Way of Indian Math

A little shift.A brighter mind.

Thirteen ways to see numbers differently.

From Level 1 to Master 7, each rank teaches a different way to see a multiplication. No ads, no network, just ink-quiet focus.

Open in the App Store¥350 · One-time

Level 1 · Multiplying by 11

26 × 11

26 × 11

26 × 11, no long multiplication.

Watch the digits of the problem become the answer.

Path

Understand. Practise. Progress.

Learn at your pace, build confidence, then take the rank exam.

The app’s “Learn” screen

  1. Learn

    Follow the moving numbers, one step at a time.

  2. Practise

    No time limit. Repeat until it clicks.

  3. Challenge

    Aim for 5 seconds per question, 50 for all 20.

Curriculum

Thirteen ways of seeing.

Each method is the shortest path through one specific pattern. You don't memorise it — you learn to see it.

All 13 methods

Level

Level 1ab × 11
When it works
Multiplying by 11
Steps
  1. Find the tens digit a and the ones digit b.
  2. Add a + b.
  3. Put a in the hundreds place and b in the ones place.
  4. Put a + b in the middle (the tens place).
  5. If a + b is 10 or more, carry 1 over to the hundreds place.
Example
26 × 11 = 286
Level 2(ab) × (cb), a+c=10
When it works
Same ones, tens sum to 10
Steps
  1. Multiply the tens digits to get a × c.
  2. Add the ones digit b to that to make the top part.
  3. Multiply the ones digits to get b × b.
  4. Write b × b as two digits, padding with a leading zero if needed.
  5. Place the top part and the last two digits side by side to get the answer.
Example
35 × 75 = 2625
Level 3(ab) × (ac), b+c=10
When it works
Same tens, ones sum to 10
Steps
  1. Multiply the tens digit a by the next number, a + 1.
  2. Use that result as the top part.
  3. Multiply the ones digits to get b × c.
  4. Write b × c as two digits, padding with a leading zero if needed.
  5. Place the top part and the last two digits side by side to get the answer.
Example
43 × 47 = 2021
Level 4(1a) × (1b)
When it works
Both numbers in 11–19
Steps
  1. Add the ones digit of the right number to the left number.
  2. Multiply that result by ten.
  3. Multiply the ones digits to get a × b.
  4. Add a × b to the value you just multiplied by ten.
  5. Use that total as the answer.
Example
13 × 14 = 182
Level 5(N − d)(N + d)
When it works
Average is a round number
Steps
  1. Find N, the average of the two numbers.
  2. Find d, the distance from the average.
  3. Compute N × N.
  4. Compute d × d.
  5. Subtract d × d from N × N.
  6. Use that result as the answer.
Example
37 × 43 = 1591
Level 6Numbers near 100
When it works
Both numbers in the 90s
Steps
  1. Subtract each number from 100 to get the shortfalls x and y.
  2. Subtract y from the left number to get the top two digits.
  3. Multiply x and y to get the bottom two digits.
  4. If the bottom result is only one digit, pad it with a leading zero.
  5. Place the top two digits and the bottom two digits side by side to get the answer.
Example
97 × 96 = 9312

Master

Master 12-digit × 1-digit
When it works
2-digit × 1-digit
Steps
  1. Split the two-digit number into its tens and ones.
  2. Multiply the tens digit by the one-digit number, then multiply by ten.
  3. Multiply the ones digit by the one-digit number.
  4. Add the two results to get the answer.
Example
37 × 6 = 222
Master 2even × ones-is-5
When it works
Even 2-digit × ones-is-5
Steps
  1. Divide the even number by two to halve it.
  2. Double the number that ends in five.
  3. Check that the doubled number now ends in zero.
  4. Multiply the halved number by the doubled number to get the answer.
Example
24 × 35 = 840
Master 3(a5) × (b5)
When it works
Both end in 5
Steps
  1. Multiply the tens digits and multiply by one hundred.
  2. Add the tens digits and multiply by fifty.
  3. Add 25 to the total of those two to get the answer.
Example
35 × 75 = 2625
Master 4even × 25 / 75
When it works
Even 2-digit × 25 / 75
Steps
  1. If the multiplier is 25, multiply the even number by one hundred.
  2. If the multiplier is 75, multiply the even number by three hundred.
  3. Divide the result by four to get the answer.
Example
68 × 25 = 1700
Master 5(a1) × (b1)
When it works
Both end in 1
Steps
  1. Multiply the tens digits to get a × b.
  2. Add the tens digits to get a + b.
  3. Put 1 in the ones place.
  4. Write them in order from left to right: a × b, then a + b, then 1.
  5. If the middle or right part is 10 or more, carry to the left.
Example
31 × 41 = 1271
Master 6(ab) × (ac), same tens
When it works
Same tens digit
Steps
  1. Square the tens digit a to get a².
  2. Add the ones digits to get b + c.
  3. Multiply a by b + c to get the middle value.
  4. Multiply the ones digits to get b × c.
  5. Write them in order from left to right: a², then a × (b + c), then b × c.
  6. Carry to the left if any part overflows.
Example
34 × 37 = 1258
Master 7Vertical & crosswise
When it works
General 2-digit × 2-digit
Steps
  1. Multiply the tens digits to get a × c.
  2. Multiply the ones digits to get b × d.
  3. Multiply crosswise to get a × d and b × c.
  4. Add the two crosswise products to get ad + bc.
  5. Write them in order from left to right: a × c, then ad + bc, then b × d.
  6. Carry to the left whenever any part is 10 or more.
Example
47 × 58 = 2726

Price

¥350. Once.

One-time. No ads. No subscriptions. No accounts.

One-time

¥350

(tax incl.)

One-time⁝ ⁝ ⁝

Zero ads

No ad SDK, no interruption to learning.

Fully offline

The app holds no network permission.

13 languages

Japanese, English, French, German, Korean, Chinese (Simplified & Traditional), Hindi, Spanish, Italian, Russian, Turkish, Thai.

iOS / Android

Available now for iPhone and iPad. The Android version on Google Play is coming soon.

Open in the App StoreAvailable for iPhone and iPad

Frequently asked

What you might be wondering.

  • 01Is it really one-time?

    Yes. ¥350 unlocks all thirteen methods and all thirteen ranks. No subscriptions, no in-app purchases.

  • 02Is it suitable for children?

    Yes, from upper elementary age. The expressions are number-led, designed to work with a parent alongside.

  • 03Does it work offline?

    Yes. The app holds no network permission. All progress and best times stay on the device.

  • 04Are there ads?

    No. No ad SDK is included.

  • 05Do I need an account?

    No. There is no account system, no cloud sync. History does not transfer between devices.

  • 06Which languages are supported?

    13 languages: Japanese, English, French, German, Korean, Simplified and Traditional Chinese, Hindi, Spanish, Italian, Russian, Turkish, and Thai. The app follows your OS language, and you can also pick a language in Settings.

  • 07Why five seconds per question?

    Five seconds is a sane upper bound for the three steps of mental math: read, see the pattern, build the answer aloud. Beyond that, you're doing long multiplication.