Postage Pro UK (updated December 2021)

Postage calculator for Royal Mail and Parcelforce, latest update is December 2020. Postage Pro has been regularly updated since 2012.

Latest update includes the postage rates for 1st January 2021. Previous updates included the Christmas posting dates, and the changes to international postage rates from July and September 2020.

Includes a size guide, tips when it's cheaper to split your package into multiple smaller items and a lot more (see screenshots for details).
Postage Pro has postage rate you'd pay at the Post Office counter, and Royal Mail franked rates.
Weight is accepted in grams / kg / ounces and pounds.
Very useful for eBay, amazon and etsy traders.
Other useful features:
a detailed description of each service is available
automatic switching to Parcelforce for heavier items
automatic calculation of the most efficient way to use 1st/2nd class stamps (eg. for a parcel costing £10.00, use 4x1st class and 10x2nd class)
a size guide in both cm and inches
a handy shopping basket (to calculate totals, unfortunately you can't pay for postage with this app)
no adverts / banners
xmas posting dates

Check the screenshots to see this app in action.

Please email postprouk@gmail.com if you have any questions or suggestions.