While using Ganttic your resources don't work from 9 to 5. You can set each resource different working hours. Plan by the effort you don't want to plan using task duration but the effort it should take to complete the task. You can start date and planning tool will do the rest for you. Adjust the utilization Instantly after you have created a task a utilization graph will appear.
The key features of Ganttic are:
Ganttic price starts from $25
Ganttic can be deployed on following platforms: Windows, Linux, Android, iOS
Ganttic supports following languages: English
Ganttic provides the following API's: Open API, API for custom integration
Ganttic can be integrated with: Google Authentication Appliance, Microsoft Outlook, Google Calendar
Ganttic provides the following training/resources: Documentation, Webinars
Ganttic customer support options are: Email, Phone, Live Chat, Tickets