In short: the best stock trading app in 2026 is the one that matches what you trade, how often you trade and how much support you need. Rankings change; criteria don't. Use the checklist below to compare apps.
The criteria that matter
| Criterion | What to check |
|---|---|
| Costs | Commissions, spreads, fees on options, transfers and inactivity |
| Protection | Broker registration and SIPC coverage in the US |
| Execution | Order types, fill quality, uptime on busy days |
| Assets | Stocks, ETFs, options, bonds, crypto, event contracts |
| Tools | Charts, research, alerts, paper trading |
| Support | Help channels and how disputes are handled |
You can look up any US broker on FINRA's BrokerCheck before you open an account.
Types of apps
- Full-service brokers (such as Fidelity or Charles Schwab): broad research, long track records, strong for long-term investors.
- Mobile-first apps (such as Robinhood or Webull): simple interfaces, popular with newer investors.
- Professional platforms (such as Interactive Brokers): advanced tools and global markets, with a steeper learning curve.
Each type can be the "best" for a different person. If you are new, ease of use and clear costs matter more than advanced tools.
Where prediction markets fit
Some brokerage apps now offer event contracts next to stocks. Robinhood lists prediction markets through regulated partners, and Interactive Brokers runs ForecastEx. These contracts pay 1 dollar if an event happens and 0 if not, so they behave very differently from shares. Read our reviews of Robinhood's prediction markets and ForecastEx, or compare dedicated platforms in our best prediction market apps review.
Practise before you trade
Free simulators such as MarketWatch's Virtual Stock Exchange let you place trades with virtual money. Our guide to paper trading shows how to keep honest records.
Our verdict
Pick an app that is properly registered, transparent about costs and suited to your experience. Avoid choosing on sign-up bonuses alone, and set limits before your first trade. Investing involves risk, including the loss of your money.
Next step
In the United States, the regulated route is the Polymarket US app. Read our guides on signing up and depositing to get started, start small and only use money you can afford to lose.