9 Popular Fintech Apps Worth Learning From

Digital finance is part of everyday life: people pay, save, invest, borrow and send money abroad from their phones. If you are looking for ideas for a fintech startup, the best teachers are products that already found their audience. Below are nine well-known fintech apps. For each, we look at the idea that made it work, its core features and how it makes money. The list is not a ranking, and products change often, so treat the details as a description of each model rather than of the latest version.

Nine Fintech Apps and What They Teach

1. Mint

Mint was one of the pioneers of personal budget management. It started as a web application and gained an audience even before launch through content marketing: an educational blog with in-depth articles on personal finance and Q&A sessions with experts built a loyal following before the product existed. Intuit acquired Mint in 2009 and later moved its users to Credit Karma, another Intuit product.

Core idea: all of a person's accounts in one place, with automatic categorization of spending.

Typical features: a personalized budget planner, account aggregation, automatic transaction categorization, credit score tracking, investment tracking, bill reminders and alerts about overspending or unusual activity.

Business model: free for users; revenue from advertising and referrals to third-party financial products.

Lesson: automatic categorization was the heart of the product — and also its most visible weakness when it made mistakes. In personal finance, data accuracy is the product.

2. Acorns

Acorns combines a robo-advisor with a savings tool. Its portfolios were designed with input from a Nobel Prize–winning economist, and it targets young people who want to start saving through micro-investments. The signature idea was round-ups: purchases are rounded up to the nearest dollar and the spare change is invested automatically.

Core idea: investing that requires almost no effort or starting capital.

Typical features: automatic round-up investing, a choice of portfolios, retirement accounts with recurring contributions, investment accounts for children, educational materials and cashback from partner brands.

Business model: monthly subscription tiers and partner referrals.

Lesson: one simple, memorable mechanic can be enough to win a market segment.

3. Revolut

Revolut began with mobile banking and currency exchange combined with personal finance tools. The idea came from its founder's own frustration with high exchange fees while traveling in Europe. Saving on fees attracted many users, and the app grew from Europe to other regions.

Core idea: a multi-currency account with fair exchange rates in an app.

Typical features: physical and virtual cards, spending in many currencies, money transfers, splitting bills with friends, spending analytics and, in many markets, crypto and investment features.

Business model: transaction and exchange fees, add-on services and paid subscription plans.

Lesson: start with one painful, frequent problem; broaden the product once users trust you.

4. Nubank

Nubank is a Brazilian digital bank. A key factor in its success was the choice of niche: Brazil's banking market had limited choice, high fees and inconvenient service, and many customers were dissatisfied. Nubank started with a no-fee credit card managed entirely from an app and expanded into a full digital bank and to other Latin American countries, including Mexico.

Core idea: simple, fee-free banking in a market dominated by expensive incumbents.

Typical features: a digital bank account, a credit card with a debit function, transfers, cash withdrawals and loans.

Business model: interchange and transaction fees, and interest on credit and loans.

Lesson: the right market can matter more than a novel feature. Where incumbents are weak, a well-executed basic product wins.

5. Chime

Chime is a US mobile banking app with no physical branches. It is a financial technology company rather than a bank: the banking services behind its accounts are provided by partner banks.

Core idea: no-fee everyday banking for people underserved by traditional banks.

Typical features: spending and savings accounts, automatic savings options such as round-ups, a debit card, fee-free overdraft protection up to a limit, peer-to-peer payments between members and the ability to lock the card from the app.

Business model: mainly interchange fees on card transactions.

Lesson: partnering with licensed banks lets a fintech focus on product and customer experience.

6. MoneyLion

MoneyLion combines mobile banking, personal finance management, automated investing and loans. Most of its customers are in the US, and many come to it looking for an easier way to build or improve their credit score.

Core idea: one app for everyday banking, credit building and investing.

Typical features: a banking account with early paycheck access, credit-builder loans, small cash advances, automated investing with preset portfolios and debit cards.

