DroidCam, Iriun and Camo are good, mature products; people use them happily. The difference is the model. CatCam has no paid tier, so there is nothing to unlock: no watermark to remove, no resolution to buy back, no subscription. The code is public.
| Price | Watermark | What free gets you | Account or cloud | Source | |
|---|---|---|---|---|---|
| CatCam | Free, entirely | None | Everything: Wi-Fi + USB, mic, zoom, night mode | None, video stays on your network | Open, GPL-2.0 |
| DroidCam | Free at SD, Pro in-app purchase | On HD until Pro | Standard-definition video, core features | No account needed | Closed |
| Iriun | Free, one-time Pro unlock | Small logo until Pro | All connection modes, watermarked video | No account needed | Closed |
| Camo | Free tier, Pro subscription or lifetime | Overlay controls sit in Pro | Up to 720p | Optional | Closed |
Checked 2026-08 against each vendor's own site; details move, their pages are authoritative. Fairness note: all three support iPhone and macOS, which CatCam does not. CatCam is Windows 11 + Android, and younger.