# Prime Factorization vs Count That Now

The clearest difference is review sentiment: Prime Factorization at 100% against Count That Now's 60%. Prime Factorization also leads on in-app purchases (none vs 1) and ads (none vs shown). Count That Now's advantage is ratings volume (5.5K vs 5) and rating (4.7 vs 4.4). On price, update cadence and device support there is nothing between them.

Both are free to download. Count That Now sells 1 one-off in-app purchase. Prime Factorization asks for nothing beyond the download.

Count That Now holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Count That Now has 5.5K 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 60% of Count That Now's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 15, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Prime Factorization | Count That Now |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/prime-factorization/id528980227/reviews) | **[4.7 (5.5K ratings)](https://appshunter.io/ios/app/count-that-now-tally-counter/id955952873/reviews)** |
| Number of ratings | 5 | **5.5K** |
| Positive reviews | **100.0% of reviews** | 59.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 18 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sohei Mori](https://appshunter.io/developer/528980270) | [Jarig Duval](https://appshunter.io/developer/539738096) |

## 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


### Count That Now

[App page](https://appshunter.io/ios/app/count-that-now-tally-counter/id955952873)

This application serves as a digital tally counter, offering a simple and reliable way to track multiple counts. It features customizable styles, alerts, and sounds to personalize your counting experience.

**Highlights:** Unlimited counters, Customizable counter styles, Set thresholds for alerts, Customizable alert and click sounds, Haptic feedback, Read out numbers

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Free | $12.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Responsive and fast
- 💡 Useful for various counting needs
- 🔒 No gimmicks or ads

**What reviewers complain about**

- 💰 Expensive ad-free version
- 🔁 Relentless upgrade pop-ups
- 🔋 Battery drain issues
- 🔍 Privacy concerns with data tracking

**Reported bugs**

- Occasional app crashes
- Inconsistent button responsiveness
- Restore purchase feature not working

**Requested features**

- Add dark mode option
- Include a reset button
- Allow customizing background color
- Improve multi-count management


## Frequently asked questions

### Is Prime Factorization free?

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

### Is Count That Now free?

Count That Now is free to download, with in-app purchases available.

### Which has better reviews, Prime Factorization or Count That Now?

Count That Now is rated higher. Prime Factorization averages 4.4 out of 5 from 5 ratings, while Count That Now averages 4.7 from 5.5K ratings.

### Do Prime Factorization or Count That Now have ads?

Count That Now shows ads; Prime Factorization does not.

### Which is updated more often, Prime Factorization or Count That Now?

Prime Factorization ships an update every 3 months, and Count That Now every 3 months. Most recently, Prime Factorization was updated on October 15, 2026 and Count That Now on October 29, 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.*