3 Best Investing Apps for UK beginner investors: 1. @trading212 : great app with low fees that enables you to practice investing virtually... before you can actually start investing your money. 2. Nutmeg: good for helping less experienced investors choose a diversified portfolio and It makes it easy to check up on your performance. 3. moneyboxteam: allows you to invest your spare change. For example when you buy a drink for £2.50, moneybox will round it up to £3 and invest the 50p for you.