Common Challenges
Forced Learning
While school homework is important, it often feels like a passive task forced upon the child.
Homework dominates study time, making it difficult to foster a child-led learning habit at home.
SumliaHabit-forming Math App
Build Habits withLearning Science
Not just a math app, but an engine for building "Intrinsic Motivation".By combining computational drilling with behavioral reinforcements and immediate feedback, we nurture a child's natural desire to learn.
Start Now
Creating an account is free. Charges begin only after checkout.
Grow Math Skills &"Joy of Growth"
A different way to support practice habits and confidence.
Do any of these struggles sound familiar?
Throws a tantrum when making mistakes
Gets extremely frustrated with errors and refuses to try new, challenging problems.
Sick of the current study routine
Tired of repetitive methods and feels heavy-hearted even before sitting at the desk. Has lost motivation to learn.
No time to micromanage
Busy with work and chores, lacking the bandwidth to sit beside them constantly. Yet, leaving them alone means no studying happens.
Hard to see progress and praise
Want to tell them "Good job", but struggling to identify exactly what has improved, making encouragement vague or difficult.
Sumlia Plants the Seeds of Confidence
Accumulating small wins through behavioral learning science.
Monitor True Growth
Compare with yesterday's self, not others. Tangible progress like "I got faster than yesterday" helps children notice their own change.
Fail Safe
Mistakes aren't shameful; they are proof of trying. A safe environment without penalty points unlocks independent learning.
Step by Step
We don't tackle high walls right away. Climbing small stairs labeled "I can do this" eventually takes them to great heights.
10 Mins a Day
10 minutes of pure focus, then done. Short, daily repetition builds much stronger habits than long, dreadful study sessions.
How It Works
The 3-Step Natural Cycle
A system designed to make the next short practice easier to start.
1
Daily Challenge
5–10 minute calculation exercises starting with a difficulty level they definitely "can do".
2
Feel the Growth
Faster than "themselves from before". Practice is shown as visual flowers, helping children notice their own change.
3
Take the Lead
After noticing progress, children can choose a next goal such as "I want to do this next."
Why focus solely on "Calculation"?
The core goal is not to cram more knowledge, but toincrease the tangible feeling of progress.
Calculation secures instant "Wins".
The shorter the distance between effort and result, the more likely a child is to choose the next challenge.
We skip complex geometry and word problems intentionally, focusing purely on building rigorous applied skills within computation.
- 01
Reason
Immediate Results
The distance between effort and result is short, leaving a sense of achievement right on the spot.
- 02
Reason
Visible by the Numbers
Clear comparisons with yesterday allow both the child and parents to share a solid sense of forward progress.
- 03
Reason
Creating Cognitive Margin
Core computational skills create mental bandwidth for applied thinking.As calculation becomes automatic, more cognitive resources are freed up for complex geometry and word problems.
Designing the velocity at which effort becomes reality.
Short effort → immediate feedback → next challenge. Connecting these unbroken links makes learning shatterproof.
The "Ungraded" Progressive System
We adapt entirely to your child's "current abilities", unconstrained by their school grade.
Not a fixed-grade curriculum
- 1
STEP 1
Diagnose Baseline
Always begin with "problems they can solve" to remove any cognitive hurdles.
- 2
STEP 2
Build the Foundation
Iterate between basic and slightly challenging steps in micro-increments, trying various approaches to solidify habits.
- 3
STEP 3
Micro-Adjust Difficulty
Using accuracy and speed data, we guide them to the next challenge without overstretching.
- 4
STEP 4
Advance Beyond Grade
Progressing purely based on mastery—from integers to decimals and fractions—building arithmetic skills steadily.
Note
This is not a test-prep app aligned with standard school textbooks. It is an adaptive design aimed at solidifying computational foundations based on your child's true mastery level.
PRICING
Pricing & Legacy Guarantee
Paid plans are available to residents of Japan. The prices below are the current prices in Japanese yen, including tax.
These are special prices for the early-use period. Customers who start a paid plan during this period will generally keep their contract price while they stay on the same plan. We will announce the end of the special-price period in advance, and regular prices will apply to new subscriptions started afterward.
Our Promise to You
- ✓Locked-in legacy pricing. Even if prices rise in the future, your contract remains the same.
- ✓Monthly subscribers can switch to the annual plan through billing settings.
- ✓Continuous improvements maintaining the core, uninterrupted learning experience.
Monthly Plan
¥1,200/ mo (tax incl.)
Billed monthly, cancel anytime
- ✓ For about the price of one workbook.
- ✓ Upgrade to annual whenever ready.
Legacy Guarantee included
Annual Plan
¥8,000/ yr (tax incl.)
- ✓ Save ¥6,400 compared to 12 monthly payments.
- ✓ About ¥667 a month to secure their habit.
Legacy Guarantee included
Create an account to review the available plans and billing terms before you subscribe.
Creating an account does not start a paid subscription.Charges begin only after you choose a plan and complete checkout.
Building a Foundation for Self-Esteem
This app exists for far more than just boosting math scores.Through the simple process of gaining computational speed and turning "I can't" into "I can", we want children to visceralize the feeling that"I can do it if I try."We built this with the unwavering desire to install the ultimate life pillar: the power to independently think and push forward without fear of failure.