TINA is described as 'Design Suite is a powerful circuit simulation package for analyzing, designing, and real time testing of analog, digital, VHDL, MCU, SMPS, RF, communication, optoelectronic and mixed electronic circuits and their PCB layouts' and is a circuit simulator in the education & reference category. There are more than 50 alternatives to TINA for a variety of platforms, including Windows, Linux, Mac, Web-based and Flathub apps. The best TINA alternative is KiCad, which is both free and Open Source. Other great apps like TINA are Fritzing, Square Sketch, Circuit JS and QUCS.