---
title: "S21 Ultra Case — £82K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/electronics-photo/s21-ultra-case"
last_updated: "2026-07-31T12:42:48.983Z"
locale: en
meta:
description: "Niche score 48/100 · £82K/yr market · 243K searches/yr · £8.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 48/100 · £82K/yr market · 243K searches/yr · £8.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "S21 Ultra Case — £82K/yr Amazon UK Niche (2026) - Flapen"
---
# **s21 ultra case**
**Skip it**
Soft demand (-17.2% this quarter) — this niche doesn't clear our bar today.
Market size 20Growth 16Conversion 47Competition 79Returns 52Price range 16Avg price 25Brand share 95Review moat 36Quality gap 70
**Brand share**
**Incredible****37%**
top-5 brand share — no brand owns this niche
**Competition**
**Great****36%**
top-5 click share — an open shelf
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Returns**
**Good****2.9%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****3.8%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****2,850.62**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Okay****£8.96**
avg listing price — sweet spot $15–$100
**Market size**
**Bad****£82K**
£82K/yr · 243K searches
**Growth**
**Bad****-17.2%**
90-day search growth — must beat 0% to launch
**Price range**
**Bad****£3.09–£17.23**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United Kingdom niche tracking, s21 ultra case is a £82K/yr Amazon United Kingdom market (243K searches/yr). The top 5 brands hold 37% of demand. Demand peaks in Sep. Verdict: Skip it — 48/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **s21 ultra case market data**
- **Units sold / yr**
- **6K–8K**
- avg 100–250/product
- **Revenue / yr**
- **£54K–£72K**
- units × avg price
- **Conversion rate**
- **3.8%**
- **Avg BSR**
- **#3,057**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **82%**
- **Out of stock**
- **6.3%**
- **Avg brand age**
- **38 months**
- **Avg seller age**
- **196 days**
## **Competition & brand share**
Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.
**Brands**
**38 **▼falling
**Sellers**
**47**
**Top-5 brand share**
**37%**
Top 20: 86%
**Top-5 click share**
**36%**
Top 20: 80%
**Open market**
**57%**
- imluckies9% - HikerClub8% - Dexnor7% - GiiYoon7% - Spigen6% - KaiMai6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -17.2% search growth over the last 90 days.
12K8KSpike '24 seasonSepDecMarJunAugNovMarMay
Peak months: Sep · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/uk/electronics-photo/s21-ultra-case/trend)
## **Top s21 ultra case search terms**
- **samsung s21 ultra case**85K/yr-18.4%2.3% conv. - **s21 ultra phone case**79K/yr-19.5%3.0% conv. - **samsung galaxy s21 ultra case**26K/yr-12.4%2.2% conv. - **s21 ultra case**20K/yr-15.8%2.8% conv. - **galaxy s21 ultra case**12K/yr-21.9%2.9% conv. - **samsung galaxy s21 ultra 5g case**10K/yr+1.0%1.6% conv. - **samsung s21 ultra phone case**10K/yr-12.1%2.4% conv. [**All search terms **](https://flapen.com/research/uk/electronics-photo/s21-ultra-case/search-terms)
