---
title: "Secret Diary for Girls — £105K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/stationery-office-supplies/secret-diary-for-girls"
last_updated: "2026-07-31T11:42:03.546Z"
locale: en
meta:
description: "Niche score 54/100 · £105K/yr market · 233K searches/yr · £10.84 avg price. Soft demand (-11.7% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · £105K/yr market · 233K searches/yr · £10.84 avg price. Soft demand (-11.7% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Secret Diary for Girls — £105K/yr Amazon UK Niche (2026) - Flapen"
---
# **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.
Market size 26Growth 19Conversion 51Competition 79Returns 95Price range 68Avg price 40Brand share 66Review moat 87Quality gap 38
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Review moat**
**Great****255.69**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Great****36%**
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**
**Good****65%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Good****4.2%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Okay****£10.84**
avg listing price — sweet spot $15–$100
**Quality gap**
**Okay****4.5★**
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**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%")
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 ~~](https://flapen.com/research/methodology)
## **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**
**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%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -11.7% search growth over the last 90 days.
15K10KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Holiday '25Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Nov, Dec · busiest ÷ quietest = 5.2×
[**Open Trend **](https://flapen.com/research/uk/stationery-office-supplies/secret-diary-for-girls/trend)
## **Top secret diary for girls search terms**
- **secret diary for girls**45K/yr-3.8%3.4% conv. - **girls diary**31K/yr-10.3%3.5% conv. - **kids diary**27K/yr-14.3%2.0% conv. - **secret diary**28K/yr-14.7%2.0% conv. - **diary for girls**20K/yr-0.4%1.9% conv. - **diary with lock for girls**16K/yr-18.9%3.8% conv. - **girls diary with lock and key**5K/yr+75.1%5.8% conv. - **kids diary with lock and key**9K/yr-36.1%2.3% conv. - **diary for kids**7K/yr-18.1%2.2% conv. - **lockable diary for girls**11K/yr-17.7%4.4% conv. [**All search terms **](https://flapen.com/research/uk/stationery-office-supplies/secret-diary-for-girls/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.
0%3%£3K6%£6K9%£9K12%£13K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**£11.34**4.5★92 rev](https://www.amazon.co.uk/dp/B0F43Y2MKW) [2**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**£8.45**4.5★86 rev](https://www.amazon.co.uk/dp/B0D1KKDSB4) [3**Candcamp Purple Secret Diary with Lock for Kids**Candcamp**£9.08**4.6★40 rev](https://www.amazon.co.uk/dp/B0FDQ1DK8L) [4**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**£13.62**4.6★118 rev](https://www.amazon.co.uk/dp/B0FGX4Q4WM) [5**Pop Secret Diary for Girls w/ Invisible Pen Lock Notebook for Girl Gifts**GINMLYDA**£8.08**4.3★104 rev](https://www.amazon.co.uk/dp/B0DC737PPB)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Candcamp Purple Diary with Lock for Girls**Candcamp**£9.26**6 rev8mo ago](https://www.amazon.co.uk/dp/B0G2XDBQ3M) [**Candcamp Pink Secret Diary with Lock for Kids**Candcamp**£8.42**40 rev9mo ago](https://www.amazon.co.uk/dp/B0FWK62TK2) [**Cat Diary with Lock 18x14cm 160 Pages Pink Kids Notebook with Padlock**GINMLYDA**£5.18**114 rev10mo ago](https://www.amazon.co.uk/dp/B0FPPXR7BH) [**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**£13.62**118 rev1y ago](https://www.amazon.co.uk/dp/B0FGX4Q4WM) [**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**£35.90**242 rev1y ago](https://www.amazon.co.uk/dp/B0FF591VXR)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Candcamp Pink Secret Diary with Lock for Kids**Candcamp**£8.42**4.6★**▲ 310%**](https://www.amazon.co.uk/dp/B0FWK62TK2) [**Candcamp Purple Diary with Lock for Girls**Candcamp**£9.26**4.8★**▲ 233%**](https://www.amazon.co.uk/dp/B0G2XDBQ3M) [**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**£11.34**4.5★**▲ 125%**](https://www.amazon.co.uk/dp/B0F43Y2MKW) [**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**£13.62**4.6★**▲ 102%**](https://www.amazon.co.uk/dp/B0FGX4Q4WM) [**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**£35.90**4.3★**▲ 81%**](https://www.amazon.co.uk/dp/B0FF591VXR)
**~~View all trending →~~**
## **What buyers say about secret diary for girls**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**21%
*“Good quality”*
**Gifting Purpose**18%
*“attractive gift”*
**Value For Money**17%
*“Good for the price”*
**Locking Mechanism**8%
*“lock is easy to set up”*
**Fun/Entertainment Experience**8%
*“Cute and fun little set”*
**Color**7%
*“good colour”*
**Design-Overall**4%
*“the designs are extremely cute”*
**Advertised Vs Actual Product**3%
*“As described”*
**Paper Quality**3%
*“lovely paper quality very happy with purchase”*
**Writing Experience**3%
*“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-Overall**17%
*“Doesnt work”*
**Value For Money**12%
*“A waste of money”*
**Quality-Overall**10%
*“Poor quality”*
**Stain Resistance**8%
*“Paid more than I would for a normal notebook for a cardboard piece of trash that is staining my hands pink”*
**Durability**6%
*“just maybe not the most durable”*
**Ease Of Use**6%
*“difficult to open”*
**Strength**5%
*“a bit flimsy”*
**Brightness/Shine/Glow**4%
*“The only negative is that the sparkles are quite sharpat the edges”*
**Thin**4%
*“Very thin”*
**Advertised Vs Actual Product**4%
*“NOTHING like the photos”*
### **Top return reasons **
**Functionality-Overall**27%
**Locking Mechanism**12%
**Defective Material/Parts**9%
**Quality-Overall**7%
**Size-Overall**6%
**Advertised Vs Actual Product**6%
**Gifting Purpose**4%
**Durability**4%
**Color**3%
**Value For Money**2%
## **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.
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