Prime Factorization vs isPrime?
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
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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".
isPrime?
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It's a fast prime number checker.
Screenshots
Verdict
The clearest difference is update cadence: isPrime? at daily against Prime Factorization's every 3 months. Prime Factorization's advantage is iOS requirement (8.0 vs 15.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Prime Factorization ships an update every 3 months, isPrime? daily. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.
| Parameter | Prime Factorization | isPrime? |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Sohei Mori | Omer Faruk Mesebuken |
In-app purchases
Prime Factorization
No in-app purchases
isPrime?
No in-app purchases
Questions
Is Prime Factorization free?
Is isPrime? free?
Do Prime Factorization or isPrime? have ads?
Which is updated more often, Prime Factorization or isPrime??
Other comparisons
