Batch certificate printing for a Thai school — admin edits names/topic/date in a Google Sheet, a read-only Apps Script web app renders one certificate per name and sends them to the print dialog.

Public booking page for a solo photographer — customers pick a date, see hourly slots, and book with name + phone; bookings land straight in a Google Sheet with no admin UI to build.

Mobile-first attendance app for teachers — pick a class and date, tap present/late/leave/absent per student, save straight to a Google Sheet.

Zero-cost rental room marketplace for a condo owner — each room gets a printable QR code linking to its own gallery/price/availability page, with Google Sheets as the admin panel and Drive as photo storage.

Restaurant queue system on Google Apps Script + Google Sheets — 100% free, no server to run.

Turns FlipDeck (a PDF-to-3D-flipbook React app) into a Google Apps Script Web App template — point it at a catalog PDF in Drive and deploy, no git or Node needed by the end user.