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Best Stock Trading Apps for 2021

Blain Reinkensmeyer

The best online brokers 2021 review (11th annual) took three months to complete and produced over 40,000 words of research. Here's how we tested.

Like most things in today's high-tech world, trading stocks has become an everyday activity on mobile devices. The best stock trading apps offer $0 stock and ETF trades, are easy to use, and deliver a fully-featured online trading experience for everyone from beginner to seasoned active traders.

For our 2021 Annual Review, we thoroughly tested 11 stock trading apps and reviewed each on 40 different features. To score high marks, a broker had to provide an excellent stock trading experience across many usability categories. Testing was conducted using an iPhone XS (Apple iOS) and Samsung Galaxy S9+ (Android).

Best Stock Trading Apps 2021 2021 Review
Fidelity logo

Best Stock App for Investors - Open Account
Trade Commission-Free: No commissions to trade online U.S. stocks, ETFs, and options.1

Fidelity’s mobile experience is cleanly designed, bug-free, and delivers a phenomenal experience for investors. While active traders may be left wanting more, for the majority, Fidelity delivers, winning our award, No. 1 Investor App, for 2021. Read full review


Best App for Options - Open Account
Limited Time Offer: Open and fund an E*TRADE account & get $600 or more w/ code: BONUS21

In our 2021 Review, E*TRADE once again ranked among the best because its apps are easy to use and feature-rich. My recommendation: use E*TRADE mobile for stock trading and Power E*TRADE Mobile for options trading. Read full review

TD Ameritrade logo

Best Stock App for Traders - Open Account
Exclusive Offer: Get up to $375 and trade commission-free with TD Ameritrade.

TD Ameritrade delivers $0 trades, fantastic trading platforms (including our favorite trading app, thinkorswim), excellent market research, industry-leading education for beginners, and reliable customer service. While not No. 1 for mobile trading, TD Ameritrade took first place Overall in our 2021 Review. Read full review

Interactive Brokers logo

Best Stock App for Professionals - Open Account
Exclusive Offer: New clients that open an account today receive a special margin rate.

Mobile trading with Interactive Brokers is well supported across all devices. From lightning-quick streaming data to full-featured order entry and portfolio management, Interactive Brokers includes everything professionals require to trade on the go. Read full review

Merrill Edge logo

Great for Stock Research

Merrill Edge's mobile app is easy to use, great for research (including ESG research), and exceeds the industry standard experience. For existing Bank of America customers, the mult-account rewards and universal account functionality makes Merrill Edge an easy winner. Read full review

Other Trading Apps

In addition to our top five stock apps for 2021, we reviewed six others: TradeStation, Charles Schwab, Webull, Robinhood, Firstrade, and Ally Invest. Here are our high-level takeaways for each. To dive deeper, read our reviews.

TradeStation logo

6. TradeStation - Open Account
Promo Offer: Commission-Free Trades on Stocks, ETFs & Options Trades Advertisement

TradeStation's mobile app is meticulously designed and provides the functionality that active and professional traders need to succeed. Thanks to Matrix (ladder trading) and complex options trading support, full day trading functionality is incorporated. Read full review

Charles Schwab logo

7. Charles Schwab

Charles Schwab provides a consistent and generally enjoyable experience for mobile trading, regardless of the device. That said, for active traders, Schwab's mobile apps lack core functionality in two key areas: alerts and quotes. Read full review

Webull logo

8. Webull - Open Account
Current Offer: $0 commission trading for online stocks, ETFs, options, cryptos and more on Webull!

While Webull's mobile app offers more features than Robinhood, it struggles to compete with the extensive amount of trading tools provided by the best stock trading apps. Read full review

Robinhood logo

9. Robinhood
Robinhood's stock app is very easy to use; however, now that all online brokers offer $0 stock and ETF trades, Robinhood's lack of trading tools and research leaves it a step behind the competition. Read full review

Firstrade logo

10. Firstrade - Open Account
Commission-Free Trading on 700+ ETFs

While Firstrade is easy to use and terrific for Chinese-speaking investors, its overall offering struggles to stand out against brokers who also offer $0 stock trades. Read full review

Ally Invest logo

11. Ally Invest
If you are not already an Ally Bank customer, Ally Invest struggles to compete as a standalone broker. Ally Invest trails industry leaders in most areas, including trading platforms, tools, investment research, and education. Read full review

Best stock trading apps comparison

Comparing stock apps side by side, while features such as real-time streaming quotes, charting with multiple indicators, and synced watch lists are commonly found, others are not. For example, less than 50% of stock apps support basic stock alerts.

