Is secret diary for girls profitable to sell on Amazon United Kingdom?

The niche generates £105K/yr across 49 tracked products. 0 of 11 products launched in the last 360 days are still selling. 90-day search growth is -11.7%. Flapen's verdict: Worth a look (54/100).

How competitive is the secret diary for girls niche?

24 brands and 59 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 65% of demand.

What do buyers complain about in secret diary for girls?

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

When does demand for secret diary for girls peak?

Demand peaks in Nov–Dec; the busiest month runs 5.2× the quietest.

What does it cost to enter the secret diary for girls niche?

Listings span £4.95–£35.90; the average listing price is £10.84 (sweet spot $15–$100). The average incumbent carries 256 reviews — the moat a new listing must climb.

secret diary for girls

Worth a look

Shows low returns (0.9%), but soft demand (-11.7% this quarter) keeps it on the watch list.

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Review moat

Great255.69

avg incumbent reviews — the moat a new listing must climb

Competition

Great36%

top-5 click share — an open shelf

Price range

Good£4.95–£35.90

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

Brand share

Good65%

top-5 brand share — brands hold most of the demand

Conversion

Good4.2%

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

Avg price

Okay£10.84

avg listing price — sweet spot $15–$100

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Okay£105K

£105K/yr · 233K searches

Growth

Bad-11.7%

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

Signals No Dominant Brand

According to Flapen's Amazon United Kingdom niche tracking, secret diary for girls is a £105K/yr Amazon United Kingdom market (233K searches/yr). The top 5 brands hold 65% of demand. Demand peaks in Nov–Dec. Verdict: Worth a look — 54/100.

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

secret diary for girls market data

Units sold / yr: 8K–10K; avg 100–250/product
Revenue / yr: £87K–£108K; units × avg price
Conversion rate: 4.2%
Avg BSR: #75
Page quality: 0%
Prime: 100%
Sponsored: 86%
Out of stock: 7.1%
Avg brand age: 31 months
Avg seller age: 180 days

Competition & brand share

Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.

Brands

24 falling

Sellers

Top-5 brand share

65%

Top 20: 98%

Top-5 click share

36%

Top 20: 77%

Open market

29%

GINMLYDA18%
JIALILI17%
Candcamp13%
Invalidism9%
VTech7%
Kteeurqer5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -11.7% search growth over the last 90 days.

Peak months: Nov, Dec · busiest ÷ quietest = 5.2×

Open Trend

Top secret diary for girls search terms

secret diary for girls45K/yr -3.8%3.4% conv.
girls diary31K/yr -10.3%3.5% conv.
kids diary27K/yr -14.3%2.0% conv.
secret diary28K/yr -14.7%2.0% conv.
diary for girls20K/yr -0.4%1.9% conv.
diary with lock for girls16K/yr -18.9%3.8% conv.
girls diary with lock and key5K/yr +75.1%5.8% conv.
kids diary with lock and key9K/yr -36.1%2.3% conv.
diary for kids7K/yr -18.1%2.2% conv.
lockable diary for girls11K/yr -17.7%4.4% conv.

All search terms

Top secret diary for girls 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

JIALILI Diary with Lock for Girls & Women - 360 Pages Journal with Lock and Keys Pen and Gift box Gift Ideas for Birthday Christmas Cute Journals Set for Girls Ages 8-14 (Lavender Purple)

JIALILI£11.344.5★92 rev

Invalidism Bear Secret Diary for Girls Kids Stationary Sets Girls Stationary Sets for Girls Secret Diary with Lock and Pen Girls Stationary Gift Sets for 6-13 Year Old Girls Notebooks for Girls

Invalidism£8.454.5★86 rev

Candcamp Purple Secret Diary with Lock for Kids

Candcamp£9.084.6★40 rev

Kteeurqer Diary with Lock for Girls Aged 6-14 - Girls Diary Gift Set Password Locked Journals for Teen Girls 9-Piece Set Present for Girls Birthday Festival and Back-to-School

Kteeurqer£13.624.6★118 rev

Pop Secret Diary for Girls w/ Invisible Pen Lock Notebook for Girl Gifts

GINMLYDA£8.084.3★104 rev

Newest

by launch date

Candcamp Purple Diary with Lock for Girls

Candcamp£9.266 rev

8mo ago

Candcamp Pink Secret Diary with Lock for Kids

Candcamp£8.4240 rev

9mo ago

Cat Diary with Lock 18x14cm 160 Pages Pink Kids Notebook with Padlock

GINMLYDA£5.18114 rev

10mo ago

Kteeurqer Diary with Lock for Girls Aged 6-14 - Girls Diary Gift Set Password Locked Journals for Teen Girls 9-Piece Set Present for Girls Birthday Festival and Back-to-School

Kteeurqer£13.62118 rev

1y ago

Secret Creator Secret Video Journal Fingerprint-Locked Video Diary with LED Lights 15 Filters & 4GB Storage Secure Creative electronic Journal for Kids Aged 7+

Canal Toys£35.90242 rev

1y ago

What buyers say about secret diary for girls

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

What buyers love

Quality-Overall21%

“Good quality”

Gifting Purpose18%

“attractive gift”

Value For Money17%

“Good for the price”

Locking Mechanism8%

“lock is easy to set up”

Fun/Entertainment Experience8%

“Cute and fun little set”

Color7%

“good colour”

Design-Overall4%

“the designs are extremely cute”

Advertised Vs Actual Product3%

“As described”

Paper Quality3%

“lovely paper quality very happy with purchase”

Writing Experience3%

“In general, it's a cute, well-made diary that inspires kids to be creative and gives them a place to write down their memories”

What buyers complain about

Functionality-Overall17%

“Doesnt work”

Value For Money12%

“A waste of money”

Quality-Overall10%

“Poor quality”

Stain Resistance8%

“Paid more than I would for a normal notebook for a cardboard piece of trash that is staining my hands pink”

Durability6%

“just maybe not the most durable”

Ease Of Use6%

“difficult to open”

Strength5%

“a bit flimsy”

Brightness/Shine/Glow4%

“The only negative is that the sparkles are quite sharpat the edges”

Thin4%

“Very thin”

Advertised Vs Actual Product4%

“NOTHING like the photos”

Top return reasons

Functionality-Overall27%

Locking Mechanism12%

Defective Material/Parts9%

Quality-Overall7%

Size-Overall6%

Advertised Vs Actual Product6%

Gifting Purpose4%

Durability4%

Color3%

Value For Money2%

Common questions

Is secret diary for girls profitable to sell on Amazon United Kingdom?: The niche generates £105K/yr across 49 tracked products. 0 of 11 products launched in the last 360 days are still selling. 90-day search growth is -11.7%. Flapen's verdict: Worth a look (54/100).
How competitive is the secret diary for girls niche?: 24 brands and 59 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 65% of demand.
What do buyers complain about in secret diary for girls?: Top complaints mined from reviews: Functionality-Overall, Value For Money, Quality-Overall. The return rate is 0.9%.
When does demand for secret diary for girls peak?: Demand peaks in Nov–Dec; the busiest month runs 5.2× the quietest.
What does it cost to enter the secret diary for girls niche?: Listings span £4.95–£35.90; the average listing price is £10.84 (sweet spot $15–$100). The average incumbent carries 256 reviews — the moat a new listing must climb.