I wrote the first line of code 24th of November, 2018. It was a proof of concept only. I knew that it would all work fine "technically" speaking, and would have no problems building it. However, I wanted to quickly get a feel for how it would work. Also, I wanted it done quickly so I myself could start using it - which turned out to be a great motivator for me.
All in all, a fully functional proof of concept that I could try on friends and colleagues, built in about 1-2 days.
Most importantly the MVP included the product's core functionality from the get go, which made the concept easy to test on people.