---
title: "Samsung S21 Plus Case — £28K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/electronics-photo/samsung-s21-plus-case"
last_updated: "2026-07-31T17:08:01.543Z"
locale: en
meta:
description: "Niche score 44/100 · £28K/yr market · 100K searches/yr · £8.16 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · £28K/yr market · 100K searches/yr · £8.16 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Samsung S21 Plus Case — £28K/yr Amazon UK Niche (2026) - Flapen"
---
# **samsung s21 plus case**
**Skip it**
A small market ($28K/yr) — this niche doesn't clear our bar today.
Market size 7Growth 17Conversion 44Competition 69Returns 46Price range 49Avg price 23Brand share 89Review moat 42Quality gap 63
**Brand share**
**Great****46%**
top-5 brand share — no brand owns this niche
**Competition**
**Good****44%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Good****4.4★**
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**
**Okay****3.3%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****3.5%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****2,282.76**
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**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500")
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 ~~](https://flapen.com/research/methodology)
## **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**
**54**
**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.
4K3K seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/uk/electronics-photo/samsung-s21-plus-case/trend)
## **Top samsung s21 plus case search terms**
- **samsung s21 plus case**22K/yr-1.1%2.2% conv. - **s21 plus phone case**19K/yr-14.8%2.7% conv. - **s21+ phone case**13K/yr-16.3%3.5% conv. - **samsung s21+ case**11K/yr-21.9%3.2% conv. - **samsung galaxy s21 plus case**10K/yr-9.3%2.2% conv. - **samsung s21 plus phone case**9K/yr-32.6%2.1% conv. - **s21 plus case**5K/yr-15.5%1.6% conv. - **samsung galaxy s21+ case**3K/yr-18.0%1.8% conv. - **galaxy s21 plus case**2K/yr-12.0%1.8% conv. - **samsung s21 + case**2K/yr-21.0%2.0% conv. [**All search terms **](https://flapen.com/research/uk/electronics-photo/samsung-s21-plus-case/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.
0%3%£8546%£2K9%£3K12%£3K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**£7.66**4.3★55 rev](https://www.amazon.co.uk/dp/B0FR8ZZ1ZG) [2**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**£7.60**4.4★1,387 rev](https://www.amazon.co.uk/dp/B08V1RBGNX) [3**kwmobile Case for Samsung Galaxy S21 Plus Case - Soft Cover - Shockproof Silicone - Wireless Charging Bordeaux Violet**kwmobile**£6.52**4.4★22,927 rev](https://www.amazon.co.uk/dp/B097BGPVKM) [4**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**£3.79**4.4★1,409 rev](https://www.amazon.co.uk/dp/B09292V828) [5**Cyber-Tech Black Case Compatible with Samsung Galaxy S21 5G Plus Slim Liquid Silicone Shockproof Phone Case with Soft Microfiber Lining**Cyber-Tech**£3.49**4.2★35 rev](https://www.amazon.co.uk/dp/B0CSB48ZNN)
**~~View all top sellers →~~**
### **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)](https://m.media-amazon.com/images/I/51N-+gDkVYL.jpg)**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**£7.56**800 rev6mo ago](https://www.amazon.co.uk/dp/B0GHDZWNWL) [**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**£7.55**513 rev9mo ago](https://www.amazon.co.uk/dp/B0FWK7LY4K) [**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**£7.66**55 rev10mo ago](https://www.amazon.co.uk/dp/B0FR8ZZ1ZG) [**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**£10.45**5,067 rev1y ago](https://www.amazon.co.uk/dp/B0F9VTRGHW) [![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](https://m.media-amazon.com/images/I/41crcWPIMPL.jpg)**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**£14.10**1,425 rev1y ago](https://www.amazon.co.uk/dp/B0F4MCQP3C)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[![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)](https://m.media-amazon.com/images/I/51N-+gDkVYL.jpg)**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**£7.56**4.4★**▲ 333%**](https://www.amazon.co.uk/dp/B0GHDZWNWL) [**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**£10.45**4.5★**▲ 268%**](https://www.amazon.co.uk/dp/B0F9VTRGHW) [**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**£7.66**4.3★**▲ 110%**](https://www.amazon.co.uk/dp/B0FR8ZZ1ZG) [**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**£7.55**4.3★**▲ 97%**](https://www.amazon.co.uk/dp/B0FWK7LY4K) [**kwmobile Case for Samsung Galaxy S21 Plus Case - Soft Cover - Shockproof Silicone - Wireless Charging Bordeaux Violet**kwmobile**£6.52**4.4★**▲ 87%**](https://www.amazon.co.uk/dp/B097BGPVKM)
**~~View all trending →~~**
## **What buyers say about samsung s21 plus case**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**28%
*“Fits well”*
**Quality-Overall**22%
*“Quality case”*
**Value For Money**8%
*“value for money”*
**Strength**8%
*“Perfect clear strong case”*
**Advertised Vs Actual Product**6%
*“Accurate product description”*
**Color**6%
*“Brilliant quality and lovely colour”*
**Drop/Impact Protection**5%
*“The best protection”*
**Magnetic Strength/Adsorption**2%
*“Magnetic clasp, very durable, good quality”*
**Durability**2%
*“very durable”*
**Ease Of Use**2%
*“Useful”*
### **What buyers complain about **
**Size-Overall**25%
*“Too small”*
**Quality-Overall**13%
*“this is pretty cheap”*
**Magnetic Strength/Adsorption**11%
*“the magnet strength is very bad wouldn't recommend”*
**Advertised Vs Actual Product**8%
*“false advertising”*
**Strength**8%
*“This case is very fragile”*
**Compatibility-Overall**8%
*“This product is a con it doesn't fit my samsung Galaxy s21 + 5g which it says it does”*
**Charging**7%
*“some charging cables won't fit cos the opening is not wide enough”*
**Battery Life**5%
*“Poor battery life”*
**Color**3%
*“Colour Fades”*
**Display Colors**3%
*“Looks bad as colour comes off easy as shown”*
### **Top return reasons **
**Size-Overall**69%
**Compatibility-Overall**9%
**Advertised Vs Actual Product**3%
**Magnetic Strength/Adsorption**3%
**Charging**3%
**Touch/Button Controls**2%
**Functionality-Overall**2%
**Quality-Overall**2%
**Color**1%
**Material Quality**1%
## **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.
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