I can do this on my phone while in the house with an APP but is it possible to do this while away from my house?

My problem is that if I go away for 7 days there will be no EPG for the 7th day, if I go away for two weeks then there's no EPG for those last 8 days.
I have tried everything to try and download two weeks of EPG but as far as I can see it doesn't exist.

For your info I only need about 13 Freesat channels on 28.2E so it's quite a basic need.

Thanks