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Roughly 70 million years ago, buying and selling stocks was a time-consuming affair that required a land-line phone and a lengthy call with your broker. But in today's digital age, investing has become more accessible than ever before, thanks to innovative app startup ideas.

With the rise of mobile devices, the investment landscape has transformed significantly. Today, you can buy and sell stocks, mutual funds, exchange-traded funds, crypto, and more from the comfort of your own home, or on-the-go using a smartphone. These apps not only enable you to build a portfolio but also provide valuable tools for staying up-to-date with market news, researching new opportunities, and learning how to invest.

However, with so many investment apps available, it can be overwhelming to choose the right one. That's why we've put together this comprehensive list of top-notch app startup ideas, featuring a diverse range of brokers that cater to investors of all experience levels and ages.

Best Investment Apps and Platforms

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Here are our top picks for the best investment apps and platforms:

| App | Apple App Store Rating + Best For | Fees | Promotions |

|---|---|---|---|

| E*Trade | 4.6/5 (Ideal for Intermediate Investors + Traders) | No-commission stock and ETF trades | Account bonus commensurate with contributed funds |

| Betterment | 4.7/5 (Best for Passive Investors Seeking Tax-Loss Harvesting Capabilities) | $4/mo., but changes to 0.25% annual AUM fee if you set up recurring monthly deposits totaling $250, or reach a balance of at least $20,000 across all Betterment accounts. Premium: 0.65% annual AUM fee | None |

| Robinhood | 4.2/5 (Best for Beginners) | No-commission stock and ETF trades | Bonus stock with signup and linked bank account ($5-$200 value) |

| Wealthfront | 4.8/5 (Best for Investors Seeking a Robo-Advisor with Low Minimum Balances) | 0.25% annual AUM fees | $50 deposit bonus |

E*Trade: The Ideal App for Intermediate Investors + Traders

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ETrade is a leading stock investment app that provides investors with access to educational resources, helping you conduct research and analysis, as well as diversify your portfolio. With zero-commission stock, ETF, and options trading, ETrade offers an ideal platform for intermediate investors and traders.

The ETrade platform features two main platforms: Power ETrade and the basic E*Trade platform. The former is designed for more advanced traders, offering advanced charting tools, snapshot analysis, and powerful stock and trade scanners. The latter provides a more user-friendly interface, with real-time quotes, charts, market commentary, and stock news.

Whether you're an experienced trader or just starting out, E*Trade's comprehensive platform has everything you need to make informed investment decisions.