Bubbly Primes

$3.99, Apple App Store

Teaches: math, prime numbers

CTR Rating: 86%

CTR Review

Do you know the factors of 117? (Hint, just ask your smart speaker. You'll learn they are 1, 3, 9, 13 and 39). This simple app asks you to tap rising numeral bubbles to break them into their factors. Be careful however, because some bubbles are already primes. If you make a bad choice your score goes down. The design isn't fancy but it works. Created by Xaman Kryger in Unity.