One- and two-band models of stationary electronic processes in nanoscaled heterostructures were developed, using envelope function formalism. Selfconsistency of quantum charge were achieved by Hartree method; Г-X mixing at the hetero-interfaces was included using conception of intervalley coupling constant. Optical phonon scattering were taken into account via introduction of complex part into Hamiltonian, as well as by means of partition of a whole current into coherent and sequential tunneling channels. User-friendly interface realized in Matlab allows to create any consequence of heterolayers for analysis of most of the AIIIBV compounds