Prime Factors vs Prime Cracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prime Factors
Explore numbers up to one trillion, with primes clearly marked. Tap any number to reveal its prime factors. Easily navigate to specific numbers using the search function and adjust the display with pinch-to-zoom gestures.
- View numbers up to 1 trillion
- Prime numbers highlighted
- Tap for prime factors
- Search for specific numbers
- Pinch and zoom display
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View all numbers from 1 to 1,000,000,000,000. Prime numbers shown with a red circle. Tap a number to see its Prime Factors. Jump directly to a number with the search field. • Prime Numbers are marked with a red circle • Prime Factors can be viewed by tapping on a number • Pinch and Zoom to change the number of columns
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 price: Prime Cracker at Free against Prime Factors's $0.99. Prime Cracker also leads on rating (4.9 vs 3.9) and update cadence (every 2 weeks vs every 21 months). On ratings volume, ads, in-app purchases and monetization model 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
Prime Cracker is free to download; Prime Factors costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Prime Cracker holds the better App Store score, 4.9 against 3.9. Both are backed by a comparable volume of ratings — 24 and 31 respectively. Written reviews point the same way: 79% of Prime Factors's written reviews are positive against 100% of Prime Cracker's.
Prime Factors ships an update every 21 months, Prime Cracker every 2 weeks. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.
| Parameter | Prime Factors | Prime Cracker |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.9 (24 ratings) | 4.9 (31 ratings) — better |
| Positive reviews | 78.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 24 | 31 — better |
| Update frequency | Every 21 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Hangas | Sven Freitag |
Customer experience
Prime Factors
Prime Cracker
In-app purchases
Prime Factors
No in-app purchases
Prime Cracker
No in-app purchases
Questions
Is Prime Factors free?
Is Prime Cracker free?
Which has better reviews, Prime Factors or Prime Cracker?
Do Prime Factors or Prime Cracker have ads?
Which is updated more often, Prime Factors or Prime Cracker?
Other comparisons
