auto injector pen
Worth a lookShows a thin review moat (99 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Review moat
Incredible99.46avg incumbent reviews — the moat a new listing must climb
Avg price
Incredible$44.49avg listing price — sweet spot $15–$100
Price range
Incredible$19.91–$99.64cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Great4.0★avg incumbent rating — lower means beatable quality
Growth
Great+67.3%90-day search growth — must beat 0% to launch
Brand share
Good68%top-5 brand share — brands hold most of the demand
Returns
Good2.9%return rate — above 5% kills the launch gate
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Conversion
Bad2.0%search→purchase rate — share of searches ending in a sale
Market size
Bad$55K$55K/yr · 62K searches
According to Flapen's Amazon United States niche tracking, auto injector pen is a $55K/yr Amazon United States market (62K searches/yr). The top 5 brands hold 68% of demand. Verdict: Worth a look — 59/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
auto injector pen market data
- Units sold / yr
- 1K–1K
- avg 0–100/product
- Revenue / yr
- $44K–$56K
- units × avg price
- Conversion rate
- 2.0%
- Avg BSR
- #127
- Page quality
- 0%
- Prime
- 85%
- Sponsored
- 73%
- Out of stock
- 15.0%
- Avg brand age
- 41 months
- Avg seller age
- 109 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
14 falling
Sellers
87
Top-5 brand share
68%
Top 20: 91%
Top-5 click share
54%
Top 20: 93%
Open market
23%
- Owen Mumford34%
- Generic10%
- VILKTDD10%
- --9%
- EvoLabTech8%
- Inject-Ease5%
Demand
Weekly Amazon search volume, last 10 weeks — +67.3% search growth over the last 90 days.Top auto injector pen search terms
- auto injector pen36K/yr
- needle-free insulin injection devices15K/yr
- autoinjector pen7K/yr
- hyaluron pen injector5K/yr
Top auto injector pen products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Autoject 2 Fixed Needle Device 1 Each (Pack of 1)
Owen Mumford$50.044.4★414 rev
AJ1300 Fixed Needle Injection Aid Device OWEN MUMFORD 1EA
Owen Mumford$51.004.3★623 rev
OWEN MUMFORD INC. OWNAJ1300 Autoject 2 Self-injection Aid Device Personal Healthcare / Health Care
--$47.494.1★212 rev
60 Unit Reusable Research Pen Injector with Protect Case and 2Pcs 3ml Cartridges (Blue)
VILKTDD$40.834.3★34 rev
Ambimedinc Inject-Ease Automatic Syringe Injector for Subcutaneous Injections or Needle Depths of 1/2 or Less Using a 1ml 1/2ml or 1/3ml Insulin Syringe with a Fixed-Tip Needle
Inject-Ease$37.864.0★830 rev
Newest
by launch date
Reusable Pen Compatible with 3ml Pen Cartridge
Leigeobei$44.065 rev
60 Unit Peptide Pen Reusable Injector Metal Pens with Travel Case Universal Compatibility for Home Work Outdoor Activities (Green)
Ferissvo$39.984 rev
80 Unit Peptide Pen Injector - Reusable Metal Injection Pen with Adjustable Dose Dial Universal Compatibility Include Travel Case for Home Travel Business (Silver)
VILKTDD$39.8715 rev
V2 Injection Pen Pen Injector Reusable Injection Pen Compatible with 3ml Pen Cartridges Pen Injector with Precise 1-80 Unit Adjustable Dose Includes 5 Empty 3ml Cartridges and Protective Carry Case
FaipoTeeh$69.966 rev
GXZ Health Vector V2 Reusable Injection Pen Set 5 Pens with 5 Bonus Cartridges 60 Unit Capacity Assorted Colors (Blue Red Black Purple & Silver)
GXZ Health$99.6426 rev
Trending
90-day click momentum
80 Unit Reusable Pen Injector - V1 Peptide Pens Compatible with 3mL Cartridges Include Protect Organizer for Commute Travel Gym Outdoor Bedside (Black)
EvoLabTech$39.854.0★
60 Unit Peptide Pen Reusable V2 Injector Metal Pens with 2PCS 3ml Cartridges and Travel Case Universal Compatibility Daily Use (Black)
Ferissvo$42.084.3★
GXZ Health Vector V2 Reusable Injection Pen Set 5 Pens with 5 Bonus Cartridges 60 Unit Capacity Assorted Colors (Blue Red Black Purple & Silver)
GXZ Health$99.644.0★
Reusable Pen Compatible with 3ml Pen Cartridge
Leigeobei$44.063.0★
60 Unit V2 Reusable Pen Injector with 2PCS 3ml Cartridges and Protect Case
Cotchen$40.473.7★
What buyers say about auto injector pen
What buyers praise and complain about, mined from review topics.What buyers love
“easy to handle”
“The build quality feels excellent”
“Works VERY well”
“It is very sturdy”
“the materials feel durable enough for long term use if taken care of properly”
“Correct dosage amount”
“portability”
“worth every penny”
“Its universal compatibility works flawlessly with my cartridges, providing smooth, highly accurate dosing every single time”
“Product is as advertised”
What buyers complain about
“Junk quality”
“If you find the instructions difficult to understand”
“Broken already”
“It took several tries for me to release 10u of meds”
“So not worth the money”
“can not use”
“Did not work”
“Pen doesnt fit”
“Not as advertised”
“Accuracy concerns”
Top return reasons
Common questions
- Is auto injector pen profitable to sell on Amazon United States?
- The niche generates $55K/yr across 26 tracked products. 17 of 21 products launched in the last 360 days are still selling. 90-day search growth is +67.3%. Flapen's verdict: Worth a look (59/100).
- How competitive is the auto injector pen niche?
- 14 brands and 87 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 68% of demand.
- What do buyers complain about in auto injector pen?
- Top complaints mined from reviews: Quality-Overall, Instructions/User Manual/Troubleshooting, Durability. The return rate is 2.9%.
- What does it cost to enter the auto injector pen niche?
- Listings span $19.91–$99.64; the average listing price is $44.49 (sweet spot $15–$100). The average incumbent carries 99 reviews — the moat a new listing must climb.