All Side Hustle Ideas

Software and apps side hustle ideas

A web app, SaaS, mobile app, browser extension, bot or API that people pay for or that earns from ads.

127 ideas, page 1 of 3

  • Software and apps
    The operator runs a few near-identical sites that each sell access to a niche database, such as investors, angels or journalists. The revenue model is not stated in the source and is likely paid access.
    Online
    Starter Story, 2026
  • Software and apps
    After leaving an agency, the operator built a directory-related software tool that earns recurring revenue and is adding a lead-gen angle.
    Online
    Niche Pursuits Podcast, 2026
  • Software and apps
    A website for visualizing road trips, earning sales through organic traffic with peaks around holidays.
    Hands-offOnline
    Hacker News, 2024
  • Software and apps
    Builds browser extensions that fix common site annoyances. Revenue comes from them, helped by search-friendly names and store reviews.
    Under $100Hands-offOnline
    Hacker News, 2024
  • Software and apps
    A minimalist Android launcher distributed free, with a paid pro version.
    Online
    Hacker News, 2024
  • Software and apps
    A free web tool for converting text case, built up over years.
    Online
    Hacker News, 2024
  • Software and apps
    A checklist app built for the owner's own routines that now earns recurring income.
    Hands-offOnline
    Hacker News, 2024
  • Software and apps
    A browser extension that automatically claims daily login bonuses at online casinos for a monthly subscription.
    Online
    Hacker News, 2024
  • Software and apps
    A random number service sold through a website and a cloud marketplace listing, left running with little attention.
    Hands-offOnline
    Hacker News, 2024
  • Software and apps
    A GIF meme site that earns from one-off sales of watermark removal.
    Hands-offOnline
    Hacker News, 2024
  • Software and apps
    Built an algorithm using maritime trade data to trade options on shipping firms, also selling subscriptions to friends.
    Online
    Hacker News, 2024
  • Software and apps
    Built an online multiplayer version of a domino-based game, funded by donations after ads did poorly.
    Online
    Hacker News, 2022
  • Software and apps
    Built a single-player chess variant app without ads or in-app purchases, supported mostly by donations.
    Hands-offOnline
    Hacker News, 2022
  • Software and apps
    Began hosting game servers for friends, grew into renting servers including scientific computing to universities.
    Over $10kHands-offOnline
    Hacker News, 2022
  • Software and apps
    Built a compression tool that was slow to compress but fast to decompress and licensed it to big software vendors who shipped floppy disks.
    Hands-off
    Hacker News, 2022
  • Software and apps
    Created a web tool for making GIF memes with text that follows motion, after finding it hard to do elsewhere.
    Hands-offOnline
    Hacker News, 2022
  • Software and apps
    Started a niche credit card processor that has made money for many years.
    Online
    Hacker News, 2022
  • Software and apps
    A web app that pulls transaction data out of PDF bank statements, built after the owner needed it for personal spending analysis.
    Online
    Hacker News, 2022
  • Software and apps
    Wrote embedded software and earned a royalty on every device shipped for many years.
    Hands-offOnline
    Hacker News, 2022
  • Software and apps
    Builds small apps and games for niche audiences and earns by adding paid features and selling ad space.
    Online
    Hacker News, 2022
  • Software and apps
    Software that ties game stats to video footage for coaches, sold to schools in many states.
    Hands-offOnline
    Hacker News, 2022
  • Software and apps
    Built a small tool that emails a weekly digest of newly saved Twitter bookmarks, with paid subscribers.
    Hands-offOnline
    Hacker News, 2022
  • Software and apps
    A coupon site for developers plus a set of single-purpose web tools such as encoders and HTML cleaners.
    Hands-offOnline
    Hacker News, 2021
  • Software and apps
    A paid Mac App Store app that grew out of a personal need for a Safari extension that refreshes tabs automatically.
    Hands-offOnline
    Hacker News, 2021
  • Software and apps
