Habits tracker is completely free, without ads and you can track as many habits as you want. In-App purchases are just a tip jar option, there are no features tied to this.
The app that helps you track any goal you want to achieve
* Easy way to add a new record and manage your habits
* 5 different ways to see your achievements
* Use the widgets to see your progress in a glance
* Enable notifications to keep track of all your goals
All data is stored in your device or in your iCloud