Set It & Forget Investment Strategy

M1 Finance is a popular app known for its fractional share investing, automated portfolio rebalancing, and the ability to create customized portfolios. It allows you to set up your investment strategy and forget about it after developing a budget. By automating the process, you can stay on track with your financial goals without constant monitoring. 

If you're looking for similar apps with these features and the convenience of "set it and forget it" after establishing your budget, here are some options to consider:

1. **Robinhood**: Robinhood offers commission-free investing, fractional shares, and a user-friendly interface, making it easy to set up and manage your investment strategy within your budget.

2. **Wealthfront**: As a robo-advisor, Wealthfront automatically manages your portfolio based on your risk tolerance and financial goals, allowing you to establish a budget and let the app take care of the rest.

3. **Acorns**: Acorns' micro-investing approach, where it rounds up your purchases and invests the spare change, allows you to effortlessly contribute to your investment goals without constant intervention.

4. **Betterment**: With automated portfolio management and personalized advice, Betterment enables you to create a budget and leave the day-to-day management to the app's algorithms.

5. **Stash**: Stash offers themed ETF portfolios to help you align your investments with your budget and financial objectives, reducing the need for continuous monitoring.

6. **SoFi Invest**: SoFi's all-in-one app combines investment options with retirement accounts and cash management, providing a comprehensive solution to help you stick to your budget.

7. **Schwab Intelligent Portfolios**: Schwab's robo-advisor simplifies investing and portfolio management, making it easier to stick to your budget without constant adjustments.

Remember that these app features may evolve over time, so it's essential to check their latest offerings and reviews to ensure they align with your financial goals and budgeting preferences. Additionally, the financial app market is continuously changing, so exploring new options may unveil even more suitable choices for your investment needs.