A chat app with a Google Sheet database. Totally free to use and deploy, with about a 30-second delay.
A lighter-weight take on the same idea: instead of Firebase, this chat app uses a Google Sheet as its database, making it entirely free to host and deploy with no paid backend required. The trade-off is a roughly 30-second delay between messages, since it polls the sheet rather than using a real-time connection — a deliberate simplicity-for-cost trade explored as a contrast to the Firebase version.
Shakib Hossain Tahmid