N'Back Fan vs CheckPrimeNumbers
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
N'Back Fan
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Improve Sensory Memory & Working Memory using N'Back. Tap the number key matches the one from N steps earlier in the sequence. In 1'Back 1 task1: count & memorize 2 task2: count & memorize 3 __keyboard__: answer for task1 4 task3: count & memorize 5 __keyboard__: answer for task2 6 task4: count & memorize : In 2'Back 1 task1: count & memorize 2 task2: count & memorize 3 task3: count & memorize 4 __keyboard__: answer for task1 5 task4: count & memorize 6 __keyboard__: answer for task2 7 task5: count & memorize : [details] https://app.brain-workout.org/nbackfan-e/
CheckPrimeNumbers
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Input numbers into this app to find out if the numbers are prime or not. The app also displays all the factors of the input numbers.
Screenshots
Verdict
The clearest difference is price: N'Back Fan at Free against CheckPrimeNumbers's $0.99. CheckPrimeNumbers's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement 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
N'Back Fan is free to download; CheckPrimeNumbers costs $0.99 up front. N'Back Fan sells 1 one-off in-app purchase. CheckPrimeNumbers asks for nothing beyond the download.
| Parameter | N'Back Fan | CheckPrimeNumbers |
|---|---|---|
| Price | Free — better | $0.99 |
| Update frequency | Every 9 months | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuyoshi Ota | Sreekanth Parigela |
In-app purchases
N'Back Fan
- remove ads and extend to 12$1.99
CheckPrimeNumbers
No in-app purchases
Questions
Is N'Back Fan free?
Is CheckPrimeNumbers free?
Do N'Back Fan or CheckPrimeNumbers have ads?
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