Game system, information communication terminal, and program

A game apparatus that provides a user with gameplay for development of one or more characters that develop through a plurality of development stages, the game apparatus comprising:

• a heart rate sensor that detects a heartbeat of the user;
• an acceleration sensor that detects movement of the user;
• a display capable of displaying a screen of the gameplay;
• and
• processing circuitry configured to execute the gameplay based on the activity information of the user that includes heart rate information obtained by the heart rate sensor and movement information obtained by the acceleration sensor, wherein
• the game apparatus is configured as a single device that the user can wear on the user's body portion,
• the gameplay including:
• updating a first parameter based on the heart rate information and the movement information;
• accumulating a development score based on at least the first parameter, the development score relating to development of a character being developed;
• determining a target character in development of the character being developed based on the accumulated development score;
• and
• creating the screen of the gameplay and displaying the screen on the display, wherein
• the gameplay further includes determining a state of activity of the user into one of states of activity classified by a combination of the heart rate information and the movement information, and
• the screen includes display of appearance of the character being developed, the appearance corresponding at least to the determined state of activity of the user.