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spirularin

Skip it

Brand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.

Market size 19Growth 36Conversion 94Competition 19Returns 99Price range 66Avg price 78Brand share 6Review moat 71Quality gap 42

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Great11.7%

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

Avg price

Great€16.11

avg listing price — sweet spot $15–$100

Review moat

Good657.23

avg incumbent reviews — the moat a new listing must climb

Price range

Good€4.27–€36.10

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+8.6%

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

Market size

Bad€75K

€75K/yr · 40K searches

Competition

Bad77%

top-5 click share — a locked-up shelf

Brand share

Bad98%

top-5 brand share — brand-locked demand

According to Flapen's Amazon Germany niche tracking, spirularin is a €75K/yr Amazon Germany market (40K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in May. Verdict: Skip it — 46/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

spirularin market data

Units sold / yr
4K–5K
avg 250–500/product
Revenue / yr
€64K–€81K
units × avg price
Conversion rate
11.7%
Avg BSR
#70
Page quality
0%
Prime
100%
Sponsored
85%
Out of stock
6.7%
Avg brand age
53 months
Avg seller age
182 days

Competition & brand share

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 flat

Sellers

26

Top-5 brand share

98%

Top 20: 100%

Top-5 click share

77%

Top 20: 100%

Open market

0%

  • Spirularin79%
  • bedrop9%
  • Onsen Secret4%
  • Sante Naturkosmetik3%
  • ARKADA2%
  • OPI2%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +8.6% search growth over the last 90 days.
900700Prime Day '24Spike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: May · busiest ÷ quietest = 1.8×

Top spirularin search terms

  • spirularin13K/yr
  • nagelserum13K/yr
  • spirularin nagelserum10K/yr
  • arkadas serum tc16 nagel3K/yr
All search terms

Top spirularin 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.

0%15%€11K30%€23K45%€34K60%€45K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

What buyers say about spirularin

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

What buyers love

Qualität insgesamt21%

“Super Produkt”

Geruch14%

“Super Duft”

beworben Vs Tatsächliches Produkt8%

“Scheint zu wirken”

Symptomreduktion6%

“Man sieht und spürt eine deutliche Besserung”

Feucht/Trocken6%

“Pflegt trockene Füße spürbar”

Preis-Leistungs-Verhältnis5%

“Das Geld ist gut investiert, zumal man wahrscheinlich erstmal lange damit auskommt”

Einfache Anwendung4%

“Aber ist mit Pinsel leicht aufzutragen”

Weiches Gefühl4%

“macht auch eine sehr weiche Nagelhaut”

Komfort insgesamt3%

“Angenehm in der Handhabung”

Saugfähigkeit3%

“Das Gel zieht ganz gut ein”

What buyers complain about

Preis-Leistungs-Verhältnis9%

“völlig überteuert im Verhältnis zur Leistung”

Funktionalität insgesamt8%

“Wieder mal reingefallen”

Symptomreduktion8%

“es hat sich keinerlei Besserung ergeben, ja das Gegenteil ist der Fall die nagelhaut ist noch weiter eingerissen.”

Geruch7%

“es riecht unangenehm”

Feucht/Trocken7%

“Das Gel ist sehr flüssig/wässrig”

Einfache Anwendung4%

“gutes Produkt, schlecht anzuwenden”

beworben Vs Tatsächliches Produkt3%

“Liefert nicht, was OPI verspricht”

Hartes Gefühl2%

“scheinen die Nägel härter zu werden”

Qualität insgesamt2%

“Günstiges Produkt”

Benutzerfreundlichkeit2%

“Ist sehr schwer zu öffnen”

Top return reasons

Funktionalität insgesamt36%
Geruch11%
beworben Vs Tatsächliches Produkt8%
Auslaufsicher7%
Qualität insgesamt5%
Defekt Material/Teile4%
Gesamtgröße3%
Benutzerfreundlichkeit3%
Preis-Leistungs-Verhältnis2%
Symptomreduktion2%

Common questions

Is spirularin profitable to sell on Amazon Germany?
The niche generates €75K/yr across 13 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +8.6%. Flapen's verdict: Skip it (46/100).
How competitive is the spirularin niche?
6 brands and 26 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 98% of demand.
What do buyers complain about in spirularin?
Top complaints mined from reviews: Preis-Leistungs-Verhältnis, Funktionalität insgesamt, Symptomreduktion. The return rate is 0.1%.
When does demand for spirularin peak?
Demand peaks in May; the busiest month runs 1.8× the quietest.
What does it cost to enter the spirularin niche?
Listings span €4.27–€36.10; the average listing price is €16.11 (sweet spot $15–$100). The average incumbent carries 657 reviews — the moat a new listing must climb.