World App review: World Coin, How to use it, Risks and Advantages | Is it Safe? ✅ What is World App? The World App is a digital wallet and identity system, co-founded by Sam Altman (CEO of OpenAI, the company behind ChatGPT). Think of it like Binance + ID system in one app. It allows you to store and transfer crypto like Bitcoin, Ethereum, Solana, and of course, Worldcoin (WLD). But what makes it unique is the iris scan verification…