Is "voice agent" a good niche?

Risky — "voice agent" is a crowded market. Apps average 4.1⭐ with a Zombie Score of 30/100. There's some user dissatisfaction, but enough decent options exist that you'd need a clear differentiator to break through.

The "voice agent" market on the iOS App Store has an estimated 357K users across 19 apps in the Photo & Video category. With 357K estimated users, demand is clearly validated — the question is execution, not market size.

Overcrowded doesn't mean impossible — but it means the generic approach won't work. Target a specific underserved sub-audience rather than competing on features. A niche-within-a-niche often beats a head-on fight with established apps.