42
air quality monitor
Skip itPrices mostly outside the sweet spot ($48.70–$1336.08) — this niche doesn't clear our bar today.
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Review moat
Great451.19avg incumbent reviews — the moat a new listing must climb
Brand share
Good68%top-5 brand share — brands hold most of the demand
Returns
Okay3.2%return rate — above 5% kills the launch gate
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Market size
Okay$161K$161K/yr · 24K searches
Avg price
Okay$306.22avg listing price — sweet spot $15–$100
Conversion
Okay2.2%search→purchase rate — share of searches ending in a sale
Growth
Bad-5.0%90-day search growth — must beat 0% to launch
Price range
Bad$48.70–$1336.08cheapest to priciest tracked listing — scored on the share inside $15–$100