Is it Prime? vs isPrime?
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Is it Prime?
Enter any number to instantly determine if it is a prime number or not. This straightforward utility provides a quick answer to your mathematical curiosity.
- Prime number identification
- Simple number input
- Instant yes/no results
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This application serves only one function - to satisfy your curiosity when you wonder whether a given number is prime or not. You put in the number, it says yes or no. Really, that's all it does.
isPrime?
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It's a fast prime number checker.
Screenshots
Verdict
The clearest difference is update cadence: isPrime? at every 16 months against Is it Prime?'s every 74 months. 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.
Is it Prime? ships an update every 74 months, isPrime? every 16 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.
| Parameter | Is it Prime? | isPrime? |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (5 ratings) — better | — |
| Positive reviews | 71.4% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 74 months | Every 16 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Wismar | Omer Faruk Mesebuken |
In-app purchases
Is it Prime?
No in-app purchases
isPrime?
No in-app purchases
