Observed arrival · 2026-10-07
Riichi Lens scores the hand at your table
A riichi mahjong companion for entering or scanning a winning hand and calculating its score and payment breakdown.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Four-player riichi players checking a winning hand
- Worth noticing
- It says photos stay on the device, but loading the detector requires internet; three-player rules are not supported.
Field notes
The input flow separates claimed groups from concealed sets, which the tool says it works out automatically. Players can enter visible indicators and counters, with red fives counted automatically and an additional indicator for each quad. The page limits its scope to a single winning hand and identifies several judgments it cannot make from a photo, including furiten and the sequence of play.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue