Is samsung s21 plus case profitable to sell on Amazon United Kingdom?

The niche generates £28K/yr across 42 tracked products. 0 of 7 products launched in the last 360 days are still selling. 90-day search growth is -15.6%. Flapen's verdict: Skip it (44/100).

How competitive is the samsung s21 plus case niche?

33 brands and 54 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 46% of demand.

What do buyers complain about in samsung s21 plus case?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Magnetic Strength/Adsorption. The return rate is 3.3%.

When does demand for samsung s21 plus case peak?

Demand is steady year-round — the busiest month runs 1.7× the quietest.

What does it cost to enter the samsung s21 plus case niche?

Listings span £2.14–£27.34; the average listing price is £8.16 (sweet spot $15–$100). The average incumbent carries 2,283 reviews — the moat a new listing must climb.

samsung s21 plus case

Skip it

A small market ($28K/yr) — this niche doesn't clear our bar today.

Brand share

Great46%

top-5 brand share — no brand owns this niche

Competition

Good44%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Price range

Okay£2.14–£27.34

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

Returns

Okay3.3%

return rate — above 5% kills the launch gate

Conversion

Okay3.5%

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

Review moat

Okay2,282.76

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad£8.16

avg listing price — sweet spot $15–$100

Growth

Bad-15.6%

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

Market size

Bad£28K

£28K/yr · 100K searches

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United Kingdom niche tracking, samsung s21 plus case is a £28K/yr Amazon United Kingdom market (100K searches/yr). The top 5 brands hold 46% of demand. Verdict: Skip it — 44/100.

Data updated Jul 25, 2026 · scored weekly · How we score niches

samsung s21 plus case market data

Units sold / yr: 3K–4K; avg 0–100/product
Revenue / yr: £24K–£33K; units × avg price
Conversion rate: 3.5%
Avg BSR: #3,776
Page quality: 0%
Prime: 98%
Sponsored: 81%
Out of stock: 10.4%
Avg brand age: 35 months
Avg seller age: 203 days

Competition & brand share

The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.

Brands

33 falling

Sellers

Top-5 brand share

46%

Top 20: 90%

Top-5 click share

44%

Top 20: 81%

Open market

48%

Jihucase12%
LOLFZ10%
kwmobile8%
KIOMY8%
Pilaru7%
Cyber-Tech6%

Demand & seasonality

Weekly Amazon search volume, last 103 weeks — -15.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.7×

Open Trend

Top samsung s21 plus case search terms

samsung s21 plus case22K/yr -1.1%2.2% conv.
s21 plus phone case19K/yr -14.8%2.7% conv.
s21+ phone case13K/yr -16.3%3.5% conv.
samsung s21+ case11K/yr -21.9%3.2% conv.
samsung galaxy s21 plus case10K/yr -9.3%2.2% conv.
samsung s21 plus phone case9K/yr -32.6%2.1% conv.
s21 plus case5K/yr -15.5%1.6% conv.
samsung galaxy s21+ case3K/yr -18.0%1.8% conv.
galaxy s21 plus case2K/yr -12.0%1.8% conv.
samsung s21 + case2K/yr -21.0%2.0% conv.

All search terms

Top samsung s21 plus case 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

for Samsung Galaxy S21 Plus Case with Screen Protector: Heavy Duty Protective Anti-scratch and ShockProof Double-Layer Protection Cover for Samsung S21 Plus (Black)

Jihucase£7.664.3★55 rev

LOLFZ Wallet Case for Samsung Galaxy S21 Plus 5G Vintage Leather Book Case with Card Holder Kickstand Magnetic Closure Flip Case Cover for Galaxy S21 Plus 5G - Black

LOLFZ£7.604.4★1,387 rev

kwmobile Case for Samsung Galaxy S21 Plus Case - Soft Cover - Shockproof Silicone - Wireless Charging Bordeaux Violet

kwmobile£6.524.4★22,927 rev

KIOMY Clear Case for Samsung Galaxy S21+ / S21 Plus 5G Airbag Corners Shockproof Bumper Protective Phone Cover Hybrid Design Hard PC Back with Flexible TPU Frame

