It’s just ok.

Focus can be counted on to count down 25 minutes and look nice doing it (if you like minimal design). But there’s a lot of work to be done here. The interface, while simple, is often baffling and very un-mac-like. Information is hidden and difficult to find. If the app window is hidden or burried, there’s no hope seeing even the amount of time left on your timer (menu item or animated dock icon seem like the obvious answer here). All and all the app feels like nibware thrown together as someones sophomore “I just learned Cocoa programming” project, not a featured app costing $10.

The developer does say "It isnt perfect yet, but that may change over time. You can support the development and write me some feedback or leave a review on the App Store.” Maybe the $10 is a vote of confidence in the developer? Or a way of funding future development and improvements? But as much as I would like to see this app improved, I can’t recommend the $10 price of entry until some significant polish has been added.

jemmons about Focus – Productivity Timer