Divisors vs isPrime?
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Divisors
Read full descriptionHide full description
This app can tell you if a number between 0 and 20000 is prime or not. It can also determine all divisors of any number less than 10000000. Fancy a game? Then you can try the quiz and collect points. Siri Shortcuts are also supported: You can also use your shortcuts to check whether your number is a prime number or not. Another shortcut can give you all the prime numbers from 0 to your entered number in a list. A shortcut can be used to determine all divisors of any number less than 100000, so the shortcut doesn't take too long.
isPrime?
Read full descriptionHide full description
It's a fast prime number checker.
Screenshots
Verdict
The clearest difference is update cadence: isPrime? at daily against Divisors's weekly. 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.
Divisors ships an update weekly, isPrime? daily. Both last shipped on October 7, 2026.
| Parameter | Divisors | isPrime? |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | DORU SULAR | Omer Faruk Mesebuken |
In-app purchases
Divisors
No in-app purchases
isPrime?
No in-app purchases