Feature E*TRADE
Open Account
TD Ameritrade
Open Account
Open Account
Interactive Brokers
Open Account
Watch List Syncing Yes Yes Yes Yes
Stock Alerts Yes Yes Yes Yes
Charting - After Hours Yes Yes Yes Yes
Charting - Drawing No Yes No No
Charting - Study Customizations Yes Yes Yes Yes
Heatmapping No No Yes No
Stream Live TV Yes Yes Yes Yes
Barcode Lookup Yes Yes No No
Mobile Trading 5 5 5 4.5

Comparison Tool: Compare 100+ features side-by-side

What is the best stock trading app for beginners?

For beginners in 2021, the best stock trading apps are TD Ameritrade and Fidelity. Between the two brokers, TD Ameritrade has the edge for educational resources and trading tools. Meanwhile, Fidelity offers a more comprehensive research experience for casual investors.

What is the best free trading app?

The best free stock trading app is TD Ameritrade. Unlike most brokers, TD Ameritrade offers two apps: TD Ameritrade Mobile and thinkorswim Mobile. TD Ameritrade Mobile is designed for casual investors. Meanwhile, thinkorswim Mobile is designed for the feature-hungry active trader. Both apps are top notch.

How do I choose the best stock trading app?

Now that all stock apps offer $0 stock trades, we recommend comparing other app features to choose the best stock trading app. The most widely used stock app features are watch lists, stock charts, and order tickets, so make sure those are great. To help readers, we include full screenshots of each stock trading app in our broker reviews.

Fun fact: Not all stock trading apps offer real-time streaming quotes. Instead, some apps only refresh stock quotes every few seconds or longer. Watch lists aside, apps like TD Ameritrade and TradeStation provide excellent stock chart tools and stock alerts functionality. Both brokers offer traders access to several hundred technical indicators in addition to endless customization options.

Which stock app offers the best technology?

On the innovation front, TD Ameritrade was one of the first brokers to offer an Alexa Skill, and in August 2017, it became the first broker to integrate with Facebook Messenger, embracing the future of artificial intelligence (AI) with its own chatbot. In 2018, Apple Business Chat was added. Then, in 2019, TD Ameritrade for Apple CarPlay and Android Auto both rolled out. All in all, TD Ameritrade is the undisputed leader in mobile trading tech and can be found everywhere you are.

TD Ameritrade isn't the only broker to offer Alexa Skills. Fidelity, Charles Schwab, and Interactive Brokers offer Alexa Skills compatibility, too. Note: Our research this year did not include testing specific Alexa features; however, based on Amazon’s ratings, it appears TD Ameritrade has the lead in delivering a diverse quality experience.

Can I start trading with $100?

Yes. Nowadays, most online brokers offer no minimum deposit to open an account, commission-free stock and ETF trades, as well as the availability of fractional shares. As a result, new traders can start trading with a small investment such as $100. To compare features and pricing, use our online broker comparison tool.


To recap, here are the best online brokers for beginners.

Best stock trading apps 2021

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For the 11th annual best trading platforms review published in January 2021, a total of 2,816 data points were collected over three months and used to score brokers. This makes home to the largest independent database on the web covering the online broker industry.

Participation is required to be included. Each broker completed an in-depth data profile and offered executive time (live in person or over the web) for an annual update meeting. Our rigorous data validation process yields an error rate of less than .001% each year, providing site visitors quality data they can trust. Learn more about how we test.

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Blain Reinkensmeyer

About the author: As Head of Research at, Blain Reinkensmeyer has 20 years of trading experience with over 1,000 trades placed during that time. Referenced as a leading expert on the US online brokerage industry, Blain has been quoted in the Wall Street Journal, The New York Times, the Chicago Tribune, and Fast Company, among others.

All pricing data was obtained from a published web site as of 01/19/2021 and is believed to be accurate, but is not guaranteed. For stock trade rates, advertised pricing is for a standard order size of 500 shares of stock priced at $30 per share. For options orders, an options regulatory fee per contract may apply.

TD Ameritrade, Inc. and are separate, unaffiliated companies and are not responsible for each other’s services and products. View terms.

1Sell orders are subject to an activity assessment fee from $0.01 to $0.03 per $1,000 of principal.

Options trading entails significant risk and is not appropriate for all investors. Certain complex options strategies carry additional risk. Before trading options, please read Characteristics and Risks of Standardized Options. Supporting documentation for any claims, if applicable, will be furnished upon request.

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