Is diary with lock profitable to sell on Amazon United Kingdom?

The niche generates £38K/yr across 78 tracked products. 0 of 29 products launched in the last 360 days are still selling. 90-day search growth is -13.3%. Flapen's verdict: Worth a look (51/100).

How competitive is the diary with lock niche?

38 brands and 44 sellers compete. The top 5 products take 23% of clicks and top 5 brands hold 50% of demand.

What do buyers complain about in diary with lock?

Top complaints mined from reviews: Locking Mechanism, Functionality-Overall, Value For Money. The return rate is 0.9%.

When does demand for diary with lock peak?

Demand peaks in Nov–Dec; the busiest month runs 2.4× the quietest.

What does it cost to enter the diary with lock niche?

Listings span £4.43–£18.69; the average listing price is £10.87 (sweet spot $15–$100). The average incumbent carries 284 reviews — the moat a new listing must climb.

diary with lock

Worth a look

Shows low returns (0.9%), but a small market ($38K/yr) keeps it on the watch list.

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Competition

Great23%

top-5 click share — an open shelf

Review moat

Great283.77

avg incumbent reviews — the moat a new listing must climb

Brand share

Great50%

top-5 brand share — no brand owns this niche

Quality gap

Good4.5★

avg incumbent rating — lower means beatable quality

Avg price

Okay£10.87

avg listing price — sweet spot $15–$100

Conversion

Okay2.2%

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

Price range

Okay£4.43–£18.69

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

Growth

Bad-13.3%

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

Market size

Bad£38K

£38K/yr · 163K searches

Signals No Dominant Brand

According to Flapen's Amazon United Kingdom niche tracking, diary with lock is a £38K/yr Amazon United Kingdom market (163K searches/yr). The top 5 brands hold 50% of demand. Demand peaks in Nov–Dec. Verdict: Worth a look — 51/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

diary with lock market data

Units sold / yr: 3K–4K; avg 0–100/product
Revenue / yr: £33K–£43K; units × avg price
Conversion rate: 2.2%
Avg BSR: #444
Page quality: 0%
Prime: 99%
Sponsored: 91%
Out of stock: 13.4%
Avg brand age: 39 months
Avg seller age: 185 days

Competition & brand share

Clicks spread well past the top 5 (23% combined) — an open shelf where new products get seen.

Brands

38 flat

Sellers

Top-5 brand share

50%

Top 20: 89%

Top-5 click share

23%

Top 20: 64%

Open market

45%

WEMATE18%
Kesote12%
ZXHQ9%
Candcamp5%
WHENZOO5%
NectaRoy5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -13.3% search growth over the last 90 days.

Peak months: Nov, Dec · busiest ÷ quietest = 2.4×

Open Trend

Top diary with lock search terms

diary with lock39K/yr -15.2%1.9% conv.
lockable diary31K/yr -14.6%1.9% conv.
journal with lock23K/yr -7.4%1.8% conv.
notebook with lock14K/yr -12.1%1.9% conv.
lockable notebook12K/yr -13.4%1.8% conv.
lockable journal11K/yr -21.3%1.3% conv.
lock diary8K/yr -22.2%1.7% conv.
lockable journal for adults6K/yr +28.3%2.9% conv.
locked journal6K/yr -15.0%2.3% conv.
locked diary6K/yr -14.9%2.1% conv.

All search terms

Top diary with lock 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★)2 products missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

ZXHQ Lock Diary with Pen Secret Diary with Lock A5 Ruled 240 Pages PU Leather Journal with Lock Refillable Brown Edge A5 Premium Grey

ZXHQ£11.154.6★565 rev

NectaRoy Vintage Lockable Diary B6 European Style Travel Journal with Lock PU Leather Password Notebook Planner Agenda Sketchbook Office School Supplies Student Stationery Birthday Gift 20x14cm

NectaRoy£12.714.5★72 rev

Diary with Lock A5 PU Leather Digital Notebook with Lock120 Sheets/240 Pages Password Locked Travel Notebooks with Pen A5 Fashion Password Book with LockDiary Personal Notebookfor Birthday Gifts - P

