Stuart recommended an app to help when choosing wine. I tested it over the weekend and am a fan.
The app is Vivano. It allows you to scan a wine bottle label and if it has details of the wine in its database then it'll tell you more than the label will.
You'll find out what should expect to pay for a bottle, whether it's deemed to be a good wine for that vineyard, region, country our indeed globally. You can add your own notes so that you remember where you bought the wine and you can see reviews by other people.
On Friday I scanned loads of bottles and came away with one white and one red bottle that were rated well at all levels. We've had the opportunity to try both bottles and, whilst I'm no expert, they were both excellent. So I recommend trying the app.