Prime Factorization vs Counter+.
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".
Counter+.
A straightforward tally counter designed for ease of use. It allows you to track anything with simple tap controls, offering haptic feedback and sound cues for each count. Save, share, and resume your counting sessions with this versatile utility.
- Save counted records
- Share saved records
- Vibrates on each count
- Click sound on each count
- Speaks count every 25 increments
- Count up or down
- Resume last counted numbers
- Apple Watch compatibility
Read full descriptionHide full description
This is a simple counter that lets you keep track of anything. It has a perfect design with just three buttons for easy access. Features: * It can save counted records * You can share the saved counter records * It vibrates every count * it gives click sound every count * Every 25 count speaks the count * You can use to count up or count down in numbers *It remembers last counted numbers if you close app and then come back to it to resume counting * You can continue count on your Apple Watch
Screenshots
Verdict
The clearest difference is ads: Prime Factorization at none against Counter+.'s shown. Prime Factorization also leads on review sentiment (100% vs 84%) and monetization model (free vs ad-supported). Counter+.'s advantage is ratings volume (1.4K vs 5) and rating (4.7 vs 4.4). On price, update cadence and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Counter+. holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Counter+. has 1.4K 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 84% of Counter+.'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, Counter+. every 4 months. The most recent releases landed on October 15, 2026 and October 29, 2026 respectively.
| Parameter | Prime Factorization | Counter+. |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (5 ratings) | 4.7 (1.4K ratings) — better |
| Positive reviews | 100.0% of reviews — better | 84.2% of reviews |
| Number of ratings | 5 | 1.4K — better |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 8.0 — better | 12.1 |
| Further details — not scored | ||
| Size | 2 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Sohei Mori | UniCom Technology |
Customer experience
Prime Factorization
Counter+.
Bugs and requests
Prime Factorization
Not enough reviews yet to summarise bugs or requests.
Counter+.
Reported bugs
1 issue- Crashes at 1000 counts
Requested features
2 requests- Automatic counting feature
- Ability to remove ads
In-app purchases
Prime Factorization
No in-app purchases
Counter+.
No in-app purchases
Questions
Is Prime Factorization free?
Is Counter+. free?
Which has better reviews, Prime Factorization or Counter+.?
Do Prime Factorization or Counter+. have ads?
Which is updated more often, Prime Factorization or Counter+.?
Other comparisons
