Are investing apps safe?
Last updated August 2026
Short answer
The app is an interface. What matters sits behind it: which regulated entity holds your money, and what happens to it if that entity fails.
Check one: registration
Brokers are listed in FINRA BrokerCheck with registration status, the states they operate in, and any disciplinary history. Advisers appear in the SEC database at adviserinfo.sec.gov.
Both are free and take a minute. An app that cannot be found in either, while accepting deposits, has failed the only test that matters at this stage.
A disclosure event is not automatically disqualifying. Large firms accumulate them. Reading what they were for is more informative than counting them.
Check two: SIPC membership
Membership means that if the brokerage fails and customer assets are missing, protection of up to $500,000 per customer applies, including a $250,000 limit for cash.
This is coverage against the firm failing, not against your holdings falling. SIPC states directly that it does not protect against the decline in value of your securities.
Some apps advertise additional private insurance above those limits. That is a commercial contract with an insurer, so the conditions matter and are worth reading.
Check three: who holds the assets
Many apps do not self-clear. A separate clearing firm holds the securities, and it is that firm's membership and financial health that decide what happens in a failure.
The relationship is disclosed in the account agreement, usually in the first few paragraphs. If the app cannot name its custodian plainly, treat that as the answer.
Assets held in your name at a regulated custodian survive the app going out of business. Money sent to a company's own account does not have that property.
Try it in Walnut
Walnut connects to a brokerage account you already have and takes no custody of your money or securities.
What the checks do not cover
Order execution quality, which is real money and rarely visible. An app earning from routing orders has an interest you should know about, disclosed in its reports.
Product risk. Options, margin and leveraged funds are dangerous in proportion to how easy the interface makes them, and none of that is a custody question.
Your own behaviour, which is where most losses actually come from. Notifications, streaks and confetti exist to increase activity, and activity is not the same as return.
Practical hygiene
Turn on two-factor authentication, and prefer an authenticator app over SMS where offered.
Read what happens to uninvested cash. Swept into a bank program it may be FDIC insured; held at the broker it falls under the SIPC cash sub-limit.
Keep statements. They are the record that lets you reconstruct cost basis years later, whatever happens to the app.
Where your uninvested cash sits
Cash in a brokerage account is not automatically the same product as cash in a bank. Some apps sweep it into partner banks, where FDIC insurance applies per bank up to its own limits.
Cash left at the broker instead falls under the SIPC cash sub-limit of $250,000, inside the $500,000 total.
The difference is disclosed in the account agreement and rarely on the marketing page. For a large cash balance it is worth knowing which of the two you actually have.
Sources
Registration records are published at FINRA BrokerCheck and adviserinfo.sec.gov. Coverage limits and exclusions are from SIPC. Walnut is informational and is not an investment adviser. This guide is educational and not personalized investment advice.
FAQ
How do I check whether an investing app is legitimate?
+
Look up the broker in FINRA BrokerCheck and any adviser in the SEC database at adviserinfo.sec.gov. Both are free, both show registration status and disciplinary history, and an app that appears in neither while holding customer money is the case to walk away from.
What does SIPC membership actually get me?
+
Up to $500,000 per customer, including a $250,000 limit for cash, if the brokerage fails and assets are missing. It restores what should have been in the account. It does not compensate you for investments that lost value.
Is a free app more dangerous than a paid one?
+
Not inherently, but free means the revenue comes from somewhere else: order flow, margin lending, interest on idle cash, or premium tiers. None of those are secret, and knowing which one applies tells you what the app is designed to encourage you to do.
What is the biggest real risk?
+
Behaviour, not custody. The most common way to lose money in an investing app is trading too often in response to prompts designed to make trading feel engaging. That risk is not covered by any regulator or insurance scheme.
Is my uninvested cash FDIC or SIPC covered?
+
It depends on whether the app sweeps cash to partner banks or holds it at the broker. Swept cash falls under FDIC limits per bank; cash at the broker falls under SIPC's $250,000 cash sub-limit. The account agreement says which applies.