Show HN: I built a highly customizable mental arithmetic trainer for iOS
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No Sign-Ups. Just Math.

Free · In‑App Purchases

Build math fluency without distractions, accounts, or ads. Mental math keeps your brain sharp. And it’s useful! Most mental math apps either lack simplicity or customizability, so I built Athena Math to fill this niche. Here are the main features of Athena Math: 1. Mix and match numbers with different digits For example, instead of adding two two digit numbers, you can do things like 43 + 279. This adds variety and pushes your skills. If you want to stick to same digit problems, you can. 2. Practice non-traditional operations Athena Math allows you to practice percents, square roots, modulo, greatest common divisors (GCD), and least common multiples (LCM) calculations. These operations are rarely available in mental math…

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