KIOMY£3.794.4★1,409 rev

Cyber-Tech Black Case Compatible with Samsung Galaxy S21 5G Plus Slim Liquid Silicone Shockproof Phone Case with Soft Microfiber Lining

Cyber-Tech£3.494.2★35 rev

Newest

by launch date

for Samsung S21 Plus Case with Screen Protector: [Military Grade 20ft. Drop Tested] Slide Camera Cover Ring Shockproof Protective Phone Case for - Samsung Galaxy S21 Plus (Black)

Yiakeng£7.56800 rev

6mo ago

Pilaru Sliding Card Holder Case for Samsung S21 Plus | Hidden Slot Cards | 2 screen protectors | Shockproof & Anti-Slip Protective Wallet Cover | Durable Dual-Layer Design for Galaxy S21 Plus Black

Pilaru£7.55513 rev

9mo ago

for Samsung Galaxy S21 Plus Case with Screen Protector: Heavy Duty Protective Anti-scratch and ShockProof Double-Layer Protection Cover for Samsung S21 Plus (Black)

Jihucase£7.6655 rev

10mo ago

Azororo Case for Samsung Galaxy S21 Plus 5G Premium Leather Phone Cover Magnetic Stand Flip Case with Wallet Card Slot Cover for Samsung Galaxy S21 Plus -Black

Azororo£10.455,067 rev

1y ago

FNDMIL [NO.1 Magnetic for Samsung Galaxy S21 Plus Case with MagSafe[Military Grade Drop Tested][Translucent Matte][Anti-Fingerprint] Slim Case Soft Silicone Bumper for Samsung Galaxy S21+ Case Black

FNDMIL£14.101,425 rev

1y ago

What buyers say about samsung s21 plus case

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

What buyers love

Size-Overall28%

“Fits well”

Quality-Overall22%

“Quality case”

Value For Money8%

“value for money”

Strength8%

“Perfect clear strong case”

Advertised Vs Actual Product6%

“Accurate product description”

Color6%

“Brilliant quality and lovely colour”

Drop/Impact Protection5%

“The best protection”

Magnetic Strength/Adsorption2%

“Magnetic clasp, very durable, good quality”

Durability2%

“very durable”

Ease Of Use2%

“Useful”

What buyers complain about

Size-Overall25%

“Too small”

Quality-Overall13%

“this is pretty cheap”

Magnetic Strength/Adsorption11%

“the magnet strength is very bad wouldn't recommend”

Advertised Vs Actual Product8%

“false advertising”

Strength8%

“This case is very fragile”

Compatibility-Overall8%

“This product is a con it doesn't fit my samsung Galaxy s21 + 5g which it says it does”

Charging7%

“some charging cables won't fit cos the opening is not wide enough”

Battery Life5%

“Poor battery life”

Color3%

“Colour Fades”

Display Colors3%

“Looks bad as colour comes off easy as shown”

Top return reasons

Size-Overall69%

Compatibility-Overall9%

Advertised Vs Actual Product3%

Magnetic Strength/Adsorption3%

Charging3%

Touch/Button Controls2%

Functionality-Overall2%

Quality-Overall2%

Color1%

Material Quality1%

Common questions

Is samsung s21 plus case profitable to sell on Amazon United Kingdom?: The niche generates £28K/yr across 42 tracked products. 0 of 7 products launched in the last 360 days are still selling. 90-day search growth is -15.6%. Flapen's verdict: Skip it (44/100).
How competitive is the samsung s21 plus case niche?: 33 brands and 54 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 46% of demand.
What do buyers complain about in samsung s21 plus case?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Magnetic Strength/Adsorption. The return rate is 3.3%.
When does demand for samsung s21 plus case peak?: Demand is steady year-round — the busiest month runs 1.7× the quietest.
What does it cost to enter the samsung s21 plus case niche?: Listings span £2.14–£27.34; the average listing price is £8.16 (sweet spot $15–$100). The average incumbent carries 2,283 reviews — the moat a new listing must climb.