Best Micro-Investing Apps in the U.S. for Beginners

Investing can feel intimidating when you are starting with only a small amount of money. You may not have hundreds of dollars available every month, and you may not want to choose individual stocks, research funds, or manage a complicated portfolio. Micro-investing apps for beginners are designed to make the first step easier by allowing you to invest small amounts, buy fractional shares, automate contributions, or invest spare change from everyday purchases.

This guide compares 12 micro-investing apps and platforms available to investors in the United States, covering some of the best investing apps for small amounts you’ll find right now. The list includes round-up apps, automated investing platforms, brokerage apps with fractional shares, and services that combine investing with other financial tools. The best choice depends on your goals, account type, fees, investment options, risk tolerance, and willingness to manage the account yourself.

A quick clarification is important: no app makes investing risk-free. The value of investments can fall, and small contributions can still lose money. These services may make investing more accessible, but they cannot guarantee profits or replace an emergency fund, debt repayment plan, retirement strategy, or professional financial advice when you need it.

U.S. audience note: This article is written for readers in the United States and uses U.S. dollars. Availability, eligibility, account features, pricing, tax treatment, investment choices, and disclosures can change. Check the current terms and regulatory information directly with each provider before opening an account.

Personal-use note: I have not personally used every platform discussed in this guide. The apps were selected for their relevance to U.S. beginners, stated features, accessibility, and the different ways they support small-dollar investing. This is an informational comparison, not 12 personal investment reviews.

What Is Micro-Investing?

Micro-investing means investing small amounts of money, often through recurring deposits, round-ups, fractional shares, or automated portfolios. Depending on the service, you might invest $5, $10, or a few cents at a time instead of waiting until you have enough money to buy a whole share of an expensive company or fund.

There are several common approaches:

• Round-ups: The app rounds eligible purchases to the next dollar and invests the difference after the accumulated amount reaches the provider’s threshold.
• Recurring contributions: You schedule regular deposits from a bank account, such as $5 per week or $25 per month.
• Fractional shares: You buy a portion of a share instead of paying for a complete share.
• Robo-investing: The service creates and manages a portfolio based on your goals and risk preferences.
• Automated transfers: The app follows rules you set, or analyzes your cash flow where permitted, to move money into an investment account.

Micro-investing is mainly an access and habit-building strategy. Its long-term result depends on how much you contribute, how consistently you invest, what you own, the fees you pay, your time horizon, and market performance.

12 Best Micro-Investing Apps Available in the U.S.

The platforms below are not ranked according to guaranteed investment performance. They are organized to show the different types of small-dollar investing available to eligible U.S. users. Always verify current features and fees on the provider’s official website.

Quick Comparison

Note: TreasuryDirect is not technically a micro-investing app. It is the U.S. Treasury’s online platform for buying eligible government securities, but it is included as a small-dollar investing alternative. Greenlight Investing is a family-focused financial service rather than a standard brokerage for every adult investor.

1. Acorns

Acorns is one of the best-known round-up investing apps in the United States. Its core concept is to connect eligible spending activity with an investment account and invest accumulated spare change. Users can also make recurring contributions and select from portfolios based on different risk levels.

Acorns may appeal to beginners who want an automated experience rather than choosing individual stocks. The platform also offers financial features beyond investing, although the available products depend on the plan and current terms.

• Best for: Beginners who want round-ups and a managed portfolio in one place.
• Starting amount: Review the current minimums for the specific account and plan.
• Watch out for: Subscription charges, portfolio limitations, account eligibility, and whether the monthly cost is reasonable for your balance.

Small balances can be affected by fixed monthly charges. Compare the annual subscription cost with the amount you expect to invest before signing up.

2. Stash

Stash combines investing education, brokerage features, automated investing tools, and personal-finance features. It may let eligible users invest in fractional shares and exchange-traded funds with relatively small amounts, while also providing educational explanations for people who are still learning the basics.

Stash can suit beginners who want more control than a fully managed robo-portfolio but still want guidance and a simple interface. The extra flexibility also means you are responsible for making sensible investment choices.

• Best for: New investors who want education plus the ability to choose investments.
• Starting amount: Check current account minimums and plan requirements.
• Watch out for: Subscription fees, investment risk, limited research compared with a full-service brokerage, and accidentally concentrating your portfolio in a few companies.

Fractional shares make expensive stocks more accessible, but they do not make an individual stock diversified. Consider broad funds and your overall asset allocation rather than focusing only on share price.

