Prime Checker vs Prime Cracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prime Checker
This app performs advanced mathematical calculations for numbers, including integer factorization, Euler's totient function, and solving specific Diophantine equations. It utilizes advanced algorithms for factorization and primality testing.
- Integer factorization
- Euler's totient function
- Primitive root calculation
- Diophantine equation solver
- Primality testing
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This application calculate values of given number which are described below: * Integer factorization * Euler's totient function * Primitive root (if exist) * x, y where x^2 + y^2 = p if p is 4n+1 * x, y where x^2 + 3y^2 = p if p is 3n+1 * x, y where x^2 + 2y^2 = p if p is 8n+1 or 8n+3 * x, y where x^2 - 2y^2 = p if p is 8n+1 or 8n+7 This application uses Fermat algorithm, Pollard's rho algorithm and Lenstra's ECM for factorization, Miller–Rabin algorithm for primality test
Prime Cracker
This app helps users explore the fascinating world of prime numbers. It allows you to check if a number is prime, find its factors, and discover nearby primes. You can also analyze ranges of numbers for primes and twin primes.
- Determine primality and factors
- Find prime position
- Explore nearby primes
- Check number ranges for primes
- Identify twin primes
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• Determine a number's primality, factors or prime position • Explore nearby prime numbers conveniently • Check ranges of numbers for primes and twin primes
Screenshots
Verdict
The clearest difference is update cadence: Prime Cracker at every 2 weeks against Prime Checker's every 17 months. Prime Cracker also leads on ratings volume (31 vs 3). Prime Checker's advantage is iOS requirement (12.4 vs 15.0). On price, rating, review sentiment and ads 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.
On the App Store both sit at effectively the same score — 5.0 for Prime Checker against 4.9 for Prime Cracker. That said, the two scores are not equally well evidenced: Prime Cracker has 31 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 96% of Prime Checker's written reviews are positive against 100% of Prime Cracker's.
Prime Checker ships an update every 17 months, Prime Cracker every 2 weeks. The most recent releases landed on August 29, 2026 and September 9, 2026 respectively.
| Parameter | Prime Checker | Prime Cracker |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 4.9 (31 ratings) |
| Positive reviews | 95.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 31 — better |
| Update frequency | Every 17 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 12.4 — better | 15.0 |
| Further details — not scored | ||
| Size | 3 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Heart Solutions, Inc. | Sven Freitag |
Customer experience
Prime Checker
Prime Cracker
In-app purchases
Prime Checker
No in-app purchases
Prime Cracker
No in-app purchases
Questions
Is Prime Checker free?
Is Prime Cracker free?
Which has better reviews, Prime Checker or Prime Cracker?
Do Prime Checker or Prime Cracker have ads?
Which is updated more often, Prime Checker or Prime Cracker?
Other comparisons
