集金さん

A web-based collection checklist created by organizers for drinking parties, class reunions, club fees, and after-parties.

• Simply enter the member list and amounts, paste the URL to LINE. When participants press "I've paid," it automatically gets checked off, and cash payments are recorded on-site by tapping the person's name
• Supports tiered pricing by position or grade (amounts are only visible to the individual), mixed payment methods (PayPay, bank transfer, cash), personalized reminder messages, and reception duty-sharing with co-organizers
• No registration or app required, completely free. Money is not held by the service; participants pay the organizer directly

The distinctive feature is development driven by real data. By analyzing 161 actual collection sheets created (totaling 1,954 people and approximately 10.8 million yen), features are decided based on patterns like "frequent revisions → batch editing function" and "reception bottlenecks → co-organizer support." Some of the aggregated data is made public:

• Collection data: https://shukinsan.com/data
• Drinking party tiered calculation tool: https://shukinsan.com/keisha