while it does not matter for a normal mobile game where exactly the player is (play them anywhere at any time), the player's coordinate and movement are the main elements in a location-based mobile game. A well known example is the treasure hunt game Geocaching, which can be played on any mobile device with integrated or external GPS receiver. External GPS receivers are usually connected via Bluetooth. More and more mobile phones with integrated GPS are expected to come. Several other location-based mobile games, such as BotFighters, are in the stage of research prototypes rather than being commercial successes. Location-based mobile games sometimes have augmented reality functionality, such as in the case of Pokemon Go. Usually in these cases the augmented reality functionality is not at the center of the experience. Augmented reality games Mobile devices have been used as a platform for Augmented reality (AR in short) games, using the device's camera(s) to as an input for the game. While playing the game, the player aims the device's camera at a location and through the device's screen, sees the area captured by the camera plus computer-generated graphics atop it, augmenting the display and then allowing the player to interact that way. The graphics are generally drawn as to make the generated image appear to be part of the captured background, and will be rendered app memorizing as the player moves the device around. The most successful and notable example for a mobile game that has an augmented reality feature is Pokémon Go (2016), where the player travels to locations marked on their GPS map and then can enable the augmented reality mode to find Pokémon creatures to capture. However, as of January 2022 there has been a lack of significant AR mobile games success since, with several AR mobile game projects being shut down, such as Microsoft's Minecraft Earth and Niantic's Catan: World Explorers Multipurpose games Since mobile devices have become present in the majority of households (at least in the developed countries), there are more and more games created with educational, lifestyle and, health improvement purposes. For example, mobile games can be used in speech-language pathology, children's rehabilitation in hospitals (Finnish startup Rehaboo!), acquiring new useful or healthy habits (Habitica), memorizing things and learning languages (Memrise). There are also apps with similar purposes which are not games per se, in this case, they are called gamified apps. Sometimes