# Call filtering app for phones

An app that filters unimportant calls and lets urgent ones from chosen contacts through. Sold as a paid app.

| Tag | Value | Confidence |
|---|---|---|
| Category | Software and apps | 97% |
| Earns from | One-time sales | 93% |
| Startup cost (estimate) | $100 to $1k | 49% (low) |
| Time (estimate) | Hands-off | 71% |
| Where | Online | 96% |
| Coding | Needs coding | 99% |

Source: [Ask HN: Are you working on any side projects that make "small/passive" income?](https://news.ycombinator.com/item?id=2358771), Hacker News, kschua, 2011-03-23
Page: https://allsidehustleideas.com/ideas/call-filtering-app-for-phones-034eae

## About this data

- 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.
- Link the idea page and its source. Call income figures the owner's unverified claim, and cost and time estimates.