The Side Hustle Nobody Talks About: Building Apps and Actually Selling Them

The run-throughs for side hustle tips go something like this: Work as a rideshare driver, sell items from your nearby thrift store, open a print-on-demand business. Fine options. However, there is a ceiling: Once they stop working, the money stops. But there’s another type of game that’s quieter, and the guys that do it don’t flaunt it on the internet since they don’t want to be in the way: small apps and selling them for a fixed price. This mindset of doing something useful and sustainable can influence people’s dating attitudes in the modern era, where real relationships are built on genuine endeavours instead of the flash of results. 

While not all relationships are about getting a date, developing skills, confidence, and a happy life after dating can lead to a more robust relationship. It might be a daunting combination to anyone who thinks of Silicon Valley and venture capital. Forget that image. Applications that are small, specific, a habit tracker, a niche calculator, a simple game – something that one person or maybe a handful of people can build in a couple of weeks, and the buyer will pay real money for a copy of it that he/she will own in full. Rather than grinding for tips, you’re creating a small asset and cashing it out.

Why Selling Beats Endless Operating

Here’s the mindset shift. A traditional side gig pays you for your time. An app you build and then sell pays you for the thing you made, whether or not you keep showing up. When you decide to sell application, if you’re not going to give your life away forever to projects, then you’re doing a bit of rolling over that payday, and that experience with it. There are marketplaces dedicated to exactly this: you post the app on the marketplace, they do their homework, and it’s money exchanged in the same manner that the money is exchanged when you sell a small website, or even a domain. 

The developer that’s better at building than running ads does it for him; the buyer that’s good at scaling gets a product that already works. All players are playing to their strengths. This is no longer a fringe behavior. As more Americans than ever have some sort of side income stream, Pew Research has documented, and a growing share of them are digital products rather than gig-economy hours. Apps just happen to be one of the few side projects that come with a built-in exit. (For readers still choosing a lane, see our roundup of [side hustle ideas,  internal link] and our guide to [building passive income streams,  internal link].)

The Four-Step Version

You don’t need a computer-science degree. You need a plan and the discipline to finish. The loop looks like this:

1. Pick a boring, specific problem: The winners are rarely glamorous. Tip calculators, sobriety counters, workout timers, exam-prep quizzes for a specific certification — narrow beats clever. A tight niche is easier to build and easier to sell because the audience is obvious.
2. Build lean: Use a game engine or a no-code/low-code tool if you can’t write it yourself, or buy a ready-made base and rebrand it. The goal is a real, working product, not a masterpiece.
3. Get a little traction: Even a few thousand installs and a small, steady trickle of revenue transforms your app from “idea” to “asset.” Buyers pay for proof, not potential.
4. Sell it: List it on a reputable marketplace, present the numbers honestly, and let genuine market interest determine its value. The same principle can carry into dating: being transparent about what you bring to a relationship creates a stronger foundation than trying to present an inflated version of yourself. 

What Your App is Actually Worth

This is where most first-timers either lowball themselves or fantasize. The reality is unsexy and predictable. Small digital businesses usually sell for a multiple of their profit, the same principle behind any business valuation. An app clearing a few hundred dollars a month in reliable revenue is worth a meaningful multiple of that monthly figure, and the multiple climbs when the income is stable, diversified, and easy to hand over. Translation: two apps earning the same amount can be worth very different sums. The one with subscription revenue and strong retention beats the one living off a single fragile ad network. If you want a bigger check, you don’t necessarily need more users; you need better revenue and cleaner operations.

The Traps to Avoid

A few honest warnings, because this isn’t free money:

• Don’t fake the numbers: Buyers verify. One inflated metric kills the deal and your reputation.
• Don’t tie everything to one channel: If an app is NOT growing through multiple ad sources, it’s not a jackpot; it’s a discount.
• Don’t have any clutter in the code: The purchaser is responsible for the upkeep of it. Clean and well-documented work is valued.
• Know what you’re selling: Be crystal clear about whether the developer account, the source code, and the assets are all included. Ambiguity scares buyers off.

The Real Appeal

The best part of this hustle isn’t one sale; it’s the successive sales you make. It’s experience that has a compounding effect. Make, sell, cash in the lessons, and make a little even better each time! The first app could earn a couple of hundred dollars; the fifth may be a different story altogether, with a different pitch, due to all things learned in between. The same learning and growth can be applied to dating, as each experience brings more knowledge for emotional support on how to communicate, be compatible, set boundaries, and form a connection that is desired.  

It encourages the very same qualities a self-improvement community admires: determination, talent development, and dedication to finish. It’s not necessary to leave your job or look for a unicorn. All you need to do is come up with something small and helpful, showcase its utility, and be prepared to let it go for the right price, much like someone who sells franchise opportunities by presenting a proven concept with clear value. This is a side hustle that has a definite end and a payoff at the end.