Short answer: Replace WhatsApp groups gradually: move tasks first, then team chat, keep the old group read-only for a few weeks, and make the new app easier than the old habit.
Step by step
Choose the request type that causes most chasing.
Send those only as tasks for two weeks.
Move team chat once tasks are working.
Make the old group read-only.
Archive it after a month.
What makes it stick
Managers stop answering work requests in WhatsApp.
The new app is as easy as WhatsApp.
People see that requests get done faster.
Frequently asked questions
What if some people refuse to switch?
Make the work app the only place where requests count. Most people switch once they see the benefit.
Try it with your team
Start with one WhatsApp group and one type of request. Please Do It is free for 30 days, with no credit card required.