Share your honest feedback on products, websites, and experiences through usability tests and surveys directly from your phone. No logins are required, making it quick and easy to make a real impact on product development.


248+ iOS apps & games curated and reviewed
Optimal Participant is the household name in participant research platform, but it's far from the only option. We track 248+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 1.0★ (1) | No | No | Sep 2026 | ||
| 2 | Free | — | No | No | Sep 2026 | ||
| 3 | Free | 4.4★ (3.6K) | No | No | Oct 2026 | ||
| 4 | Free | 4.8★ (22K) | Yes | No | Oct 2026 | ||
| 5 | Free | — | No | No | Aug 2026 | ||
| 6 | Free | — | No | No | May 2026 | ||
| 7 | Free | 2.3★ (10) | No | No | Oct 2026 | ||
| 8 | Free | 4.6★ (42) | No | No | Sep 2026 |


Share your honest feedback on products, websites, and experiences through usability tests and surveys directly from your phone. No logins are required, making it quick and easy to make a real impact on product development.












Get paid real cash for providing in-depth feedback on products and services. Participate in various study types, from quick missions to multi-day projects and live interviews. Your insights help companies improve their offerings.