As a reminder for taking breaks at regular intervals. I use this chrome extension https://chrome.google.com/webstore/detail/strict-workflow/cgmnfnmlficgeijcalkgnnkigkefkbhd . Set it up based on your requirement. You can also go for a physical Pomodoro timer. Source: about 2 years ago

For forcing myself to work, I use either the Forest app or LifeAt. With Forest, I commit kahit mga 30 minutes to sit down and work kahit ayaw ko by planting a little virtual tree. The tree or plant fully grows in your garden after the set tims, pero pag di mo natapos, medyo may pang-guilt trip na "You killed your tree" and wilted siya sa garden :(. Source: over 1 year ago

I don't know of any specific app that does what you want but you can mix it up across platforms. I track all my writing time with Toggl Track's free plan and I use Google Sheets for word count. If you're looking for distraction blockers I'd recommend Forest for your web browser if you want something free, but if you're willing to pay for something more powerful I recommend Freedom or the even more restrictive... Source: almost 2 years ago