Tensu Navi Coming soon on Google Play →
Chinese Official · Hong Kong · Taiwanese · Japanese riichi

Pick the tiles.
Get every fan and who pays.

Tensu Navi scores a winning hand from the tiles you pick: every fan, tai or yaku, the total, and what each player pays. Five rule sets in one app, all calculated on your phone.

Chinese Official, Hong Kong, TaiwaneseJapanese riichi, 3- and 4-playerYour hand stays on your phone
Tensu Navi input screen for Chinese Official: a hand with the winning tile marked, round wind, seat wind and self-drawn buttons, and the tile palette below
→Tap Calculate
Result screen: 24 pts, with Pure Straight 16, Fully Concealed Hand 4, All Chows 2, Pure Double Chow 1 and One Voided Suit 1, and each of the other three players paying 32
One hand, start to finish

One self-drawn hand.
24 points, and who pays.

Follow a single Chinese Official hand from the tile palette to the payments.

STEP 1
Enter
From the tile palette
Chinese Official input screen with a hand entered, the winning tile marked, and the flowers row
1

A self-drawn hand, East round, East seat

Tap the tiles from the palette and mark the winning tile. The round wind, seat wind and self-drawn or discard are set with the buttons above. Flowers are tapped in at the bottom.

Where it gets hardWhich fan stack, and which cannot be counted together, is easy to get wrong at the table.
Chinese Official input screen with a hand entered, the winning tile marked, and the flowers row
STEP 2
Calculate
Tap Calculate
Result screen with the five fan and their points, total 24, and the payments below
2

24 points, five fan itemized

Pure Straight 16, Fully Concealed Hand 4, All Chows 2, Pure Double Chow 1, One Voided Suit 1: 24 points, above the 8 needed to win. Every fan is listed with its value.

Rules shownThe result says how it was scored: 24 points without flowers, 8 needed to win.
Result screen with the five fan and their points, total 24, and the payments below
STEP 3
See who pays
Self-drawn: all three pay
3

Each of the other three pays 32. You receive 96.

The result lists the other players by seat (left, across, right) and what each pays. Here every one pays 32, the 24 points plus the base of 8, so you receive 96.

Check it at the tableA note under the payments explains how they were worked out, so you can compare with your table.
STEP 4
Switch
From the start screen
Tensu Navi start screen: Chinese Official, Hong Kong, Taiwanese, 4-player and 3-player riichi to choose from
4

Hong Kong, Taiwanese and Japanese riichi, same steps

Choose another rule set on the start screen and the same palette counts fan, tai or yaku instead. Japanese riichi comes in 4-player and 3-player.

Tensu Navi start screen: Chinese Official, Hong Kong, Taiwanese, 4-player and 3-player riichi to choose from

* Every screen shown is the actual Tensu Navi app, with a sample Chinese Official hand.

Use cases

Handy when

You tsumo'd in 3-player mahjong and want to see right away who pays what
You are not sure how to count fu and want to learn from the breakdown
Your table's rules differ on tsumo-loss (the 3-player rule where a self-draw pays less) and honba points, and you want to calculate with matching rules
You want to check a score where there is no connection
You want to check how fan or tai are counted and paid in Hong Kong or Taiwanese mahjong
You want to see which fan can be combined in Chinese Official mahjong (81 fan)
Why rules matter

There is no single
scoring table.

Tensu Navi lets you match your table.

Hong Kong has association tournament rules and house rules that disagree on points such as the cap and the half-spicy table. Taiwanese tables differ on the base, the tai and dealer streaks. Japanese 3-player has its own variants. So each rule set comes with presets and individual settings, and the result screen says which rules it used.

Three promises

Three promises

Your hand stays on your phone

Calculated on the device. No sign-in, and we have no server. Usage measurement never includes tile arrangements or the names of fan.

Five rule sets, one app

Chinese Official (81 fan), Hong Kong (13 tiles), Taiwanese (16 tiles) and Japanese riichi in 4-player and 3-player. Each has presets and settings for your table.

No limit, no sign-up

Free, with no limit on calculations and no registration. Ads are shown (at the bottom of the screen and when you close a result). There are no in-app purchases.

What it can't do Scoring differs between tables and venues, and rules that are not in the settings cannot be matched. Compare the rules shown on the result with your table. A hand that cannot win under the rules (no yaku, or under 8 points in Chinese Official) cannot be scored. The Hong Kong house rules and both Taiwanese presets are unofficial.

How to use

Just three steps

  1. Enter the handTap tiles from the palette. Switch to Chi, Pon or Kan for called sets. New here? Tap Example to try a sample hand first.
  2. Choose the winning tilePick the winning tile last. Set the round wind, seat wind, tsumo or ron and the rest with the buttons above.
  3. Tap CalculateThe points, the yaku or fan and each payment appear. The Yaku and Fu tabs show the breakdown. Rules are in the gear menu.
Q & A

Questions

Which 3-player (sanma) rules does it support?

You can choose the tsumo-loss type, the no-tsumo-loss type (for example child 1 : dealer 2), whether to count fu, how North is treated, honba points and more. Common combinations can be switched at once from presets.

Does it support mahjong other than Japanese?

Yes: Hong Kong mahjong (13 tiles, with or without flowers), Taiwanese mahjong (16 tiles, with dealer streak tai) and Chinese Official mahjong (81 fan, 8 points to win). Finer rule differences can be chosen in the settings.

Which languages does it support?

Japanese, English, Korean and Chinese (Simplified and Traditional). It follows your phone's language setting.

Are my results sent anywhere?

No. Calculation happens on your phone and works without a connection. We have no server.

How do I enter a hand?

Pick the hand from the tile palette, switch to Chi, Pon or Kan for called sets, and finally choose the winning tile. Set the round wind, seat wind, riichi and tsumo or ron, then tap Calculate.

Does a hand always score the same?

Points can change with the rules. The result screen shows the rules used at the top. Please check them against the rules at your table.

Does it cost anything?

It is free, with no limit on use and no registration. Ads are shown (at the bottom of the screen and when you close a result). There are no in-app purchases.

Check the next hand
right at the table.

Every fan and every payment, for the rules you play. All on your phone.

Android (iOS coming soon) · Ages 13+ · Contains ads

Google Play (coming soon)