Need a desktop notification sender.
Software has 2 side. Desktop application and online admin side.
Both side screenshot are attached to project files. Please check.
A notification will add from admin , and will be a javascript or html file. Time and date can be set in admin side.
After it the notification will show in clients pc.
For total project i will charge 100$ or given per hour rate..whichever you prefer.
Please do let me know if you find this costly.
No need to pay if not satisfied completely.
Regards,
Darpan