Methods and apparatuses for designing custom footwear are disclosed. An apparatus for designing custom footwear may include a data collection system, a data processing system, and a manufacturing system, where the manufacturing system includes an additive manufacturing device. A method for designing custom footwear may comprise receiving user-specific data, generating a user model, identifying issues in the user model, determining corrective features, generating a custom footwear model, and manufacturing the custom footwear.