Prime Factorization vs Count That Now
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prime Factorization
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.
- Prime factorization of integers
- Calculate number of divisors
- Sum of divisors calculation
- List all divisors
- Identify prime numbers
- Identify perfect, abundant, deficient numbers
Read full descriptionHide full description
This app factorize inputted integer to primes. You can input and factorize any integers under 100 million. App will show below result. * The result of prime factorization * The number of divisors * The sum total of divisors * All Divisors In addition, you can know which inputted number is "Prime number", "Perfect Number", "Multipru Perfect Number", "Abundant Number"or "Dificient Number".
Count That Now
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.
- Unlimited counters
- Customizable counter styles
- Set thresholds for alerts
- Customizable alert and click sounds
- Haptic feedback
- Read out numbers
Read full descriptionHide full description
Just the App you need if you need a tally counter! *** The perfect PEOPLE COUNTER *** Simple. Reliable. FREE. WHY USE COUNT THAT NOW: • ALL features for FREE • Simple interface • Reliable • Customizable Counter Styles (from 'Classic' over 'Big Plus Button' to 'Ergonomic with Thumb Rest') • UNLIMITED counters • Count directly in list • Sort counters by Title, Value, Creation Date, Last Edited, or Last Looked At • Set counter titles • Set numbers directly (negative numbers possible) • Set thresholds for Min/Max Alerts • Customizable Alert Sounds (Separate sounds per counter possible) • Customizable Click Sounds (Separate sounds for [+] and [-] and per counter possible) • Haptic Feedback (optional) • Read out numbers (optional) • Orientation Lock (optional) • Screen always on (optional) COUNT YOUR WAY: • Count without even looking thanks to ergonomically placed buttons, haptic feedback, click sounds, threshold alerts, and numbers read out loud (all optional). • If you prefer the classic design, an extra large plus-button, ergonomically placed buttons (with or without thumb rest) - we've got you covered with our Counter Styles. • Need more Counter Styles? Contact us: support.count-that-now@tooltaps.com Simple and efficient! COUNT THAT NOW *** Let us know how you're enjoying Count That Now, or give us your suggestions: support.count-that-now@tooltaps.com If Count That Now is helping you, we would appreciate an App Store review. Your review will help other people find Count That Now and let them turn their iPhone into a tally counter too.
Screenshots
Verdict
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.
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. 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.
| Parameter | Prime Factorization | Count That Now |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (5 ratings) | 4.7 (5.5K ratings) — better |
| Positive reviews | 100.0% of reviews — better | 59.7% of reviews |
| Number of ratings | 5 | 5.5K — better |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 2 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Sohei Mori | Jarig Duval |
Customer experience
Prime Factorization
Count That Now
Bugs and requests
Prime Factorization
Not enough reviews yet to summarise bugs or requests.
Count That Now
Reported bugs
3 issues- Occasional app crashes
- Inconsistent button responsiveness
- Restore purchase feature not working
Requested features
4 requests- Add dark mode option
- Include a reset button
- Allow customizing background color
- Improve multi-count management
In-app purchases
Prime Factorization
No in-app purchases
Count That Now
- Ad Free$12.99
Questions
Is Prime Factorization free?
Is Count That Now free?
Which has better reviews, Prime Factorization or Count That Now?
Do Prime Factorization or Count That Now have ads?
Which is updated more often, Prime Factorization or Count That Now?
Other comparisons















