N2x3x5x7x vs Smart Calc+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
N2x3x5x7x
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Is your telephone number prime ? Or your Birthday ?? N2x3x5x7x will show the prime factors for any number up to 10,000,000,000. It will also convert any number from/to any base 2 to 16. Use N2x3x5x7x, with its unique spiral keyboard, to explore the natural numbers and see if you can find primes, or perhaps a surreal pattern... N2x3x5x7x, an infinitesimal contribution to Number Theory
Smart Calc+
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Your ultimate tool for basic algebra, trigonometry (sin, cos), logarithms (log), and more. Perform quick and accurate calculations with a built-in history log to keep track of all your calculations.
Screenshots
Verdict
The clearest difference is update cadence: Smart Calc+ at every 3 days against N2x3x5x7x's every 23 months. N2x3x5x7x's advantage is iOS requirement (9.0 vs 13.4). 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.
N2x3x5x7x ships an update every 23 months, Smart Calc+ every 3 days. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.
| Parameter | N2x3x5x7x | Smart Calc+ |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 23 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 15 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | DaliFermat Ltd | Rahman Usta |
In-app purchases
N2x3x5x7x
No in-app purchases
Smart Calc+
No in-app purchases
