Public speaking isn't easy. It's actually, like, kind of a problem that affects, um, roughly 74 per cent of people.Whether it's long pauses, or the use of 'hedging' language (see previous sentence), the way you speak can negatively affect your credibility. So what do you do? Picture your audience naked? Focus all that anxious blinking on one particular, bewildered person? Orai is a mobile public speaking course designed to tackle this specific problem, and in doing so, transforms your smartphone into a speaking coach. Created by engineering students at Drexel University, Orai helps you curate your word choices. By listening to recordings of your speech, Orai uses machine learning to give feedback relating to filler words, pacing and word clarity. It Windows Helpline Number even has a function to try to improve your vocal energy.The idea came from a simple need for expression. When Danish Dhamani and Paritosh Gupta moved to the US, English was not their first language. Paritosh grew up in India, whereas Dhamani was raised in Tanzania. They attended public speaking clubs but knew they weren't for everyone - costly both in terms of time and finances. In an interview with Fast Company, the pair said "there had to be a better way."