---
title: "Reviews — 21 inch lawnmower - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/21-inch-lawnmower/reviews"
last_updated: "2026-08-09T04:45:06.984Z"
locale: en
meta:
  description: "Niche score 58/100 · $136K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 58/100 · $136K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — 21 inch lawnmower - Flapen"
---

# **21 inch lawnmower**

**Worth a look**

Shows demand growing +136.8% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 30Growth 96Conversion 9Competition 80Returns 65Price range 0Avg price 27Brand share 60Review moat 63Quality gap 93

**Growth**

**Incredible****+136.8%**

90-day search growth — must beat 0% to launch

**Quality gap**

**Great****4.0★**

avg incumbent rating — lower means beatable quality

**Competition**

**Great****35%**

top-5 click share — an open shelf

**Returns**

**Good****2.4%**

return rate — above 5% kills the launch gate

**Review moat**

**Good****965.32**

avg incumbent reviews — the moat a new listing must climb

**Brand share**

**Good****69%**

top-5 brand share — brands hold most of the demand

**Market size**

**Okay****$136K**

$136K/yr · 58K searches

**Avg price**

**Okay****$327.61**

avg listing price — sweet spot $15–$100

**Conversion**

**Bad****0.7%**

search→purchase rate — share of searches ending in a sale

**Price range**

**Bad****$128.43–$812.55**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")

## Reviews