{"about":{"summary":"A directory of side businesses that real people say they run, each summarized in our words and linked to its public source.","notes":["Sources are public, first-person accounts: interviews, podcasts and community threads.","Cost, time and the other tags are machine estimates, each with a confidence score.","Income figures are the owner's own claim. We don't verify them."],"how_to_cite":"Link the idea page and its source. Call income figures the owner's unverified claim, and cost and time estimates."},"idea":{"slug":"paid-physics-puzzles-android-app-fb09be","title":"Paid physics puzzles Android app","summary":"A paid Android app with a list of physics puzzles, built as a learning project and earning small steady income.","url":"https://allsidehustleideas.com/ideas/paid-physics-puzzles-android-app-fb09be","markdown_url":"https://allsidehustleideas.com/ideas/paid-physics-puzzles-android-app-fb09be.md","tags":{"category":{"value":"software","label":"Software and apps","confidence":0.94},"earns_from":{"value":"one-time","label":"One-time sales","confidence":0.97},"startup_cost_estimate":{"value":"under-100","label":"Under $100","confidence":0.76},"time_estimate":{"value":"hands-off","label":"Hands-off","confidence":0.97},"where":{"value":"online","label":"Online","confidence":0.98},"needs_coding":{"value":true,"confidence":0.97}},"owner_reported":null,"source":{"publication":"Hacker News","title":"Your best passive income? (2014)","url":"https://news.ycombinator.com/item?id=7098060","person":"iluvmylife","host":null,"date":"2014-01-21"},"owner_site":"https://play.google.com/store/apps/details?id=com.boredominnovations.physicspuzzles"}}