3. Robinhood

Robinhood is a U.S. brokerage app that offers trading and investing features, including fractional-share availability for eligible investments and recurring investment tools. It is generally designed for users who want to manage their own account rather than hand portfolio decisions to a robo-advisor.

The app can make it easy to start with a small amount, but convenience can also encourage frequent trading. A micro-investing strategy should normally focus on consistent contributions and an appropriate long-term portfolio, not constant buying and selling.

• Best for: Self-directed investors who want a mobile brokerage with small-dollar investing features.
• Starting amount: Review current minimums, eligible securities, and account requirements.
• Watch out for: Trading risk, options and margin features, promotional conditions, transfer rules, and confusing trading activity with long-term investing.

If you use a self-directed brokerage, consider avoiding features that do not match your experience or risk tolerance. An easy-to-use app can still provide access to high-risk products.

4. Public

Public is an investing platform that has offered fractional investing and a range of investment products for eligible users. Its features and product availability may include stocks, exchange-traded funds, Treasury-related products, or other offerings depending on current account terms and eligibility.

Public may be attractive to people who want to invest small amounts while learning about companies and markets. As with other self-directed platforms, social or community features should not be treated as a substitute for independent research.

• Best for: Investors who want fractional investing and a modern brokerage experience.
• Starting amount: Check current minimums and which investments support fractional purchases.
• Watch out for: Product-specific risks, account fees, community commentary, and the difference between a promotional offer and a permanent account feature.

Before buying an investment, understand what it owns, how it makes money, what could cause it to lose value, and how it fits into your overall plan.

5. Fidelity Investments

Fidelity is a large U.S. brokerage and retirement-services company that offers fractional investing for eligible stocks and exchange-traded funds through certain account features. It also provides brokerage accounts, IRAs, educational resources, mutual funds, and other investment services.

Fidelity is not exclusively a micro-investing app, but its fractional-share functionality and low minimums can make it a strong choice for someone who wants to start small and eventually expand into retirement or taxable investing.

• Best for: Beginners who want a broad brokerage platform that can grow with them.
• Starting amount: Review current minimums for brokerage accounts, mutual funds, and recurring investment features.
• Watch out for: The larger number of choices, tax considerations, account-type differences, and selecting investments without understanding them.

Fidelity can be a good long-term home for an account, but beginners should start with a simple, understandable investment approach rather than trying every available feature.

6. Charles Schwab

Charles Schwab is another full-service U.S. brokerage that offers low-dollar investing features, including Schwab Stock Slices for eligible stocks. This allows investors to purchase fractional shares of selected companies rather than needing enough money for a full share.

Schwab may be useful if you want a mainstream brokerage with banking and retirement options in addition to small-dollar stock investing. The fractional-share feature is not the same as a diversified managed portfolio, so you still need to think about asset allocation.

• Best for: Investors who want an established brokerage and occasional fractional stock purchases.
• Starting amount: Check current account minimums and the list of eligible investments.
• Watch out for: Concentration in individual stocks, feature-specific restrictions, and confusing a low share price with a low-risk investment.

A $5 fractional purchase of one company is still exposure to one company. Diversification depends on what you own, not how little you paid for each position.

7. Betterment

Betterment is a robo-advisor that creates and manages diversified portfolios for eligible U.S. customers based on goals and risk preferences. It is not primarily a round-up app, but it can support small recurring contributions and automated investing.

Betterment may be a better fit than a self-directed brokerage if you want help with portfolio construction, automatic rebalancing, and goal-based investing. The management fee and fund expenses should be included in your comparison.

• Best for: Beginners who prefer an automated, diversified portfolio.
• Starting amount: Check the current minimum deposit and plan requirements.
• Watch out for: Advisory fees, fund expenses, tax implications, portfolio assumptions, and investments that can still decline in value.

Automation can reduce the temptation to make emotional decisions, but it does not eliminate market risk. Choose a portfolio that matches the time until you need the money.

8. Wealthfront

Wealthfront is a robo-advisor and financial-planning platform that offers automated investing for eligible U.S. customers. Users generally complete a risk questionnaire and receive a portfolio based on their goals and preferences. The service may also provide cash-management and planning tools under current product terms.

Wealthfront is more suitable for someone who wants a managed portfolio than for someone who wants to trade individual stocks. It may be especially useful for investors who value automated deposits and a set-it-and-review-it approach.

