Equaljoints app provides an extension of the EQUALJOINTS tools for calculation and verification of seismic response of steel joints according to EC3-1-8 and the pre-normative design guidelines for three types of bolted joints prequalified with EQUALJOINTS project (i.e. (i) unstiffened extended end-plate, (ii) stiffened extended end-plate and (iii) haunched beam-to-column joints) as well as welded dog-bone joints. It also allows the access to the experimental database developed in the EQUALJOINTS project.