Numbers & Letters is a mental arithmetic and vocabulary game, in the spirit of the well-known French TV game show of the same principle, with no affiliation to it. Two game modes: * Numbers: 6 numbers are drawn along with a target to reach. Build your calculation step by step, calculator-style, combining the numbers with the 4 basic operations. * Letters: 10 letters are drawn. Find the longest possible word using these letters before time runs out. Several ways to play: * Solo game, with 4 levels of increasing difficulty (Emile, Nestor, Monique, Mathieu), alternating numbers and letters rounds. * Duo game, for two players on the same phone, with a Duo mode (each keeps their own score) or a Head-to-head mode (only one winner per round). * Network game, the same duo game but on two separate phones, connected over Wi-Fi or Bluetooth. * Daily challenge, with a randomly drawn goal each day and trophies for streaks of successful days. * Streak, timed, words and no-mistake challenges, to progress at your own pace. * Free training mode, with no time limit and no round limit. The app keeps track of your statistics and rewards your progress with trophies, offers a light or dark theme, and works entirely offline: no ads, no trackers, no network connection required (except to play a network game). Free and open source software under the GNU GPL-3.0 license.