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Secret Diary for Girls

Secret Diary for Girls shows low returns (0.9%), but soft demand (-11.7% this quarter) keeps it on the watch list.

Flapen Score

54
Worth a look
Market size 26Growth 19Conversion 51Competition 79Returns 95Price range 68Avg price 40Brand share 66Review moat 87Quality gap 38
This niche Category average

Is Secret Diary for Girls profitable on Amazon?

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.

Secret Diary for Girls: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -11.7% over the last 90 days and 4.2% of searches end in a purchase.

£105K

revenue / yr

Units sold / yr10K
Search volume / yr-11.7%233K
Conversion rate4.2%
Avg price£10.84

Who owns the niche?

The top 5 brands hold 65% of demand, so 35% of the market is open.

35%

open market share

Brands · sellers24 · 59
Top-5 product click share36%
Open market35%
Avg brand age31 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.

0/100

page quality · 49 products

Sponsored placement86%
New entrants (1y)11· 0 succeeded
Avg rating4.5★
Avg reviews256

Top Secret Diary for Girls products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

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

£0£3K£6K£9K£13K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

24 falling

Sellers

59

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%

Secret Diary for Girls demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume233KCVR4.2%Products49Brands24Top 5 Brands65%OOS Rate7.1%Rating4.5★Reviews256Avg BSR#75
15K10KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Holiday '25Prime Day '26SepDecMarJunAugNovMarMay

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

Top Secret Diary for Girls search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • secret diary for girls45K/yr
  • girls diary31K/yr
  • kids diary27K/yr
  • secret diary28K/yr
  • diary for girls20K/yr
  • diary with lock for girls16K/yr
  • girls diary with lock and key5K/yr
  • kids diary with lock and key9K/yr
  • diary for kids7K/yr
  • lockable diary for girls11K/yr

What reviews say buyers love and hate about Secret Diary for Girls

What buyers mention most, as a share of all reviews.

What buyers love

90% of reviews
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

What buyers complain about

76% of reviews
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

Secret Diary for Girls return rate & reasons

Why buyers send it back, as a share of all return requests.

0.9%

Return rate

19%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Functionality-Overall
27%
2Locking Mechanism
12%
3Defective Material/Parts
9%
4Quality-Overall
7%
5Size-Overall
6%

Common Secret Diary for Girls questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Secret Diary for Girls 54/100 on Amazon United Kingdom — Worth a look. The niche generates £105K/yr across 49 tracked products. 0 of 11 products launched in the last 360 days are still selling. Search demand moved -11.7% over the last 90 days.
Search demand for Secret Diary for Girls on Amazon United Kingdom peaks in Nov–Dec, where the busiest month runs 5.2× the quietest.