## **Top s21 ultra 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%£2K6%£5K9%£7K12%£10K1101001K10K100K 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**imluckies Shockproof Case for Samsung Galaxy S21 Ultra with Sliding Camera Cover Slim Fit& Scratch-Resistant Camera Lens Protection Case for Samsung Galaxy S21 Ultra 5G 6.8- Black**imluckies**£9.12**4.4★7,212 rev](https://www.amazon.co.uk/dp/B08XNBRBG4) [2**HikerClub Galaxy S21 Ultra 5G Case Compatible with Mag Safe Wireless Charger Translucent Frosted Matte Back Soft Silicone Frame Military Grade Shockproof Case Cover for Galaxy S21Ultra Matte Black**HikerClub**£11.10**4.6★851 rev](https://www.amazon.co.uk/dp/B09ZPGVS7L) [3**Dexnor Case for Samsung Galaxy S21 Ultra 5G 6.8 Inch with Built-in Screen Protector Military Grade Armour Heavy Duty 360 Full Body Shockproof Bumper Protection Cover with Stand - Black**Dexnor**£15.94**4.1★4,705 rev](https://www.amazon.co.uk/dp/B08W8BNLTB) [4**Spigen Rugged Armor Case for Samsung Galaxy S21 Ultra - Matte Black**Spigen**£13.37**4.6★5,243 rev](https://www.amazon.co.uk/dp/B08LK73YT6) [5![KaiMai for Samsung S21 Ultra Case [10 FT Military Grade Drop Protection] [Non-Slip] [2 pcs TPE HD Screen Protector] Heavy Duty Full-Body Shockproof Case for Samsung Galaxy S21 Ultra 5G 6.8-Black](https://m.media-amazon.com/images/I/51Nko2ABu6L.jpg)**KaiMai for Samsung S21 Ultra Case \[10 FT Military Grade Drop Protection\] \[Non-Slip\] \[2 pcs TPE HD Screen Protector\] Heavy Duty Full-Body Shockproof Case for Samsung Galaxy S21 Ultra 5G 6.8-Black**KaiMai**£6.28**4.4★94 rev](https://www.amazon.co.uk/dp/B0DBSQFDFP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SUANDUCK for Samsung Galaxy S21 Ultra mobile phone case leather flip case with RFID-blocking card compartment adjustable stand and 360 drop protection with Samsung S21 Ultra Light Blue**SUANDUCK**£17.23**9 rev8mo ago](https://www.amazon.co.uk/dp/B0G1RWFPMM) [**Pilaru Sliding Card Holder Case for Samsung S21 Ultra | Hidden Slot Cards | 2 screen protectors | Shockproof & Anti-Slip Protective Wallet Cover | Durable Dual-Layer Design for Galaxy S21 Ultra Black**Pilaru**£7.67**513 rev9mo ago](https://www.amazon.co.uk/dp/B0FWK64F4L) [![for Samsung S21 Ultra Phone Case with Screen Protector:[Military Grade Drop Tested] Ring Holder Kickstand Shockproof Anti-Slip Protective Phone Case for Samsung Galaxy S21 Ultra 6.8- Blue](https://m.media-amazon.com/images/I/51mzHLUpeHL.jpg)**for Samsung S21 Ultra Phone Case with Screen Protector:\[Military Grade Drop Tested\] Ring Holder Kickstand Shockproof Anti-Slip Protective Phone Case for Samsung Galaxy S21 Ultra 6.8- Blue**Jihucase**£7.44**27 rev10mo ago](https://www.amazon.co.uk/dp/B0FQBT7L5G) [![AWZHYDT for Samsung S21 Ultra 5G Case with 1 HD Screen Protector & Slide Camera Cover [Military-Grade] Phone Case Heavy Duty Rugged Shockproof Protective Cover for Samsung Galaxy S21 Ultra(Cyan/Pink)](https://m.media-amazon.com/images/I/41ityu8B1nL.jpg)**AWZHYDT for Samsung S21 Ultra 5G Case with 1 HD Screen Protector & Slide Camera Cover \[Military-Grade\] Phone Case Heavy Duty Rugged Shockproof Protective Cover for Samsung Galaxy S21 Ultra(Cyan/Pink)**AWZHYDT**£8.29**23 rev1y ago](https://www.amazon.co.uk/dp/B0F98W8N44) [**Jshru for Samsung S21 Ultra Case with Screen Protector-Camera Protective Cover Ring Stand Phone Case for Men and Women Shockproof Bumper Phone Cover for Samsung Galaxy S21 Ultra Black**Jshru**£7.85**1,158 rev1y ago](https://www.amazon.co.uk/dp/B0F1CCLVXX)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**SUANDUCK for Samsung Galaxy S21 Ultra mobile phone case leather flip case with RFID-blocking card compartment adjustable stand and 360 drop protection with Samsung S21 Ultra Light Blue**SUANDUCK**£17.23**4.1★**▲ 225%**](https://www.amazon.co.uk/dp/B0G1RWFPMM) [**Kuafcase for Samsung S21 Ultra Case Wallet Leather Flip Case with 4 Card Slots Magnetic Closure Kickstand