Royal Mail will now provide notifications to customers telling them when to expect deliveries the day before they come.
The notification will be able to provide a delivery window of two hours, down from the previously offered four-hour windows.
Royal Mail said competitor networks were only able to predict delivery times on the day of the delivery itself.
The company said in a statement: “Notifying customers of their expected delivery time the day before we deliver is just one of the ways we are helping to make our customers’ lives easier.
“Coupled with a shorter estimated delivery time of as little as two hours creates a step change in convenience for online shoppers. Our posting customers also benefit from increased repeat orders from happy online shoppers.
“This latest innovation is part of our major investment in changes that increase convenience for our customers and their recipients.”
The postal service recently announced it would trial using electronic tricycles for deliveries in order to cut pollution. The vehicles are powered by a combination of pedal, solar, battery and brake technology. The company also currently has a fleet of 100 electric vans, which it plans to expand in the future.
In December Royal Mail partnered with the University of Warwick to offer a new training programme for staff.