Is thinkdiag profitable to sell on Amazon United Kingdom?

The niche generates £87K/yr across 10 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -25.5%. Flapen's verdict: Skip it (24/100).

How competitive is the thinkdiag niche?

2 brands and 7 sellers compete. The top 5 products take 87% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in thinkdiag?

Top complaints mined from reviews: Functionality-Overall, Software/Application, Advertised Vs Actual Product. The return rate is 7.7% — above our launch gate.

When does demand for thinkdiag peak?

Demand peaks in Nov; the busiest month runs 1.7× the quietest.

What does it cost to enter the thinkdiag niche?

Listings span £65.27–£383.67; the average listing price is £249.29 (sweet spot $15–$100). The average incumbent carries 460 reviews — the moat a new listing must climb.

thinkdiag

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Review moat

Great459.6

avg incumbent reviews — the moat a new listing must climb

Avg price

Okay£249.29

avg listing price — sweet spot $15–$100

Market size

Bad£87K

£87K/yr · 26K searches

Conversion

Bad1.4%

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

Returns

Bad7.7%

return rate — above 5% kills the launch gate

Growth

Bad-25.5%

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

Competition

Bad87%

top-5 click share — a locked-up shelf

Price range

Bad£65.27–£383.67

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

Brand share

Bad100%

top-5 brand share — brand-locked demand

Signals High Returns High Price

According to Flapen's Amazon United Kingdom niche tracking, thinkdiag is a £87K/yr Amazon United Kingdom market (26K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Nov. Verdict: Skip it — 24/100.

Data updated Jul 18, 2026 · scored weekly · How we score niches

thinkdiag market data

Units sold / yr: 500–750; avg 0–100/product
Revenue / yr: £125K–£187K; units × avg price
Conversion rate: 1.4%
Avg BSR: #293
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 9.6%
Avg brand age: 45 months
Avg seller age: 222 days

Competition & brand share

The top 5 products capture 87% of clicks — a locked-up shelf that new listings rarely crack.

Brands

2 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

87%

Top 20: 100%

Open market

thinkcar98%
mucar2%

Demand & seasonality

Weekly Amazon search volume, last 69 weeks — -25.5% search growth over the last 90 days.

Peak months: Nov · busiest ÷ quietest = 1.7×

Open Trend

Top thinkdiag search terms

thinkcar9K/yr -20.1%1.0% conv.
thinkcar diagnostic tool7K/yr -39.6%0.7% conv.
thinkdiag 24K/yr +0.1%3.9% conv.
thinkdiag6K/yr -31.5%3.6% conv.

All search terms

Top thinkdiag 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 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Thinkdiag OBD2 Bluetooth Scanner All System OE Level Car Diagnostic Tools with Active Test ECU Coding 15+ Service Functions All Software 1 Year Free fits for iPhone & Android Phone

thinkcar£65.274.0★1,516 rev

thinkcar OBD2 Diagnostic Tool ThinkDiag 2 OBD2 Scanner Bluetooth 5.0 for iOS & Android All System & 15+ Reset Functions Car Diagnostic Tool with CAN-FD Protocol AutoVIN Active Test ECU Coding

thinkcar£101.914.0★600 rev

THINKCAR Car Diagnostic Tool TK689BT Bidirectional Diagnostic Tool All System Automotive Diagnostics OBD2 Car Scanner with Action Test 34+ Reset FCA Autoauth CANFD&DoIP Wireless Update

thinkcar£351.314.2★700 rev

THINKCAR Bidirectional Car Diagnostic Scan Tool Thinkscan 672 Full System OBD2 Scanner with 28+ Reset Functions Active Test FCA AutoAuth CANFD Support

thinkcar£303.044.4★246 rev

Thinkcar Car Diagnostic Tool Thinkscan Max2 All System Automotive Scan Tool OBD2 Scanner Bluetooth With Auto VIN 32G ROM And 28 Maintenance Services Oil/IMMO/EPB/SAS/TPMS Reset.Lifetime Free Upgrade.