Shockproof Protective Phone Case for Samsung Galaxy S21 Ultra - Black**Kuafcase**£7.83**4.4★**▲ 147%**](https://www.amazon.co.uk/dp/B0BLNDGXLP) [**HikerClub Galaxy S21 Ultra 5G Case Compatible with Mag Safe Wireless Charger Translucent Frosted Matte Back Soft Silicone Frame Military Grade Shockproof Case Cover for Galaxy S21Ultra Matte Black**HikerClub**£11.10**4.6★**▲ 50%**](https://www.amazon.co.uk/dp/B09ZPGVS7L) [**AYMECL for S21 Ultra Case with Slide Camera Cover 1Pcs Self-Healing Screen Protector Heavy Duty Shockproof Protective Case with Rotated Ring Kickstand for Samsung Galaxy S21 Ultra 5G Black**AYMECL**£5.07**4.4★**▲ 47%**](https://www.amazon.co.uk/dp/B0D7MMKHVY) [**GiiYoon Case Compatible with Samsung Galaxy S21 Ultra 5G Silky-Soft Touch Full-Body Protective Phone Silicone Case Shockproof Cover with Microfiber Lining Black**GiiYoon**£7.62**4.2★**▲ 42%**](https://www.amazon.co.uk/dp/B0B18CPPZK)
**~~View all trending →~~**
## **What buyers say about s21 ultra case**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**23%
*“Good quality case”*
**Size-Overall**22%
*“Fits perfectly”*
**Drop/Impact Protection**10%
*“Nice protective case”*
**Strength**9%
*“Still going strong after 15 months”*
**Value For Money**6%
*“but still great value at current price”*
**Ease Of Use**5%
*“also practical”*
**Color**4%
*“Love the colour”*
**Advertised Vs Actual Product**3%
*“basically does what the description says it does”*
**Grip**2%
*“Good product I like the grip on the back too”*
**Touch/Button Controls**1%
*“Buttons react well”*
### **What buyers complain about **
**Size-Overall**11%
*“It Does Not Fit The Phone”*
**Durability**9%
*“Failed on the second use in water”*
**Quality-Overall**9%
*“Terrible clip quality”*
**Ease Of Use**6%
*“it's also tough to close and open in general, I decided to just remove that piece completely for comfort and ease”*
**Functionality-Overall**5%
*“Doesn't stand up to the test”*
**Touch/Button Controls**5%
*“Ive previously had issues with the touch screen”*
**Mechanism Issues**5%
*“the kickstand at the back is loose already”*
**Compatibility-Overall**4%
*“It Does Not Fit The Phone”*
**Charging**3%
*“I minused 2 stars because the stand is so bulky its impossible to charge your phone wirelessly”*
**Assembly/Installation**3%
*“it's also near impossible to install without bubbles”*
### **Top return reasons **
**Size-Overall**44%
**Compatibility-Overall**10%
**Quality-Overall**8%
**Magnetic Strength/Adsorption**5%
**Functionality-Overall**5%
**Advertised Vs Actual Product**5%
**Charging**4%
**Touch/Button Controls**3%
**Material Quality**2%
**Strength**2%
## **Common questions**
- **Is s21 ultra case profitable to sell on Amazon United Kingdom?**
- The niche generates £82K/yr across 45 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -17.2%. Flapen's verdict: Skip it (48/100).
- **How competitive is the s21 ultra case niche?**
- 38 brands and 47 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 37% of demand.
- **What do buyers complain about in s21 ultra case?**
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 2.9%.
- **When does demand for s21 ultra case peak?**
- Demand peaks in Sep; the busiest month runs 1.8× the quietest.
- **What does it cost to enter the s21 ultra case niche?**
- Listings span £3.09–£17.23; the average listing price is £8.96 (sweet spot $15–$100). The average incumbent carries 2,851 reviews — the moat a new listing must climb.
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