Í am doing app for cars To remmember when it need an oil change for example. An alert for future. A date that user set. Í need help with this. I don unos how to do. Thanks a lot

Welcome Caroll. There are many ways you can use App Inventor to schedule an event at a future date . An extension, in your case is probably not required. This example shows one way using a Clock . It is not a full app. Modify it to do what you want it to do [scheduleEvent] to schedule an even…