• Best for: Hands-off investors who want automated portfolio management.
• Starting amount: Confirm the current minimum investment and account eligibility.
• Watch out for: Advisory fees, fund costs, risk settings, withdrawal rules, and whether the service fits your account size.

Review your risk questionnaire when your circumstances change. A portfolio that suited you before a major life event may no longer be appropriate.

9. M1

M1 is an automated investing platform that allows eligible users to build portfolios from selected stocks and exchange-traded funds. Its “pie” approach lets you assign target percentages to different investments, then make recurring contributions that can be allocated according to those targets.

M1 can appeal to investors who want more control than a traditional robo-advisor while still automating contributions and portfolio maintenance. It requires more decision-making than a simple round-up app.

• Best for: Investors who want customized portfolios with automated contributions.
• Starting amount: Check current minimums for taxable and retirement accounts.
• Watch out for: Portfolio construction mistakes, account and membership fees, trading limitations, and investing in too many overlapping funds.

Before building a portfolio, look at the holdings inside each fund. Several funds with different names can still own many of the same companies.

10. SoFi Invest

SoFi Invest provides eligible U.S. customers with brokerage and automated investing features. Depending on the account and current terms, users may be able to invest in stocks, exchange-traded funds, fractional shares, or managed portfolios.

SoFi can be convenient for people who already use its broader range of financial services. The convenience of having multiple services in one app should not prevent you from comparing the investment account, fees, protections, and available choices.

• Best for: Beginners who want investing and other financial services in one platform.
• Starting amount: Verify current minimums and eligibility for each investing option.
• Watch out for: Product-specific terms, promotional offers, self-directed investing risk, and mixing short-term financial needs with long-term investments.

Keep money you may need soon in an appropriate savings vehicle rather than placing it in a stock portfolio simply because the app makes investing easy.

11. Greenlight Investing

Greenlight is a family-focused financial platform that may offer investing features connected with eligible family accounts. Its investing tools are designed to help parents and children learn about money, saving, and investing under parental supervision.

This can be useful for families that want to teach investing through a controlled account experience. Parents should review the current subscription, account ownership, investment options, custodial details, and educational features before enrolling.

• Best for: Families introducing children or teenagers to basic investing concepts.
• Starting amount: Check the current plan and investment requirements.
• Watch out for: Subscription costs, age and custodial rules, account ownership, and treating a learning account as a substitute for a complete family financial plan.

Use the account as a teaching tool. Explain diversification, risk, taxes, fees, and long-term thinking instead of presenting investing as a guaranteed way to make money.

12. TreasuryDirect

TreasuryDirect is the U.S. government platform for buying eligible Treasury securities directly from the U.S. Department of the Treasury. It is not a typical micro-investing app, and it does not offer round-ups or a stock-trading interface. However, it can be relevant to small-dollar investors who want to explore Treasury securities rather than stocks.

Depending on the security, Treasury investments can have different terms, rates, liquidity considerations, and inflation-related features. They are not identical to a savings account or a diversified stock portfolio.

• Best for: U.S. investors researching direct Treasury purchases with money they can leave invested according to the security’s terms.
• Starting amount: Check the current minimum purchase amount and eligible security types.
• Watch out for: Maturity dates, early-sale limitations, interest-rate changes, tax treatment, and account-management requirements.

Treasury securities may have a different role from stock investments. Decide whether your goal is growth, capital preservation, income, inflation protection, or a combination.

How to Choose a Micro-Investing App

The app with the most attractive design is not necessarily the right choice. Compare the following factors before opening an account.

Fees

Check subscription fees, advisory fees, fund expense ratios, transfer fees, account-closing charges, and any fees associated with optional features. A $3 monthly charge equals $36 per year. On a $300 account, that is a significant percentage before investment performance is considered.

Investment choices

Some platforms provide diversified model portfolios. Others allow you to buy individual stocks, funds, bonds, or other products. More choices are not always better for a beginner. Look for investments you understand and that match your time horizon.

Automation

Consider whether the app supports scheduled deposits, recurring investments, portfolio rebalancing, dividend reinvestment, or round-ups. Automation can help turn investing into a habit, but review your bank balance so automatic transfers do not cause overdrafts or disrupt essential bills.

Account type

A taxable brokerage account, traditional IRA, Roth IRA, custodial account, and other account types have different rules. A micro-investing app may offer one or several of these. See Roth IRA vs. Taxable Brokerage Account for Beginners for how to think through that specific choice. The right account depends on your goal, eligibility, withdrawal needs, income, and tax situation.

