Apps and product demos must be coded during the 2.5 day duration of the hackathon. This means no pre-written code may be used, other than open-source and stacks e.g., LAMP, MEAN, METEOR, etc. Participants can leave the event venue at any time and code elsewhere. All participants are required to use Github to prove that code written was indeed written during the event. Code authenticity (event generated) will only apply to the finalists. Pre-installed software (e.g., IDE's) is fine. There are no restrictions on coding languages used. Third party APIs and SDKs can be used.