to suit your needs.

**Highlights:** Dual-line display, Calculation history, Full scientific functions, Customizable layouts and themes, Big buttons, Email history

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 📝 Keeps calculation history
- 💡 Customizable layout and themes
- 🔢 Large, clear numbers
- 🧮 Variety of functions (basic, scientific, etc.)

**What reviewers complain about**

- 💢 Intrusive ads, especially between calculations
- 🙄 Ads that are difficult to close
- 🤦‍♂️ Ads that interrupt workflow
- 🤑 Expensive to remove ads
- 🚫 Gambling ads

**Reported bugs**

- Calculation errors with very large numbers
- Crashes after recent update
- Decimal point displayed as comma

**Requested features**

- Dark mode option
- Ability to sync calculation history across devices
- More advanced math functions (e.g. dms/dd)
- Customizable button layout
- Ability to disable ads without paying


## Frequently asked questions

### Is Prime Factorization free?

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

### Is Calculator HD Pro Lite free?

Calculator HD Pro Lite is free to download, with no in-app purchases.

### Which has better reviews, Prime Factorization or Calculator HD Pro Lite?

Calculator HD Pro Lite is rated higher. Prime Factorization averages 4.4 out of 5 from 5 ratings, while Calculator HD Pro Lite averages 4.6 from 52K ratings.

### Do Prime Factorization or Calculator HD Pro Lite have ads?

Calculator HD Pro Lite shows ads; Prime Factorization does not.

### Which is updated more often, Prime Factorization or Calculator HD Pro Lite?

Prime Factorization ships an update every 3 months, and Calculator HD Pro Lite every 2 months. Most recently, Prime Factorization was updated on October 15, 2026 and Calculator HD Pro Lite on October 24, 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.*