WHENZOO£8.304.3★13 rev

Kesote A5 Diary with Lock 212 Pages - Black

Kesote£8.004.4★404 rev

WEMATE Lock Journal with Pen & Gift Box A5 260 Pages Refillable Hardcover Leather Password Notebook for Writing Vintage Lock Diary for Women Girls Men Students 8.6 x 5.8 in Black

WEMATE£12.694.5★609 rev

Newest

by launch date

GenYoung Lockable Diary A5 PU Leather Secret Password Journal

GenYoung£5.660 rev

3mo ago

Merzio Diary with Pen and Lock 21.2 x 14.5 cm (A5) 200 pages Password PU Leather Journal Protected Notebook for Girls and Boys Retro Style Diary for Adults with Pen Black

Merzio£7.830 rev

3mo ago

AMFUN A5 Password Journal with Lock 200 Pages with Pen and Gift Box Set PU Leather Lockable Diary Notebook 8.6 x 5.8 in Ideal for Daily Journaling Work School Men Women & Students-Black

AMFUN£7.3329 rev

6mo ago

AMFUN A5 Password Journal with Lock 200 Pages with Pen and Gift Box Set PU Leather Lockable Diary Notebook with Vintage Gold Foil Pattern Ideal for Daily Journaling Work School

AMFUN£7.3729 rev

6mo ago

A5 Journal With Lock Vintage Leather Diary With Lock 200 Pages Lined Paper Notebook With Pen Secret Diary With Combination Password Locked Journal for Women Girls Travel Writing (Green)

CECOMBINE£8.9321 rev

9mo ago

What buyers say about diary with lock

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

What buyers love

Quality-Overall30%

“Amazing quality”

Locking Mechanism16%

“Lock works well”

Value For Money13%

“Great value for money”

Gifting Purpose7%

“attractive gift”

Design-Overall6%

“Beautifully designed”

Paper Quality5%

“Beautifully designed journal with nice paper”

Writing Experience4%

“able to keep my day to day in writing”

Color4%

“I absolutely love the colour”

Security3%

“Good security”

Advertised Vs Actual Product2%

“What I expected”

What buyers complain about

Locking Mechanism34%

“lock is rubbish”

Functionality-Overall10%

“Doesnt work”

Value For Money8%

“Looks more expensive than it is”

Durability6%

“It broke the second day we got it”

Ease Of Use5%

“Couldn't open”

Instructions/User Manual/Troubleshooting4%

“All instructions followed”

Adhesion/Stickiness3%

“Just received this diary packaging looks lovely diary looks lovely until opening it the binding fell apart very disappointing had to glue it because my granddaughter had been waiting all day for the delivery its her first diary otherwise I would of sent it back”

Thickness3%

“Much thinner than I imagined”

Gifting Purpose3%

“It's a shame because it was meant to be a birthday present”

Ink Leakage3%

“The pen supplied is Rubbish it leaks ink all over the page at least supply a decent pen for a journal”

Top return reasons

Locking Mechanism45%

Functionality-Overall14%

Size-Overall6%

Instructions/User Manual/Troubleshooting5%

Defective Material/Parts3%

Gifting Purpose3%

Quality-Overall3%

Mechanism Issues2%

Jamming/Clogging2%

Color2%

Common questions

Is diary with lock profitable to sell on Amazon United Kingdom?: The niche generates £38K/yr across 78 tracked products. 0 of 29 products launched in the last 360 days are still selling. 90-day search growth is -13.3%. Flapen's verdict: Worth a look (51/100).
How competitive is the diary with lock niche?: 38 brands and 44 sellers compete. The top 5 products take 23% of clicks and top 5 brands hold 50% of demand.
What do buyers complain about in diary with lock?: Top complaints mined from reviews: Locking Mechanism, Functionality-Overall, Value For Money. The return rate is 0.9%.
When does demand for diary with lock peak?: Demand peaks in Nov–Dec; the busiest month runs 2.4× the quietest.
What does it cost to enter the diary with lock niche?: Listings span £4.43–£18.69; the average listing price is £10.87 (sweet spot $15–$100). The average incumbent carries 284 reviews — the moat a new listing must climb.