hr is described as 'Simple, clean and easy-to-use time tracking app in your Mac's menu bar.- Keep your projects and clients organized with categories.- Manage, prioritize and archive your tasks. Press Play to start timing' and is an app in the Office & Productivity category. There are four alternatives to hr for Mac, iPad, iPhone and Android. The best alternative is Daily. It's not free, so if you're looking for a free alternative, you could try timeEdition. Other great apps like hr are Tyme (Paid) and Chrono Plus (Paid).
Daily shows what you have been working on and for how long. It tracks your activities by periodically asking what you are doing instead of using timers. Use resulting timesheets to submit your hours, create invoices or simply increase your productivity.
timeEdition is targeted at all users in a computer workplace who value detailed documentation of their working hours, whether they use it for customer billing or for monitoring the duration of individual projects.