Bar Flip Phablet Slider Smartwatch. Replika is a hard app to categorize. Norwegian app Hold even tries to incentivise its student users by offering points for reducing their smartphone habit , which they can exchange for snacks and cinema tickets. Urban travellers swear by Citymapper, which works for London, Manchester and Birmingham in the UK, as well as other cities around the world. It also lists all transactions and has a good stab at putting them into categories, such as shopping, transport or bills.