From one family’s schedule to a nation in motion.

A family rarely has just one schedule.

There is the school calendar, the soccer team calendar, dance classes, scouts, appointments, work commitments and the plans families make together. Each schedule belongs to a different group, but they all shape the same family life.

For entrepreneurs and life partners Liat and Gilad Hertanu, this was not an abstract productivity problem. It was their everyday reality - and it inspired them to build two different approaches to making time easier to manage.

24me Smart Personal Assistant

First came 24me.

In the early 2010s, Liat and Gilad were raising three children under the age of four while building their careers.

“We felt overwhelmed with all the day-to-day life activities.” Liat

They wanted one place where each person could organize their personal calendars, tasks, notes and reminders. When they could not find an app that brought everything together, they created 24me.

Since launching in 2013, 24me has helped people manage their individual schedules and responsibilities through one connected personal assistant. It gave Liat and Gilad a clearer way to organize their own days as parents, entrepreneurs and partners.

But as their family grew, they discovered another challenge - one that was not about managing an individual calendar. It was about connecting all the groups that shaped their family’s time.

One family. Many calendars.

A few years later, the Hertanu family had grown to seven.

Each family member continued to have their own personal calendars connected. But their schedules were also being shaped by many external groups: schools, tennis teams, dance classes, scouts, workplaces and the family itself.

The school managed one schedule. Their son’s tennis team managed another. Their daughter’s scouts organized trips, camps and activities. The family had its own plans, while Liat and Gilad also had work, sport and personal commitments.

They did not need to replace their personal calendars. They needed a platform that could adapt to their dynamic lives - allowing every group to manage its own shared calendar while automatically bringing all the relevant events into each person’s complete schedule.

That insight became GroupCal.

Every group manages its own.
You see everything together.

GroupCal brings the simplicity of group messaging to scheduling.

People can create or join multiple shared calendars, each with its own members, purpose and updates. A school can manage its calendar, a sports team can publish practices and games, and a family can coordinate appointments and plans.

When any of those groups adds or changes an event, the relevant members receive the update automatically. Their calendars are populated by the different shared calendars they belong to, creating one clear, aggregated view of their schedule.

There is no need to copy dates from messages, repeatedly ask whether plans have changed or manually rebuild everything inside a separate master calendar.

GroupCal does not ask every part of life to fit inside one shared calendar. It allows each group to manage its own - and then brings everything together for the individual.

“This isn’t just about managing time. It’s about creating an environment where our family can grow together, celebrate each other’s journeys, and ensure that no one is left out of the loop.” Liat