I think you've misunderstood the Pomodoro technique if you think it's 25mins per hour. It's simply 25mins blocks of time, 5mins non-work, rinse-and-repeat.
When I timebox, I use Vitamin-R which let's me extend the time slice to finish a task. Probably the hardest part is breaking tasks down into 25min chunks
I just used that as an example from the article. Honestly I think the idea of timeboxing may be useful if a person can't keep on track, but I don't have an issue with getting stuff done on time. One of the arguments from the article was that timeboxing can prevent "perfectionism", which I think should be prioritized and not restricted by a time constraint. Finish the important MVP features first, then, if you have time left, make it sexy and perfect.
The thought of using a program to timebox, then asking that program to extend your time just seems bizarre to me.
No judgments on your end here, I just do what works for me, and you do what works for you. I think that people should try to feel it out first, and if that fails, move to a structured technique.
edit: just read my typo. mean 25mins/block perviously.
When I timebox, I use Vitamin-R which let's me extend the time slice to finish a task. Probably the hardest part is breaking tasks down into 25min chunks