A calculator watch is a digital watch with a built-in calculator, usually including buttons on the watch face. Calculator watches were first introduced in the 1970s and continue to be produced, despite falling from their peak popularity during the 1980s. The most dominant brands were the Casio Databank series and Timex. Today, calculator watches are considered vintage fashion or nostalgia items for their iconic, retro-style appearances. With technological advances in the 2010s, smartwatches greatly improved upon calculator watches by introducing mobile device and Internet capability.