casio fx-991ex
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Avg price
Incredible£36.06avg listing price — sweet spot $15–$100
Price range
Incredible£15.12–£95.68cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Great1.1%return rate — above 5% kills the launch gate
Market size
Good£581K£581K/yr · 312K searches
Conversion
Good5.2%search→purchase rate — share of searches ending in a sale
Review moat
Okay3,225.5avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-10.8%90-day search growth — must beat 0% to launch
Competition
Bad82%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, casio fx-991ex is a £581K/yr Amazon United Kingdom market (312K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 44/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
casio fx-991ex market data
- Units sold / yr
- 20K–25K
- avg 2,500–3,000/product
- Revenue / yr
- £721K–£902K
- units × avg price
- Conversion rate
- 5.2%
- Avg BSR
- #42
- Page quality
- 0%
- Prime
- 80%
- Sponsored
- 60%
- Out of stock
- 1.0%
- Avg brand age
- 35 months
- Avg seller age
- 171 days
Competition & brand share
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.Brands
3 flat
Sellers
66
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
82%
Top 20: 100%
Open market
0%
- Casio88%
- OSALO7%
- Rppiup5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -10.8% search growth over the last 90 days.Peak months: Aug, Sep · busiest ÷ quietest = 35.3×
Top casio fx-991ex search terms
- casio fx-991cw72K/yr
- casio fx-991ex47K/yr
- a level maths calculator32K/yr
- fx-991cw22K/yr
- fx-991ex17K/yr
- casio fx991ex12K/yr
- casio fx-991ex classwiz13K/yr
- casio 991ex10K/yr
- a-level calculator9K/yr
- casio fx 991ex10K/yr
Top casio fx-991ex 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.
All 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Casio fx-991CW Advanced Scientific Calculator (UK Version)
Casio£20.324.7★2,588 rev
CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION) Black
Casio£43.474.7★9,517 rev
Casio fx-991CW+ Scientific Calculator Black (UK Version) - Upgrade from Previous fx-991CW Model
Casio£24.294.7★68 rev
OSALO Scientific Calculator 552 Functions A Level Maths Black OS-991EX CW
OSALO£19.994.7★63 rev
Casio fx-991CW including a WYNGS protective case in Black - Basic Set
Casio£31.594.5★52 rev
Newest
by launch date
Casio fx-991CW+ including a protective case in Black - Basic Set
Casio£33.231 rev
FX-991EX Scientific Calculator A Level Maths Calculator with 552 Functions 10+2 Digits Written Display Portable Calculators Scientific for Students Teachers Business School Office (Black)
Rppiup£15.123 rev
Casio fx-991CW+ Scientific Calculator Black (UK Version) - Upgrade from Previous fx-991CW Model
Casio£24.2968 rev
OSALO Scientific Calculator 552 Functions A Level Maths Black OS-991EX CW
OSALO£19.9963 rev
Casio fx-991CW including a WYNGS protective case in Black - Basic Set
Casio£31.5952 rev
Trending
90-day click momentumFX-991EX Scientific Calculator A Level Maths Calculator with 552 Functions 10+2 Digits Written Display Portable Calculators Scientific for Students Teachers Business School Office (Black)
Rppiup£15.123.5★
Casio fx-991CW+ including a protective case in Black - Basic Set
Casio£33.235.0★
Casio fx-991CW+ Scientific Calculator Black (UK Version) - Upgrade from Previous fx-991CW Model
Casio£24.294.7★
Casio fx-991CW including a WYNGS protective case in Black - Basic Set
Casio£31.594.5★
Casio FX991EX Scientific Calculator 192x63
Casio£53.994.6★
What buyers say about casio fx-991ex
What buyers praise and complain about, mined from review topics.What buyers love
“Good product as describes”
“Very easy to use”
“Worth it”
“Does the job”
“sturdy too”
“especially useful in statistics”
“Button responsiveness, man this review idea thing is trying to pick anything out, yes it works good good”
“Battery life and button functioning is very good”
“The build quality is excellent, and it feels solid and durable”
“And also additional operations in the menus”
What buyers complain about
“Unfortunately, the first one broke so this is our second purchase”
“ong its expensive”
“No instructions and turned on for the first time and stating low battery”
“functions that once had buttons are now hidden in menus”
“The screen is very dark”
“Rubbish Piece of Junk”
“God knows what the stupid solar panel is for as it doesnt work without a charged battery”
“the layout makes it a bit hard to use”
“I know this because I dismantled it as soon as it arrived. see photograph”
“Dunno bout battery life”
Top return reasons
Common questions
- Is casio fx-991ex profitable to sell on Amazon United Kingdom?
- The niche generates £581K/yr across 10 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -10.8%. Flapen's verdict: Skip it (44/100).
- How competitive is the casio fx-991ex niche?
- 3 brands and 66 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in casio fx-991ex?
- Top complaints mined from reviews: Durability, Value For Money, Instructions/User Manual/Troubleshooting. The return rate is 1.1%.
- When does demand for casio fx-991ex peak?
- Demand peaks in Aug–Sep; the busiest month runs 35.3× the quietest.
- What does it cost to enter the casio fx-991ex niche?
- Listings span £15.12–£95.68; the average listing price is £36.06 (sweet spot $15–$100). The average incumbent carries 3,226 reviews — the moat a new listing must climb.