Business model: loans, membership fees and partner offers.

Lesson: a clear audience — people trying to improve their credit — can tie many financial products into one coherent offer.

7. SoFi

SoFi (Social Finance) started with student loan refinancing and grew into a broad digital finance platform. It aimed at young professionals and used career services and community events as part of its marketing.

Core idea: a financial home for young professionals, starting from student loans.

Typical features: checking and savings accounts, automated and self-directed investing, personal finance tracking, personal and student loans, and access to financial advisors.

Business model: interest on loans, fees and financial services.

Lesson: a single product with high value (refinancing) can become the entry point to a full platform.

8. Affirm

Affirm is a buy-now-pay-later service popular for online shopping. It offers point-of-sale loans that let customers split purchases into installments. Affirm built its brand on transparent terms, showing the total cost upfront and not charging late fees.

Core idea: honest, transparent consumer credit at checkout.

Typical features: installment loans over different terms, instant decisions at checkout, integrations with online stores and a shopping app.

Business model: fees from merchants and interest on some loans.

Lesson: in a category users distrust, transparency itself can be the competitive advantage.

9. Wise (formerly TransferWise)

Wise, founded in London as TransferWise and later renamed, is an online service for currency exchange and international money transfers. A wide range of currencies, low fees and a simple app made it a go-to option for users in many countries.

Core idea: international transfers at the real exchange rate with transparent fees.

Typical features: multi-currency accounts, international transfers, holding balances in several currencies and a debit card.

Business model: transparent transaction fees.

Lesson: showing exactly what a transfer costs, compared with hidden margins elsewhere, built trust and growth.

The Nine Apps at a Glance

Where AI Fits in Products Like These

Many of these apps rely on automation that increasingly involves machine learning. Realistic uses:

• Transaction categorization. Sorting spending into categories, as Mint did — and as Mint's users noticed, errors here are highly visible.
• Fraud and anomaly detection. Flagging unusual transactions before they cause losses.
• Credit decisions. Supporting instant lending decisions at checkout or for small loans.
• Document extraction. Reading IDs, pay slips and statements during onboarding.
• Support assistants grounded in your data. Answering questions from your own fee schedules, product rules and the customer's account, and handing complex cases to a person.

What to watch: evaluate on real customer data, not demos; send uncertain cases to a human, especially decisions about credit or account access; keep financial data within the limits regulators and users expect; and track running costs as usage grows.

Lessons for Founders

Demand for new financial products keeps growing — from neobanks to mortgage apps. A few patterns repeat across the apps above:

• Start from one painful problem — exchange fees, overdraft fees, opaque credit — and solve it better than anyone else.
• Pick the market deliberately. Weak incumbents or an underserved audience give you room to grow.
• Make trust visible. Transparent pricing, reliable data and responsive support matter more in finance than in almost any other category.

Before building, define what success looks like in numbers — sign-ups, activation, retention or transaction volume — and test the core idea with a small pilot or MVP. Our guide on how to build a fintech app covers the full process.

Fintech Apps FAQ for Founders

What is a fintech application?

"Fintech application" is an umbrella term for software that carries out or simplifies financial operations. It includes mobile payment and budgeting apps, digital banks, lending and buy-now-pay-later services, money transfer services, and platforms for stock or cryptocurrency trading.

How do fintech apps make money?

The most common sources are transaction and interchange fees, interest on loans, subscription or membership fees, advertising, and referrals to third-party financial products.

How do you create a fintech app?

Choose a niche and an idea that makes your product distinctive, check the regulatory requirements early, then choose the technology and build a minimum viable product. Our detailed guide on how to create a fintech app walks through every step.

How much does it cost to develop a fintech app?

It depends on the functionality, the platforms, the integrations with banks and payment providers, compliance and security requirements, and support after launch. We price each stage after an outcome brief, once both sides know what is being built and why.