# U888 > Solve fast arithmetic equations, train your brain, and master mental U888 math! Canonical page: [https://chrome-stats.com/d/com.mentalmath.trainerpractice.challenge](https://chrome-stats.com/d/com.mentalmath.trainerpractice.challenge) ## Overview - **ID:** `com.mentalmath.trainerpractice.challenge` - **Platform:** Android - **Type:** Android app - **Status:** Removed - **Publisher:** MASSONETTO EXPRESS LTD - **Category:** GAME\_ARCADE - **Downloads:** 3,576 - **Version:** 1.5 - **Last updated:** 2026-09-02 - **First published:** 2026-08-13 - **Publisher country:** GB - **Size:** 25 MB - **Data as of:** 2026-09-04 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.mentalmath.trainerpractice.challenge) - **Privacy policy:** [https://sites.google.com/view/mental-math-trainer](https://sites.google.com/view/mental-math-trainer) ## Description Welcome to U888 - the ultimate educational arcade game designed to sharpen your cognitive abilities, boost your counting speed, and elevate your mathematical skills! Step into a sleek, modern learning laboratory where equations become an exciting race against the clock. This application is perfect for quick daily mental workouts and long-term analytical progress alike.
Dynamic Numerical Arithmetic and Brain Workouts
The core experience delivers an incredibly stimulating and educational gameplay loop. Before entering a math match, you have total authority over your training path: select your preferred arithmetic operation from addition, subtraction, multiplication, or division, and choose a difficulty level that fits your comfort zone. Once the countdown begins, quick algebraic formulas will pop up on the screen. Analyze the numbers, calculate the solution in your head, and tap the correct option from the multiple-choice grid before time runs out. Complete consecutive correct answers to unlock high-score multipliers and claim your championship trophy!
Flawless and Smooth Application Navigation
Intuitive Interface Design: Get straight to your brain training session without dealing with confusing submenus. The highly responsive, clean dark-blue layout structure ensures that swiping through mathematical categories, checking daily quests, and selecting parameters is completely seamless.
Effortless One-Handed Controls: Enjoy a stress-free gaming session with fully optimized casual mechanics. Customizing your training preferences, selecting your answers, and activating helpful calculation hints can all be managed effortlessly using just a single finger.
Daily Brain Boosters and Learning Prizes
Consistent Attendance Rewards: Regular mental workouts yield great rewards! Make sure to open the application every single day to unlock your complimentary daily bonus chest, accumulate free gold, and keep your virtual inventory fully loaded for the next challenge.
Lucky Math Fortune Wheel: Take a short intermission between tense counting sessions to spin the bonus prize wheel. Test your personal luck to acquire extra gameplay hints, score multipliers, and unique resources to accelerate your educational journey.
Download U888 today, challenge your intellect, and track your progress to become a genuine numbers wizard ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.ACCESS_WIFI_STATE` - `android.permission.INTERNET` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.VIBRATE` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.mentalmath.trainerpractice.challenge.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Quick Math: Mental Calc Master](https://chrome-stats.com/d/com.dylanford.quick_math) — 4 users - [MathTrainer: Brain Practice](https://chrome-stats.com/d/com.sat.mathtrainer) — 46 users - [Mental Math Master: Math Games](https://chrome-stats.com/d/com.thenoob.mental_math_master) — 352 users - [Mental Math Master Brain Game](https://chrome-stats.com/d/com.mentalarithmetic) — 198,064 users, 5.00 / 5 - [Arithmetic Mental Math](https://chrome-stats.com/d/com.comma.mentalkid) — 640 users - [Mental Math Master](https://chrome-stats.com/d/com.cowdragon.mentalmathmaster) — 431 users - [Mental Math: Offline Math Game](https://chrome-stats.com/d/com.newtan.mentalmath) — 1,655 users - [Math Brain Trainer](https://chrome-stats.com/d/com.eritron.math_game_android) — 150 users - [math](https://chrome-stats.com/d/com.adamfulugence.beamcast) — 85 users - [Skillsfit: Mental Math Trainer](https://chrome-stats.com/d/space.skillsfit.mentalmathtrainer) — 29 users - [MathFast: Speed Math & Brain](https://chrome-stats.com/d/com.mathfast.mathfast) — 1 users - [Math Challenge](https://chrome-stats.com/d/com.elm_cr4.mentalmathchallenge) — 57 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.mentalmath.trainerpractice.challenge)