Here’s a little chart for you to compare Koalendar and Doodle for yourself:
Doodle is a free appointment polling software that can help you decide the best time for your meetings. Once you set it up, you can share it with your intended participants to select which time works best for them. The Premium version syncs events with your calendar, send automated reminders, customize your meeting page, and more. When working with international clients, be sure to remind them to adjust the calendar’s time zone manually, along with quick instructions on how.
Koalendar is a great Doodle alternative because it offers a clean, modern, and intuitive interface, for free.
Your invitees will get a delightful booking experience along with a customizable questionnaire to qualify them. You'll also enjoy a live and quick customer service, directly from the developer.
But don't take our word for it: feel free to try Koalendar free account.