Abstract: The invention relates to a method for generating executable code (10, 10?) that is intended to be executed on a mobile end device (12, 12?) having at least one app builder unit (16) with at least one memory unit (18) in which at least one base code (24, 24?) is stored, and which has at least one input module (20) and at least one generating module (22), wherein required functions and/or data (D1, D2, D3, D4) are entered through the input module (20) by a user in a first procedural stage (SI) and the generating module (22) embeds at least part of the required functions and/or data (D1, D2, D3, D4) in the base code (24, 24?) in a later procedural stage (S4).