By Bo Starr, Co-CEO of Grifin. Last verified August 17, 2026.

Open Acorns if you know, honestly, that you won't log in and the deposits need to happen without you. Open Robinhood if you'll pick two or three broad ETFs, hold them, and would rather pay no monthly fee at all.

Quick disclosure: we make Grifin, a competing investing app that links the cards you already use through Plaid and automatically buys fractional shares of the public brands you spend at, inside a real brokerage account. It gets exactly one sentence in the argument below. The reason we wrote this anyway is that the comparison pages ranking today miss a change that matters: since February 2026, Robinhood only pays interest on your idle cash if you subscribe to Gold.

What's the fundamental difference between Robinhood and Acorns?

They're built on opposite assumptions about you. Robinhood assumes you'll show up: it's a free, self-directed brokerage where you search for a stock or ETF and buy it, fractionally, from $1, with no commissions. Acorns assumes you won't: it rounds up your card purchases to the nearest dollar, sweeps the change into a pre-built ETF portfolio, and runs recurring deposits on a schedule, for a subscription starting at $3 a month. Neither assumption is wrong. The mistake first-timers make is picking the app for the person they wish they were. If you've had a savings plan fail because you had to do something manually, believe that data about yourself.

What do they cost, and what's the catch on each?

Acorns is $3, $6, or $12 a month depending on tier (Bronze, Silver, Gold). The catch is fee drag on small balances: $3 a month is $36 a year, which is 7.2% of a $500 balance. It takes a few thousand dollars invested before that fee looks like a normal expense ratio. Robinhood's base tier is genuinely free, and the catch is subtler. As of February 2026, interest on uninvested cash requires Robinhood Gold at $5 a month or $50 a year, so cash sitting idle in a free account earns nothing. Robinhood also offers ETFs and stocks but no mutual funds, and its interface is engineered to make trading feel exciting, which is exactly what a nervous first-timer doesn't need at 11pm.

Which one is better for retirement money?

Probably Robinhood, which surprises people. Its IRA comes with a 1% match on contributions, and 3% with Gold, which is free extra money no other major brokerage matched when it launched. Acorns Later offers IRAs too, with a contribution match at its higher tiers, but you're paying the monthly subscription for access. If your first investing goal is retirement and you're choosing strictly between these two, the fee math and the match both point to Robinhood, with one caveat: an IRA at Fidelity or Schwab, with no subscription and the full universe of index funds, beats both for a buy-and-hold saver. A comparison that won't tell you that is selling you something.

When is Acorns clearly the right choice?

When automation is the product you're actually buying. The person who should open Acorns has tried to invest before and stalled, doesn't want to choose anything, and responds well to progress they can see accumulating. Round-ups are small, but they're psychologically clever: the money leaves in amounts you don't feel, and after a year you have a real balance you never had to decide to build. Acorns also layers on Later, its IRA, and family accounts at the higher tiers, so the bundle can grow if the habit sticks. If that's you, the $3 a month is buying a behavior, not a portfolio, and it's the best $36 a year you'll spend. Grifin sits in a third category here: it's a real brokerage account that automatically buys a small slice of every listed brand you spend money at, which suits someone who wants to own things without picking tickers or handing over a whole portfolio.

When is Robinhood clearly the right choice?

When you have a plan you'll actually execute, even a tiny one. "Buy $50 of a total-market ETF on the first of every month and never sell" is a complete, excellent plan, and Robinhood will run it for free with a recurring investment. You keep the $36 to $144 a year the subscription apps charge, you get the IRA match, and fractional shares mean the dollar amount can be small. The honest warning: the same app that executes your boring plan for free will also show you options, crypto, and 24-hour trading. If you know yourself to be temptable, the free app can get expensive in a different way.

What's the bottom line for a first-timer?

Decide what your real obstacle is. If it's knowledge, it isn't, because "broad ETF, every month, don't sell" is the whole answer, and Robinhood runs it for $0. If it's follow-through, pay Acorns the $3 to take you out of the loop. And if you truly can't decide, remember that the deposit habit matters more than the platform: pick either one today and automate it before the tab closes, because six months of $50 deposits at the "wrong" app beats six more months of comparing. The verdict, one more time: Robinhood for the planner, Acorns for the person who needs the plan removed.

Facts about other apps checked against their own pricing pages on August 17, 2026.