You can read about it here: https://jerseyfonseca.com/projects/bujo
2. They’re easy to build. Getting from 90%~100% isn’t much harder than getting from 80%~90%, unless almost all real-world apps.
3. Everybody has an opinion about a tweak to the general formula that would make a better to-do app (for them personally).
4. They’ve seen others do it.
2) Every programmer can build it.