Best Micro-Investing App for Beginners in 2026
The best micro-investing app for beginners depends on one question: do you want the app to invest for you, or do you want to pick your own stocks? Everything else — fees, minimums, banking features — flows from that choice.
Six apps dominate this space in 2026: Acorns, Stash, Public, Robinhood, M1 Finance, and SoFi Invest. Each takes a different approach, and the wrong pick can cost you more in fees than you earn in returns — especially at small balances. This guide compares all six on what matters most to a beginner. Nothing here is investment advice. If you are starting with very little, our guide on how to start investing with $100 covers the practical first steps.
Quick Comparison Table
Pricing and features reflect the most commonly reported tiers as of June 2026. Always verify on each app’s website before signing up.
| Feature | Acorns | Stash | Public | Robinhood | M1 Finance | SoFi Invest |
|---|---|---|---|---|---|---|
| Monthly fee | $3–$12 | $3–$9 | $0 | $0 (Gold: ~$5) | $0 (Plus: $95/yr) | $0 |
| Minimum to start | $0 | $1 | $1 | $0 | $100 | $1 |
| Investment style | Automated (robo) | Self-directed | Self-directed | Self-directed | Hybrid (Pies) | Self-directed |
| Fractional shares | Via ETF portfolios | Yes | Yes | Yes | Yes | Yes |
| Round-ups | Yes (core feature) | Yes (Smart Stash) | No | No | No | No |
| Individual stocks | No | Yes | Yes | Yes | Yes | Yes |
| IRA | Yes (Silver+) | Yes (Stash+) | No | Yes | Yes | Yes |
| Banking | Yes (Checking) | Yes (debit card) | No | Yes (Cash Card) | Yes (Plus) | Yes |
| Best for | Hands-off automation | Learning by doing | Social community | Simplest trading | Automated + control | All-in-one banking |
Acorns: Best for Fully Automated Spare-Change Investing
Acorns rounds every purchase to the nearest dollar and invests the spare change into a diversified ETF portfolio matched to your risk tolerance. You never pick a stock. You never time the market. The app handles everything.
This hands-off approach makes Acorns the easiest entry point for beginners. The downside is cost. At $3/month for the Bronze plan, a $100 portfolio effectively pays 36% per year in fees. Acorns only becomes cost-efficient once your balance grows into the low thousands.
For a full breakdown of every tier, see our Acorns fees 2026 guide.
Choose Acorns if: you want a completely passive experience where spare change turns into investments without any decisions on your part.
Stash: Best for Beginners Who Want to Learn by Picking
Stash takes the opposite approach from Acorns. It lets you browse individual stocks and ETFs organized by themes — “Clean & Green,” “American Innovators,” and so on — and buy fractional shares starting from $1. You make the decisions, but the app’s categorization and guidance reduce the intimidation factor.
Stash also offers a Stock-Back debit card that converts a percentage of everyday purchases into fractional shares of the companies you shop at. Plans start at $3/month, and the higher Stash+ tier ($9/month) adds an IRA and custodial accounts.
The downside is the same as Acorns: flat monthly fees eat into small balances. And because you are picking your own investments, you need to be comfortable making those choices — even if Stash holds your hand more than a traditional brokerage.
If you are torn between these two, our Stash vs Acorns comparison covers every detail side by side.
Choose Stash if: you want to learn investing by doing it, with guardrails and themed categories to keep it manageable.
Public: Best for Community-Driven Investing
Public positions itself as a social investing platform. You can follow other investors, see what they are buying, and join community discussions around specific stocks and market events. Trades are commission-free, fractional shares start at $1, and there are no monthly subscription fees.
What sets Public apart is transparency — it does not use payment for order flow (PFOF), meaning it does not sell your trade data to market makers. The platform also offers treasury bills and a high-yield cash account. The trade-off: no IRA, no round-ups, and no automated portfolio building.
Choose Public if: you learn best from seeing what others invest in and want a commission-free, no-subscription platform with a community feel.
Robinhood: Best for the Simplest First Trade
Robinhood removes friction. The app is clean, onboarding takes minutes, and buying your first fractional share takes a few taps. Commission-free trading, no account minimum, and an IRA with a contribution match on some plans. The Gold tier (~$5/month) adds margin and Morningstar research.
The weakness is depth. Research tools are basic, and the simplicity that makes it easy to start can also make it easy to overtrade. For a detailed comparison against its closest rival, see Robinhood vs Webull.
