A lo-fi prototype is one that is low fidelity, low tech, and simple. The opposite of this would be a hi-fi prototype. Lo-Fi prototypes can help you succeed during the innovation and design process.
What is the purpose of prototyping?
A prototype is not a proof-of-concept. Prototypes are used during the design and innovation stage to test and refine ideas, while a proof-of-concept is used to sell the idea to investors or key stakeholders.