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I'm a fan of postcards - they're lovely to receive and keep on your fridge for an indefinite period of time. However, they are a bit of a pain to send; working out where the post office is and how much it's going to cost can be tricky, especially if you're in a country where you're unfamiliar with the language. sqgl lets you use your phone to send real, physical, personalised postcards to friends and family (or yourself, if you're that way inclined) without needing to find a post office, write addresses, or track down a stamp.