    Wrote a Mac app years ago that still makes steady daily sales through the app store without marketing.
    Hands-offOnline
    Hacker News, 2020
  • Software and apps
    Built a web tool for stock technical analysis and offered it white-labeled to companies with distribution, splitting profits with them.
    Hands-offOnline
    Hacker News, 2019
  • Software and apps
    Built a service with an API that lets businesses send cookies to customers and partners across Europe and the US.
    Online
    Hacker News, 2019
  • Software and apps
    An open source API that generates embeddable chart images and QR codes. Monetized as a hosted service.
    Hands-offOnline
    Hacker News, 2019
  • Software and apps
    Runs a subscription service that lets sites display announcement banners.
    Hands-offOnline
    Hacker News, 2019
  • Software and apps
    An independent wedding registry site for a local market. Couples pay a one-time activation fee, and Google ads bring in traffic.
    $1k to $10kHands-offOnline
    Hacker News, 2019
  • Software and apps
    Built a desktop app for managing video libraries and sells licenses. Donates the proceeds to charity.
    Hands-offOnline
    Hacker News, 2019
  • Software and apps
    A web tool that lets esports teams create mascot style gaming logos, currently in private beta.
    Online
    Hacker News, 2019
  • Software and apps
    Collects small monthly support on Patreon for a niche open source game.
    Under $100Online
    Hacker News, 2019
  • Software and apps
    An outgoing text message API with flat pricing, small packages for hobbyists, and a free daily message. Has an open source version.
    Hands-offOnline
    Hacker News, 2019
  • Software and apps
    A team calendar software product that earns recurring revenue and could grow with more marketing.
    $1k to $10kOnline
    Hacker News, 2019
  • Software and apps
    Sells a web service that randomly sends text reminders for kids to call their parents or for adults to call theirs.
    Hands-offOnline
    Hacker News, 2019
  • Software and apps
    A few games the owner published that continue to sell a little each year without any input.
    Hands-offOnline
    Hacker News, 2019
  • Software and apps
    Built a stock trading model for personal use, then published it on a platform where subscribers pay to follow it. Subscribers take responsibility for any trades.
    Hands-offOnline
    Hacker News, 2018
  • Software and apps
    Built a documentation product that earned its first revenue with little maintenance, and is planning a second version.
    Hands-offOnline
    Hacker News, 2018
  • Software and apps
    Publishes several Android apps on Google Play. One got an editor's pick, which boosted sales for a while.
    Hands-offOnline
    Hacker News, 2018
  • Software and apps
    Built a web-based synth and drum machine that is free as a demo. Sells a downloadable desktop version without the restrictions.
    Hands-offOnline
    Hacker News, 2016
  • Software and apps
    Sells a cross-platform desktop task manager with a Kanban-style board, through a trial-based license on Gumroad and the Mac App Store.
    Hands-offOnline
    Hacker News, 2016
  • Software and apps
    Runs a site showing historical average weather by city and month. Income so far is from ad revenue, with plans to add more features.
    Online
    Hacker News, 2016
  • Software and apps
    A competitor monitoring product that began as a side project and grew into a systemised business with a team, so the owner now acts more like an investor.
    Hands-offOnline
    Hacker News, 2016
  • Software and apps
    Built a simple CMS and CRM for a freelance client and set up automated billing per user. Income grows as the client's user base grows.
    Hands-offOnline
    Hacker News, 2016
  • Software and apps
    A subscription tool that watches DNS zones for changes and alerts the owner, keeping a revision history. Aimed at people who manage DNS for clients.
    Online
    Hacker News, 2016
  • Software and apps
    Built a document management and review web app for a large company and gets a monthly maintenance fee, needing very little time each month.
    Hands-offOnline
    Hacker News, 2016
  • Software and apps
    Built a tool that takes a keyword, translates it into many languages and shows available .com domains. It has earned some revenue from users.
    Hands-offOnline
    Hacker News, 2016