Is "Affiliate program" a good niche?

Risky — "Affiliate program" is a crowded market. Apps average 4.1⭐ with a Zombie Score of 29/100. There's some user dissatisfaction, but enough decent options exist that you'd need a clear differentiator to break through.

The "Affiliate program" market on the iOS App Store has an estimated 114K users across 20 apps in the Productivity category. With 114K 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.