Apps similar to Koalendar include Thunderbird Appointment, which is free and open source. Other options are Cal.com, Lunacal, Doodle and Calendly. Appointment Schedulers like Koalendar are a crowded field, with more than 50 alternatives for the web, iPhone, Android, iPad and self-hosting.
Use your time efficiently by speaking to people when it is convenient for both of you, without scheduling a meeting. TAG allows you to make and receive calls only when you actually have the time to do so.
Sweden
EU
Cale is an API-first appointment scheduling system that integrates easily with your application, providing businesses with a reliable way to manage reservations. It supports multi-tenancy, allowing you to handle multiple clients or environments (such as testing and production)...
Hibox Scheduler is a completely free, cloud-based alternative to Calendly, Acuity Scheduling and other booking apps. No user or feature limitations. We host for you so no need to implement any code.
SpainEU
Designed for busy professionals who need fast, flexible scheduling. Aivee Booking uses AI and Smart Prompt Scheduling to instantly find the ideal time for your 1-on-1 meetings — all from a single, one-off link.
Singapore
Clipse is a scheduling tool that delivers instant meeting times that work for everyone. For product/program/vendor relationship managers dissatisfied with polling groups of people for lists of available meeting times, Clipse then synchronizes your availability with that of your...
United States
Completely free, and available across hundreds of Industries, RapidReg is built to dramatically speed up your registration process. Whether you want people to register for your online course, check-in to your building, agree to a waiver for your activity, or sign up for your...
