---
title: "Diary with Lock — £38K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/stationery-office-supplies/diary-with-lock"
last_updated: "2026-07-31T12:23:46.549Z"
locale: en
meta:
description: "Niche score 51/100 · £38K/yr market · 163K searches/yr · £10.87 avg price. A small market ($38K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · £38K/yr market · 163K searches/yr · £10.87 avg price. A small market ($38K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Diary with Lock — £38K/yr Amazon UK Niche (2026) - Flapen"
---
# **diary with lock**
**Worth a look**
Shows low returns (0.9%), but a small market ($38K/yr) keeps it on the watch list.
Market size 10Growth 18Conversion 27Competition 92Returns 96Price range 26Avg price 41Brand share 85Review moat 86Quality gap 50
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Competition**
**Great****23%**
top-5 click share — an open shelf
**Review moat**
**Great****283.77**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Great****50%**
top-5 brand share — no brand owns this niche
**Quality gap**
**Good****4.5★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Okay****£10.87**
avg listing price — sweet spot $15–$100
**Conversion**
**Okay****2.2%**
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**](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, 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 ~~](https://flapen.com/research/methodology)
## **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**
**44**
**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.
6K4KSpike '24Holiday '24Spike '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Nov, Dec · busiest ÷ quietest = 2.4×
[**Open Trend **](https://flapen.com/research/uk/stationery-office-supplies/diary-with-lock/trend)
## **Top diary with lock search terms**
- **diary with lock**39K/yr-15.2%1.9% conv. - **lockable diary**31K/yr-14.6%1.9% conv. - **journal with lock**23K/yr-7.4%1.8% conv. - **notebook with lock**14K/yr-12.1%1.9% conv. - **lockable notebook**12K/yr-13.4%1.8% conv. - **lockable journal**11K/yr-21.3%1.3% conv. - **lock diary**8K/yr-22.2%1.7% conv. - **lockable journal for adults**6K/yr+28.3%2.9% conv. - **locked journal**6K/yr-15.0%2.3% conv. - **locked diary**6K/yr-14.9%2.1% conv. [**All search terms **](https://flapen.com/research/uk/stationery-office-supplies/diary-with-lock/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.
0%2%£7664%£2K6%£2K8%£3K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**£11.15**4.6★565 rev](https://www.amazon.co.uk/dp/B0CD26XWB7) [2**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**£12.71**4.5★72 rev](https://www.amazon.co.uk/dp/B0B49NYFCK) [3**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**£8.30**4.3★13 rev](https://www.amazon.co.uk/dp/B0DZXPJJB3) [4**Kesote A5 Diary with Lock 212 Pages - Black**Kesote**£8.00**4.4★404 rev](https://www.amazon.co.uk/dp/B0C2XL3CRH) [5**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**£12.69**4.5★609 rev](https://www.amazon.co.uk/dp/B0DQQ312PS)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**GenYoung Lockable Diary A5 PU Leather Secret Password Journal**GenYoung**£5.66**0 rev3mo ago](https://www.amazon.co.uk/dp/B0GX51JLTT) [**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**£7.83**0 rev3mo ago](https://www.amazon.co.uk/dp/B0GWH3KNX7) [**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**£7.33**29 rev6mo ago](https://www.amazon.co.uk/dp/B0GG4LTHXG) [**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**£7.37**29 rev6mo ago](https://www.amazon.co.uk/dp/B0GG4S49B2) [**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**£8.93**21 rev9mo ago](https://www.amazon.co.uk/dp/B0FX9SV8QN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**£7.83**0.0★**▲ 442%**](https://www.amazon.co.uk/dp/B0GWH3KNX7) [**GenYoung Lockable Diary A5 PU Leather Secret Password Journal**GenYoung**£5.66**0.0★**▲ 431%**](https://www.amazon.co.uk/dp/B0GX51JLTT) [**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**£7.33**4.2★**▲ 337%**](https://www.amazon.co.uk/dp/B0GG4LTHXG) [**Kaiyzo A5 Vintage Diary with Lock Daily Journal with Lock in PU Leather Journal Notebook Lockable Diary with Pen Holder and Card Slots Leather Notebook Black**Kaiyzo**£8.30**4.1★**▲ 200%**](https://www.amazon.co.uk/dp/B0FWBXBCXF) [**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**£7.37**4.2★**▲ 185%**](https://www.amazon.co.uk/dp/B0GG4S49B2)
**~~View all trending →~~**
## **What buyers say about diary with lock**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**30%
*“Amazing quality”*
**Locking Mechanism**16%
*“Lock works well”*
**Value For Money**13%
*“Great value for money”*
**Gifting Purpose**7%
*“attractive gift”*
**Design-Overall**6%
*“Beautifully designed”*
**Paper Quality**5%
*“Beautifully designed journal with nice paper”*
**Writing Experience**4%
*“able to keep my day to day in writing”*
**Color**4%
*“I absolutely love the colour”*
**Security**3%
*“Good security”*
**Advertised Vs Actual Product**2%
*“What I expected”*
### **What buyers complain about **
**Locking Mechanism**34%
*“lock is rubbish”*
**Functionality-Overall**10%
*“Doesnt work”*
**Value For Money**8%
*“Looks more expensive than it is”*
**Durability**6%
*“It broke the second day we got it”*
**Ease Of Use**5%
*“Couldn't open”*
**Instructions/User Manual/Troubleshooting**4%
*“All instructions followed”*
**Adhesion/Stickiness**3%
*“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”*
**Thickness**3%
*“Much thinner than I imagined”*
**Gifting Purpose**3%
*“It's a shame because it was meant to be a birthday present”*
**Ink Leakage**3%
*“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 Mechanism**45%
**Functionality-Overall**14%
**Size-Overall**6%
**Instructions/User Manual/Troubleshooting**5%
**Defective Material/Parts**3%
**Gifting Purpose**3%
**Quality-Overall**3%
**Mechanism Issues**2%
**Jamming/Clogging**2%
**Color**2%
## **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.
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