This is as "quick" as side projects go: https://crushentropy.com/ (Markdown for hi-res planning). I made it one weekend a couple years ago and I've used it myself ever since.
App served by Flask running on App Engine. Data persisted to Firebase. Costs me approximately $0 per month. 100% uptime afaik.
App served by Flask running on App Engine. Data persisted to Firebase. Costs me approximately $0 per month. 100% uptime afaik.