Choose Robinhood if: you want the absolute easiest way to make your first trade and prefer a calm, minimal interface.
M1 Finance: Best for Automated Portfolios With Control
M1 Finance splits the difference between a robo-advisor and a self-directed brokerage. You build a “Pie” — a customized portfolio of stocks and ETFs in whatever proportions you choose — and M1 automatically invests your deposits according to that allocation. It handles rebalancing, fractional shares, and recurring investments.
The free tier requires a $100 minimum, which is higher than other apps on this list. M1 Plus ($95/year) adds a checking account, lower borrowing rates, and afternoon trading windows. There are no per-trade commissions.
M1 is a strong choice if you know roughly what you want to own but do not want to manually execute every trade. The catch is that it offers no round-ups, no social features, and the interface is more complex than Acorns or Robinhood.
For a head-to-head with the most popular automated alternative, read our M1 Finance vs Acorns comparison.
Choose M1 if: you want to design your own portfolio once and have the platform automate everything after that.
SoFi Invest: Best All-in-One Banking and Investing
SoFi Invest is part of the broader SoFi ecosystem — banking, loans, credit cards, insurance — all in one app. The investing side offers commission-free stock and ETF trading, fractional shares from $1, automated portfolios, and an IRA. No monthly fees.
The advantage is consolidation. If you already use SoFi for banking or student loans, adding investing keeps everything in one place. Members also get complimentary financial planning sessions. The trade-off is depth — research and automated portfolio customization lag behind M1 and Robinhood.
Choose SoFi if: you want banking, investing, and financial planning under one roof with no subscription fees.
How to Pick: Match Your Style
Choosing comes down to three questions:
1. Do you want the app to invest for you? Go with Acorns (fully automated, spare-change driven) or M1 Finance (automated, but you design the portfolio). Both handle the ongoing work. The difference is whether you want to set your allocation or let the app decide.
2. Do you want to pick your own stocks? Go with Stash (guided, themed categories), Public (community-driven, transparent), or Robinhood (simplest interface). All three are self-directed, but the experience around the trading is different.
3. Do you want everything in one app? Go with SoFi Invest if you value having banking, investing, and loan management together. Convenience over specialization.
If you are a college student, our best micro-investing app for college students guide narrows this list further for tight student budgets. And if you are still building the savings habit before investing, how to automate savings with round-up apps covers the mechanics of turning spare change into real money.
FAQ
How much money do I need to start micro-investing?
Most apps on this list let you start with $0 to $1. M1 Finance is the exception at $100. The real question is whether monthly subscription fees (Acorns at $3, Stash at $3) make sense at very small balances. If your portfolio is under $500, a $3/month fee represents a significant annual cost.
Are micro-investing apps safe?
All six apps listed here are registered with FINRA and are members of SIPC, which protects brokerage accounts up to $500,000 in securities if the firm fails. SIPC does not protect against investment losses — your portfolio can still go down. Check each app’s regulatory disclosures before signing up.
Can I lose money with micro-investing apps?
Yes. Investing always carries risk. Micro-investing makes the dollar amounts small, which limits your downside while you learn, but the investments themselves — stocks, ETFs, bonds — fluctuate in value. You can lose part or all of what you invest.
Should I use a micro-investing app or a traditional brokerage?
Micro-investing apps are built for small, regular contributions. If you have larger amounts or want advanced research and options trading, a traditional brokerage like Fidelity or Schwab may fit better. Many beginners start with a micro-investing app and move to a full brokerage later. For a broader look, see our best investing app for beginners guide.
Verdict
There is no single best micro-investing app — only the best one for your situation.
- Want total automation with zero decisions? Acorns. Just watch your balance grow from spare change.
- Want to learn by picking stocks with guidance? Stash. Themed categories and Stock-Back rewards make it approachable.
- Want a community and transparency? Public. No fees, no PFOF, and a social feed of real investors.
- Want the easiest possible first trade? Robinhood. Minimal interface, fast onboarding.
- Want to design a portfolio and automate it? M1 Finance. Build your Pie, fund it, forget it.
- Want banking and investing in one place? SoFi. No subscription, full ecosystem.
Start with the one that matches how you actually want to interact with your money. You can always switch later — and at micro-investing amounts, the cost of trying the wrong app for a month is a few dollars, not a financial disaster.