---
title: "Trend — 3ml cartridge for insulin pen - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/3ml-cartridge-for-insulin-pen/trend"
last_updated: "2026-08-09T06:26:19.104Z"
locale: en
meta:
  description: "Niche score 67/100 · $75K/yr market · 37K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 67/100 · $75K/yr market · 37K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Trend — 3ml cartridge for insulin pen - Flapen"
---

# **3ml cartridge for insulin pen**

**Worth a look**

Shows a thin review moat (50 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 19Growth 80Conversion 85Competition 64Returns 98Price range 81Avg price 90Brand share 69Review moat 98Quality gap 40

**Review moat**

**Incredible****49.56**

avg incumbent reviews — the moat a new listing must climb

**Returns**

**Incredible****0.4%**

return rate — above 5% kills the launch gate

**Avg price**

**Great****$20.82**

avg listing price — sweet spot $15–$100

**Conversion**

**Great****9.6%**

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

**Price range**

**Great****$7.71–$50.27**

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

**Growth**

**Great****+71.9%**

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

**Brand share**

**Good****64%**

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

**Competition**

**Good****47%**

top-5 click share — leaders hold, buyers still browse

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Market size**

**Bad****$75K**

$75K/yr · 37K searches

**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")

## Trend