# NumDrill - Math You Can't Stop

> Arithmetic to trig — quick daily drills to rebuild your mental math.

Canonical page: [https://chrome-stats.com/d/com.nlpaas.mathfit](https://chrome-stats.com/d/com.nlpaas.mathfit)

## Overview

- **ID:** `com.nlpaas.mathfit`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Ken Itakura
- **Category:** GAME\_EDUCATIONAL
- **Downloads:** 1,658
- **Version:** Prod20260702
- **Last updated:** 2026-07-03
- **First published:** 2026-06-08
- **Publisher country:** JP
- **Size:** 95 MB
- **Data as of:** 2026-09-11
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.nlpaas.mathfit)
- **Website:** [https://ken-itakura.github.io/](https://ken-itakura.github.io/)
- **Privacy policy:** [https://ken-itakura.github.io/appdocs/NumDrill/privacy](https://ken-itakura.github.io/appdocs/NumDrill/privacy)

## Description

Can you still calculate a tip, split a bill, or work out a percentage in your head?<br><br>Every time you reach for a calculator or ask AI, your mental math skills quietly fade. The good news: they come back fast with regular practice.<br><br>NumDrill is a focused mental math drill app designed for short, satisfying sessions. Instead of mindless scrolling or another mobile game, sharpen the brain you already have.<br><br>■ Who it&#39;s for<br>· Anyone whose mental math has gotten rusty from over-relying on calculators or AI<br>· Students preparing for exams or standardized tests<br>· Professionals who want to stay mentally sharp<br>· Anyone who suspects they&#39;re wasting time on games but keeps playing anyway<br><br>■ 10 Problem Categories<br>- Arithmetic (addition, subtraction, multiplication, division — customize digits &amp; decimals)<br>- Quadratic expressions (factoring &amp; expansion)<br>- Trigonometry (sin / cos / tan values)<br>- Square roots<br>- Logarithms &amp; Exponents<br>- Ratio &amp; Percentage (everyday percentage calculations)<br>- Make10 / Make24 (card-based number puzzles)<br>- Memory (memorize and recall grids of numbers &amp; icons)<br>- Mastermind (deduce a hidden number sequence with logic)<br>- Calculator mode (Practice mental arithmetic using calculation patterns you frequently use in everyday life)<br><br>■ 3 Play Modes<br>- Count / Timed / Endless<br><br>■ Features that keep you coming back<br>- Streaks / Combos / XP / Global Leaderboards / Social Share<br><br>■ Customizable<br>- Difficulty / Advance rules / Sound &amp; Vibration<br><br>Your brain is a muscle. Five minutes a day is all it takes.<br>Open NumDrill.

## Rankings

- #1,003,312 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.RECEIVE_BOOT_COMPLETED`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`
- `com.google.android.providers.gsf.permission.READ_GSERVICES`
- `com.nlpaas.mathfit.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.nlpaas.mathfit)