Index · Every Data Study

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Every Amazon category we've broken down by real sales, ratings and review data — 11 studies and counting. Pick a product and jump straight in.

Beauty · 1 study

Hair Dryer Brushes

200,000+ sold a month — which one-step blow-dryer brush actually gives a salon blowout? $30 to salon, the 3 worth buying.

Electronics · 3 studies

Wireless Earbuds

Do you really need AirPods? 342,000+ pairs sell every month — the 3 worth buying, $20 to AirPods.

Apple Watch, Garmin, or an $80 Fitbit? What 123,600 monthly buyers actually choose.

Streaming Sticks

Fire TV or Roku? 65,000+ devices sell a month — and is the $199 NVIDIA Shield worth it?

Kitchen & Home · 3 studies

Insulated Tumblers Free report

Stanley vs YETI vs Owala — the tumbler war settled by the numbers. Full report free (PDF + Excel).

Which air fryer actually sells — Cosori, Ninja or Chefman — and which size people regret.

Electric Kettles

Gooseneck, glass or stainless — what buyers really choose, and the few genuinely worth it.

Fitness · 4 studies

Resistance Bands

211,000+ sold every month in a sea of near-identical $10 listings — which ones people actually buy.

Adjustable Dumbbells

What the sales data really shows — BowFlex and the budget sets that quietly outsell it.

Every massage gun on Amazon's first 3 pages, tracked — the 3 worth the money.

One $22 mat quietly outsells the $120 names — and the reviews explain exactly why.

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