OpenSea, the largest NFT marketplace, is launching an app for users in the Google Play ($GOOGL@US) and Apple ($AAPL@US) App Store this week. The app launch follows news that a company employee participated in an NFT insider trading scheme. The company, valued at $1.5 billion, admitted to the incident, and CEO Devin Finzer tweeted an apology to users on Wednesday. Despite the controversy, OpenSea has had a big month. In August, the website saw 2 million transactions, totaling $3.4 billion in trading volume. The company has financial backing from big names in the crypto industry, including Coinbase Ventures, Blockchain Capital, and Mark Cuban.