The best alternatives to hourglass are Purp, Flow Dashboard, and GoodTask. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of hourglass?
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Purp is a to-do and goal tracker app to help the users achieve their goals, accomplish projects, and manage daily tasks on a smart way. The app has the Brain function. It shows which task you have to do in given time of the day in order to reach each of your goals effectively and in time.
GoodTask is a Powerful Task/Project Manager based on iOS Reminders & Calendars. You can use it as simple checklist to focus or as complex project management tool to get big things done. GoodTask provides various viewpoints to the things that you care and need to be done.
Don't just track habits, set goals, work towards them. Visualize your progress. Make immediate adjustments and reach your objectives. Become your better quantified self.