thinkcar£265.704.3★384 rev

Newest

by launch date

OBD2 Car Diagnostic Scanner THINKCAR PLUS S7 7 System Code Reader for Engine/ABS/SRS/ECM/TCM/BCM/AC/IC 28 Maintenance Functions Choose 5 Scanner for DIY Mechanics Auto Technicians Car Enthusiast

thinkcar£164.3621 rev

2mo ago

THINKCAR Bidirectional Car Diagnostic Scan Tool Thinkscan 672 Full System OBD2 Scanner with 28+ Reset Functions Active Test FCA AutoAuth CANFD Support

thinkcar£303.04246 rev

3mo ago

THINKCAR 689BT OBD2 Diagnostic Tool Bidirectional Car Scanner with 35+ Reset Services Full System Diagnosis CAN FD & DoIP FCA AutoAuth Wireless Updates for 140+ Vehicle Brands

thinkcar£383.676 rev

3mo ago

OBD2 Diagnostic Scanner ThinkScan 662 Car Scanner with 12 Reset Services + 4 System Diagnostics (ECM/TCM/SRS/ABS) Active Testing Auto Tool CANFD Protocol Free Lifetime Updates

thinkcar£139.0750 rev

1y ago

MUCAR AI-Assisted OBD2 Scanner 892BT Full System Scan Tool Bi-Directional Car Diagnostic Scanner ECU Coding 35+ Services FCA Autoauth CANFD and DOIP Android 10.0 Free Lifetime Upgrade

mucar£356.51674 rev

1y ago

What buyers say about thinkdiag

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

What buyers love

Ease Of Use20%

“Ease of use”

Quality-Overall13%

“The build quality feels decent enough to survive a bit of rough handling in the garage making it ideal for home maintenance”

Value For Money11%

“Very good for the money”

Connectivity-Overall10%

“Connectity is great”

Maintenance And Repair8%

“The selectable maintenance functions are a nice feature”

Strength5%

“Sturdy product feels solid”

Efficiency4%

“It helped me discover the problem of my car”

Instructions/User Manual/Troubleshooting3%

“The interface is straightforward enough to navigate”

Advertised Vs Actual Product3%

“just as advertised”

Design-Overall2%

“It looks class”

What buyers complain about

Functionality-Overall13%

“also coding is not working”

Software/Application10%

“app says not”

Advertised Vs Actual Product10%

“Didn't do what it advertised”

Compatibility-Overall8%

“have found it does not cover volvo v70 2004”

Connectivity-Overall7%

“forgetting to disconnect the device from the car”

Quality-Overall6%

“cheap”

Sensor4%

“Excellent, diagnosed the problem straight away on my van as the rear wheel ABS speed sensor faulty, got a replaced from the local motor factory for £16, and fixed it, my my local Peugeot dealer was quoting £250 for a diagnosis and repair, so it's paid for itself already”

Charging4%

“Unforseen charges”

Adhesion/Stickiness4%

“Not even sticky stuff remuval can take it off”

Touch/Button Controls4%

“the touch screen ignores the first prod if my fingers are oily”

Top return reasons

Compatibility-Overall39%

Functionality-Overall27%

Connectivity-Overall7%

Advertised Vs Actual Product5%

Defective Material/Parts5%

Software/Application4%

Value For Money2%

Size-Overall2%

Measurement/Reading Accuracy2%

Certifications1%

Common questions

Is thinkdiag profitable to sell on Amazon United Kingdom?: The niche generates £87K/yr across 10 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -25.5%. Flapen's verdict: Skip it (24/100).
How competitive is the thinkdiag niche?: 2 brands and 7 sellers compete. The top 5 products take 87% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in thinkdiag?: Top complaints mined from reviews: Functionality-Overall, Software/Application, Advertised Vs Actual Product. The return rate is 7.7% — above our launch gate.
When does demand for thinkdiag peak?: Demand peaks in Nov; the busiest month runs 1.7× the quietest.
What does it cost to enter the thinkdiag niche?: Listings span £65.27–£383.67; the average listing price is £249.29 (sweet spot $15–$100). The average incumbent carries 460 reviews — the moat a new listing must climb.