Security and protection

Use a strong unique password and two-factor authentication. Confirm which regulated entity provides brokerage services and what protections may apply. Securities are not protected from market losses simply because an app is popular or easy to use. The SEC’s Investor.gov has free, official guidance on protecting your investment accounts.

Is Micro-Investing Worth It?

Micro-investing can be worthwhile when it helps you begin a consistent investing habit at a cost you understand. A recurring $10 contribution is better than waiting indefinitely for the “perfect” time to start. See Compound Growth Explained With Realistic Investing Examples for why that consistency matters more over time than the size of any single contribution.

However, micro-investing should not come before basic financial stability. Consider building an emergency fund, paying attention to high-interest debt, obtaining appropriate insurance, and contributing to an employer retirement plan when available. Read How to Balance Emergency Savings, Debt, and Investing if you’re not sure how to weigh these against each other, since investing a few dollars while regularly paying high interest on credit-card debt may not be the most effective use of your money.

Also remember that round-ups alone may produce very small contributions. If you want to build a meaningful balance, combine round-ups with a recurring deposit that fits your budget, similar to the approach in How to Build an Investing Portfolio With Just $10 a Week.

Common Micro-Investing Mistakes

• Ignoring fees: Fixed monthly charges can have a large effect on a small account.
• Buying random stocks: Fractional shares make access easier but do not remove company-specific risk.
• Investing emergency money: Market investments can fall when you need to withdraw.
• Checking the app constantly: Frequent price changes can encourage emotional decisions.
• Forgetting taxes: Taxable sales, dividends, and other activity may have tax consequences.
• Using too many apps: Multiple accounts can make fees, allocations, and tax records harder to track.
• Chasing bonuses: A sign-up reward should not determine your long-term investment strategy.
• Assuming small means safe: A $1 investment can still lose most or all of its value if it is concentrated in a risky asset.

A Simple Way to Get Started

1. Define the purpose. Decide whether you are investing for retirement, a long-term goal, education, general wealth building, or learning.
2. Choose an affordable amount. Start with a contribution that will not interfere with rent, bills, debt payments, or emergency savings.
3. Compare total costs. Include subscriptions, management fees, fund expenses, and possible transfer charges.
4. Choose an appropriate account. Do not assume a taxable account is automatically the best option.
5. Use diversified investments when appropriate. Understand the difference between a broad fund and a single company.
6. Automate carefully. Confirm that scheduled deposits will not create cash-flow problems.
7. Review periodically. Check fees, contributions, investment choices, and account security without reacting to every daily market movement.

Micro-Investing FAQ

In Summary

The best micro-investing apps in the United States make it easier to start with small amounts, automate contributions, purchase fractional shares, or access a managed portfolio. Acorns and Stash may appeal to beginners who want a dedicated micro-investing experience. Fidelity, Charles Schwab, Robinhood, Public, and SoFi can provide small-dollar self-directed investing features. Betterment, Wealthfront, and M1 offer more automated portfolio approaches, while Greenlight can support family investing education.

There is no universal best app. The right choice depends on how much you can invest, whether you want to choose investments yourself, what account type you need, and how the fees compare with your balance. A simple app used consistently can be more valuable than a sophisticated platform you do not understand.

Start small if that is what your budget allows, but keep your expectations realistic. Micro-investing is a way to build access and habits, not a shortcut to guaranteed wealth. If you’re not sure where the money would come from in the first place, 15 Practical Ways to Start Investing With Money You Already Have covers that groundwork, and How to Automate Saving, Spending, and Investing covers how to keep the contributions running without having to think about them every week. Read the current terms, understand the risks, protect your account, and increase your contributions only when your wider financial situation allows it.

Join The Side Hustler Community

Get exclusive financial insights, expert tips, and inspiring stories delivered weekly.

Your privacy is respected – unsubscribe anytime.

About Lee Warren-Blake

Hi, I'm Lee Warren-Blake. A serious health scare a few years back made me rethink spending my life at a desk for someone else, and The Side Hustler is what I built instead. I run this blog largely off Pinterest traffic, and I write about the same things I actually use every week: email marketing, affiliate marketing, and building an income that doesn't chain you to a desk. Before this, I ran my own online shop for the better part of a decade, so building something from scratch isn't new to me. Everything here comes from what's actually worked for me, not theory.