Numbo: 넘보

Content rating
Everyone
50+
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Content rating
Everyone
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About this app

**Numbo, a fun math practice app that lets you steadily improve your mental arithmetic skills every day. Immediately after installation, you can access all the features, compete with friends, and compete against users worldwide through the league system.

**Various Practice Modes**

Free Practice: Choose your desired operation and difficulty level to practice to your heart's content.
- Addition, subtraction, multiplication, division, or mixed modes.
- Adjustable difficulty for 1-5 digit numbers.
- Choose from 10, 20, 50, or 100 problems.
- Easily adjust the difficulty with animal presets (rabbit, cat, fox, bear, lion).

Time Attack: Solve as many problems as possible within the time limit.
- Choose from 30, 60, 120, or 180 seconds.
- Develop both focus and speed.

Perfect Run: Complete the challenge without making a single mistake! Continue your combo
- Immediately end with a wrong answer
- Challenge the longest combo record
- Stunning visual effects based on your combo

Daily Challenge: Compete for national rankings with the same questions every day
- Once a day, the same 10 questions within the same league tier are provided
- Customized difficulty levels for each league tier
- Check your skills in the national rankings

Incorrect Answer Review: Practice the questions you got wrong again
- Automatically collects incorrect answers
- Repeat practice with similar variations
- Once you've mastered the game, it will disappear from the list.

**With Friends**

Add Friends: Easily add friends using codes, nicknames, or QR codes.
Dual Match: 1-on-1 real-time competitions! Who will be faster and more accurate?
Assign Missions: Give your friends special missions and track their achievements.
Cheering Stickers: Send cheering messages to your friends.
Friend Leaderboard: Who will be number one among your friends this week? Activity Feed: Check out your friends' achievements and cheer them on.

**League System**

5 Tiers: Bronze - Silver - Gold - Platinum - Diamond
Weekly Season: A new season starts every Monday
Guild Showdown: Compete with 50 players in the same tier
Promotion/Demotion: The top 20% are promoted, and the bottom 20% are demoted
Rewards: Earn badges based on your tier and rank

**Growth Tracking**

Stats Dashboard: Analyze your daily/weekly/monthly activity
Action Analysis: See at a glance which operations are strong and weak
Streaks: Track your consecutive study days and stay motivated
Achievement Badges: Earn badges by completing various achievements
Insights: Personalized advice, including your progress compared to the previous week and analysis of your weak operations

**Your Avatar**

Adorable Animal Characters: 36 different animal avatars
Unlockables by Tier: 10 basic avatars + 26 additional avatars unlocked through challenges
Each character has a unique name and bio
Profile Badges: Show off your achievements

**Groups (Guilds)**

Challenge Together: Create a group and achieve goals with friends.
Group Missions: Missions the entire group can complete together.
Group Leaderboard: Check the rankings of members within the group.
Group Streaks: Record the group's activity streak.

**Parental Connection**

Parental Dashboard: Check your child's learning progress.
Assign Missions: Parents can assign learning missions to their children.
Notifications: Receive notifications for your child's streaks, mission completions, league promotions, and more.

**Key Features**

- Completely free (no ads)
- All features available immediately after installing the app (no membership required)
- Offline support (free practice mode)
- Supports Korean and English
- Data synchronization (with password registration)
- Push notifications (streak reminders, friend activity, etc.)

**Recommended for**

- Students who want to improve their mental arithmetic skills
- Adults who want to maintain a healthy brain
- Anyone who wants to study math in a fun way
- Those who want to be motivated by competing with friends
- Those who want to develop a consistent daily study habit For those who want to
- Parents who want to manage their child's learning

**Download Numbo now and become a mental arithmetic master!**
Updated on
Mar 11, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
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Committed to follow the Play Families Policy

What’s new

새로운 별자리 캐릭터가 추가됐어요
Content rating
Everyone
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App support

Phone number
+827082113112
About the developer
알케미스트(주)
service@rchemist.io
대한민국 18126 경기도 오산시 수목원로88번길 35 제16층 제에프1616비호 (가수동)
+82 10-3837-8241