Is fungal nail pen profitable to sell on Amazon United States?

The niche generates $4.4M/yr across 4 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +4.7%. Flapen's verdict: Launch it (56/100).

How competitive is the fungal nail pen niche?

3 brands and 4 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in fungal nail pen?

Top complaints mined from reviews: Functionality-Overall, Value For Money, Symptom Reduction. The return rate is 0.3%.

What does it cost to enter the fungal nail pen niche?

Listings span $19.86–$56.57; the average listing price is $33.54 (sweet spot $15–$100). The average incumbent carries 1,844 reviews — the moat a new listing must climb.

fungal nail pen

Launch it

A $4.4M/yr market growing +4.7% this quarter with returns at 0.3% — clears our launch bar.

Returns

Incredible0.3%

return rate — above 5% kills the launch gate

Market size

Incredible$4.4M

$4.4M/yr · 1.7M searches

Avg price

Incredible$33.54

avg listing price — sweet spot $15–$100

Price range

Incredible$19.86–$56.57

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

Conversion

Great7.7%

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

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Review moat

Okay1,843.75

avg incumbent reviews — the moat a new listing must climb

Growth

Okay+4.7%

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

Competition

Bad100%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, fungal nail pen is a $4.4M/yr Amazon United States market (1.7M searches/yr). The top 5 brands hold 100% of demand. Verdict: Launch it — 56/100.

Data updated Jul 18, 2026 · scored weekly · How we score niches

fungal nail pen market data

Units sold / yr: 125K–150K; avg 30,000–40,000/product
Revenue / yr: $4.2M–$5.0M; units × avg price
Conversion rate: 7.7%
Avg BSR: #11
Page quality: 0%
Prime: 100%
Sponsored: 50%
Out of stock: 0.0%
Avg brand age: 41 months
Avg seller age: 143 days

Competition & brand share

The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 rising

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

100%

Top 20: 100%

Open market

lunavia87%
Lakeim9%
OMZOK4%
Open — no brand owns it (0%)

Demand

Weekly Amazon search volume, last 31 weeks — +4.7% search growth over the last 90 days.

Open Trend

Top fungal nail pen search terms

lunavia toenail fungus pen905K/yr -5.0%6.5% conv.
lunavia315K/yr +38.3%5.0% conv.
lunavia nail fungus pen105K/yr +72.4%4.8% conv.
nail fungus pen46K/yr +27.5%1.9% conv.
lunovia toenail fungus pen32K/yr +30.8%5.7% conv.
antifungal pen37K/yr -26.7%2.2% conv.
lunavia antifungal pen29K/yr +31.9%4.3% conv.
lunivia toenail fungus pen33K/yr -22.1%5.7% conv.
toe fungus pen21K/yr +2.4%4.0% conv.
toenail fungus pen25K/yr -7.1%2.2% conv.

All search terms

Top fungal nail 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 4 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Lunavia Antifungal Pen Cures Most Athletes Foot Jock Itch and Ringworm - 25% Undecylenic Acid with added Tea Tree Jojoba Clove Bud Oils & Aloe - 3-Pack Twist Pen (9ML Volume)

lunavia$36.944.1★5,596 rev

Lunavia Antifungal Pen Cures Most Athletes Foot Jock Itch and Ringworm - 25% Undecylenic Acid with added Tea Tree Jojoba Clove Bud Oils & Aloe - 6-Pack Twist Pen (18ML Volume)

lunavia$56.574.2★1,100 rev

Toenail Fungus Treatment Extra Strength: 25% Undecylenic Acid & Tea Tree Oil - Repairs Yellow Thick Brittle Toe and Fingernails - 3 Pens with 5 Nail Files

Lakeim$20.784.5★340 rev

Toenail Fungus Pen - 25% Undecylenic Acid Tea Tree Oil - Toenail Fungus Treatment Extra Strength for Toe Nail Repair Pen for Damaged Nails Foot Fungal Nail Treatment for Fungi Funginail - 5pcs

OMZOK$19.864.2★339 rev

Newest

by launch date

Toenail Fungus Treatment Extra Strength: 25% Undecylenic Acid & Tea Tree Oil - Repairs Yellow Thick Brittle Toe and Fingernails - 3 Pens with 5 Nail Files

Lakeim$20.78340 rev

8mo ago

Toenail Fungus Pen - 25% Undecylenic Acid Tea Tree Oil - Toenail Fungus Treatment Extra Strength for Toe Nail Repair Pen for Damaged Nails Foot Fungal Nail Treatment for Fungi Funginail - 5pcs

OMZOK$19.86339 rev

11mo ago

Lunavia Antifungal Pen Cures Most Athletes Foot Jock Itch and Ringworm - 25% Undecylenic Acid with added Tea Tree Jojoba Clove Bud Oils & Aloe - 3-Pack Twist Pen (9ML Volume)

lunavia$36.945,596 rev

1y ago

Lunavia Antifungal Pen Cures Most Athletes Foot Jock Itch and Ringworm - 25% Undecylenic Acid with added Tea Tree Jojoba Clove Bud Oils & Aloe - 6-Pack Twist Pen (18ML Volume)

lunavia$56.571,100 rev

1y ago

What buyers say about fungal nail pen

What buyers praise and complain about, mined from review topics.

What buyers love

Efficiency19%

“It works great excellently”

Quality-Overall17%

“Great product and easy to use”

Ease Of Use15%

“Ease of use”

Value For Money8%

“Worth buying”

Advertised Vs Actual Product6%

“Does what it says”

Symptom Reduction6%

“The results were truly noticeable”

Ease Of Application5%

“Great applicator”

Instructions/User Manual/Troubleshooting2%

“Easy to use product with clear instructions”

Smell2%

“has a mild pleasant scent actually”

Functionality-Overall2%

“Works fast just as advertised”

What buyers complain about

Functionality-Overall46%

“Works slowly”

Value For Money10%

“very expensive”

Symptom Reduction8%

“After 9 months, 3 different orders, I have no improvement”

Quality-Overall3%

“Quality control is terrible”

Advertised Vs Actual Product3%

“Didnt work as described”

Durability2%

“1 pin won't last a month for me”

Allergies2%

“allergic”

Ease Of Use2%

“Difficult to use”

Color2%

“yellow is starting to turn back normal”

Ethical Trade/Fair Trade2%

“it's a scam period”

Top return reasons

Functionality-Overall29%

Advertised Vs Actual Product16%

Leak-Proof16%

Dispensing Mechanism13%

Defective Material/Parts8%

Ease Of Application5%

Moist/Dry3%

Oily/Greasy2%

Quality-Overall1%

Ingredients-Overall1%

Common questions

Is fungal nail pen profitable to sell on Amazon United States?: The niche generates $4.4M/yr across 4 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +4.7%. Flapen's verdict: Launch it (56/100).
How competitive is the fungal nail pen niche?: 3 brands and 4 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in fungal nail pen?: Top complaints mined from reviews: Functionality-Overall, Value For Money, Symptom Reduction. The return rate is 0.3%.
What does it cost to enter the fungal nail pen niche?: Listings span $19.86–$56.57; the average listing price is $33.54 (sweet spot $15–$100). The average incumbent carries 1,844 reviews — the moat a new listing must climb.