DoOne
I like that DoOne isn't trying to sell you another generic Pomodoro timer. The integrations with GitHub and GitLab are the whole point, and that's a smart bet. Developers are skeptical of tools that ask them to change how they work, so tying the timer to the repos and issues they already have open removes a lot of friction. You don't have to log what you're working on; the tool can see it.
What I'd want to know is how deep those integrations go. Does it pull in your open PRs and let you pick one to focus on? Does it post a status to your team when you're in a deep work block? The description says "and more," which could mean a lot. For a solo founder shipping a side project, a timer that quietly tracks time against specific issues could be genuinely useful for billing or just for seeing where the week went.
The competitive space here is crowded, from Toggl to Forest to the built-in focus modes in every OS. But the dev-native angle is what could set DoOne apart. If the integrations feel native and the UX stays out of the way, this has a real shot at finding a loyal niche. I'd be curious to see pricing and whether they're targeting individual devs or small teams.