TD-NMR Relaxometer mSpin is the simplified version of TD-NMR analyzer Spin Track. mSpin is equipped with electronic console and portable magnet system without advanced options like sample temperature control and pulse gradient system. It is designed especially for R&D and studying needs of Universities and Colleges and provides relaxation times measurements as well as multicomponent decays measurements and pulse sequences construction. Basic pulse sequencies like FID (Free Induction Decay), Hahn Echo, Hahn Echo Decay, CPMG, Solid Echo, MSE (Magic Sandwich Echo), Double Quantum Relaxation, "saturation-recovery" and "inversion-recovery" with illustrated examples and fitting options are included into the standard software package. mSpin is the ideal instrument to academical classrooms for effective studying of NMR basics and for lecture demonstrations. Observable nuclei: 1H (basic configuration); ²H, ¹⁹F, ²³Na, ³¹P, ²⁷Al and ²⁹Si (optional configurations).