01
Settlement gets shorter
It helps organize who should pay whom so the group does not have to untangle everything manually.
Split / Recall
Make expense sharing part of the memory.
wattcha is built for travel, dinners, and events where multiple people pay over time and still want the moment itself to remain worth looking back on later.
Expense sharingPhotosGroup flow
The current destination site is still primarily Japanese. This page explains the product first, then sends people there.
Features
What it changes
A group-focused web service that combines expense sharing with photos and group history.
02
The context stays with the numbers
Photos and history make the record feel like part of the event, not just the cleanup after it.
03
Built for real group situations
Trips, dinners, and temporary group activities are the product's natural context.
Use cases
Where it fits best
Trips with repeated split payments
Events or dinners that need a quick cleanup afterward
Groups that want the memory as well as the math