diary with lock
Worth a lookShows no brand lock-in (top 5 brands take 42% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Brand share
Great42%top-5 brand share — no brand owns this niche
Returns
Great1.1%return rate — above 6% kills the launch gate
Competition
Great24%top-5 click share — an open shelf
Price range
Great$6.70–$92.06cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$16.57avg listing price — sweet spot $15–$100
Review moat
Good1,002.31avg incumbent reviews — the moat a new listing must climb
Market size
Good$431K$431K/yr · 1.4M searches
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Conversion
Bad1.8%search→purchase rate — share of searches ending in a sale
Growth
Bad-14.3%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, diary with lock is a $431K/yr Amazon United States market (1.4M searches/yr). The top 5 brands hold 42% of demand. Demand peaks in Nov–Dec. Verdict: Worth a look — 59/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
Market data
- Units sold / yr
- 40K–50K
- avg 250–500/product
- Revenue / yr
- $663K–$829K
- units × avg price
- Launch success
- —
- 1 of 3 new (360d)
- Conversion rate
- 1.8%
- Avg BSR
- #208
- Page quality
- 0%
- Prime
- 99%
- Sponsored
- 96%
- Out of stock
- 1.5%
- Avg brand age
- 39 months
- Avg seller age
- 167 days
Competition
Clicks spread well past the top 5 (24% combined) — an open shelf where new products get seen.Brands
49 rising
Sellers
59
Top-5 brand share
42%
Top 20: 81%
Top-5 click share
24%
Top 20: 57%
Open market
53%
- WEMATE15%
- CAGIE8%
- ZXHQ7%
- ZICOTO6%
- Hoci Poci6%
- GINMLYDA5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -14.3% search growth over the last 90 days.Peak months: Nov, Dec · busiest ÷ quietest = 2.3×
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 94 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
ZXHQ Lock Journal with Pen A5 240 Pages Diary with Lock Brown Edge Refillable Leather Hardcover (8.5 5.9inch) Dark Green
ZXHQ$14.854.5★1,827 rev
CAGIE Diary with Lock for Girls and Women A5 Journal with Lock for 8 10 11 12 14 16 Year Old Girls Gifts Presents 192 Pages Waterproof Journal for Girls Ages 8-12 with Pen Marble Diary Purple
CAGIE$14.194.6★1,938 rev
WEMATE Diary with Lock A5 PU Leather Journal with Lock 240 Pages Vintage Locks Journal Password Notebook with Pen Locks Diary Planner Organizer for Men and Women 8.6x5.8in Black
WEMATE$15.524.5★2,429 rev
WEMATE Journal with Lock Diary with Lock Password Notebook Pen & Gift Box - Perfect for Men and Women - 4.3X 6.18in Black Keep Your Secrets Safe
WEMATE$10.674.4★903 rev
Hoci Poci Diary with Lock and Keys for Girls Gift Ideas 360 Gold Edged Pages Journal for Women B6 Refillable Notebook for Writing with Pen and Bookmark (Garden Pink)
Hoci Poci$19.104.8★1,892 rev
Newest
by launch date
Kiadneii Diary with Lock for Girls Cute Journal with Lock and Key 8PCS Diary Gift Set Birthday Gift Idea for Teen Girls Secret Lockable Diary Ideal Gifts for 8 9 10 11 12 13 14 Year Old Girls
Kiadneii$21.7611 rev
Yonavita Purple Glitter Diary with Lock & Key No-Shed Sparkle Secret Journal Birthday Gift for Girls Ages 6-12 A5 Lined Notebook 8.4x5.7 with Pen Refill Bracelet & Gift Box
Yonavita$22.1039 rev
Mzj.Office DIY Journal Kit for Girls Ages 8-12 200+PCS Teen Tween Girl Gifts Trendy Stuff Party Favors for Kids 8-12 Birthday Gift for Girls.
Mzj.Office$19.7129 rev
Blue Sky Good Vibes Notebook 160 Lined And Perforated Pages 5.75 x 8.5 Gold Durable Twin Wire Binding Flexible Glitter Shaker Cover Party Dots Pink
Blue Sky$7.9128 rev
Lock Diary for Women Diary with Lock for Girls A5 Leather Locked Journal 260 Pages 100 GSM Refillable Journal with Lock for Teens Secrets Flower Journals with Combination Passwords 5.7x8.3 Green
Ovesmusl$16.63179 rev
Trending
90-day click momentumMzj.Office DIY Journal Kit for Girls Ages 8-12 200+PCS Teen Tween Girl Gifts Trendy Stuff Party Favors for Kids 8-12 Birthday Gift for Girls.
Mzj.Office$19.714.5★
Kiadneii Diary with Lock for Girls Cute Journal with Lock and Key 8PCS Diary Gift Set Birthday Gift Idea for Teen Girls Secret Lockable Diary Ideal Gifts for 8 9 10 11 12 13 14 Year Old Girls
Kiadneii$21.765.0★
CAGIE Journal with Lock Gifts for Women Men Retired Colleagues to Record Life Travel Plans 7.5 x 10 Inch 220 Pages Lock Diary with Pen Gift Box
CAGIE$45.374.5★
LockNote A5 Business Notebook with Lock Leather Portfolio Organizer Fingerprint Security Wireless Charging 8000mAh Power Bank Binder with Zipper Card Holder Journal & Gift Box Red/Black
LockNote$92.064.6★
WEMATE Journal with Lock A6 PU Leather Diary with Lock 240 Pages Locked Journal Password Notebook with Pen & Gift Box Locking Diary Planner Organizer for Men and Women 4.3X 6.18in Blue
WEMATE$11.494.4★
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The variety is impressive”
“Given as a gift”
“Great Deal”
“Lock mechanism seems sturdy”
“Fun for kids”
“Blue color is gorgeous”
“Just as advertised”
“The design is cute”
“Paper looks durable for markers or pens”
“Size perfect for a kid”
What buyers complain about
“The lock sucks”
“Cheap Low Quality”
“barely fits through”
“Good Product Bad Instructions”
“Broke quickly”
“I do think it's a bit overpriced for what you get”
“it never worked”
“it was difficult to close it”
“Color is off”
“For example: If you have a bad day you might not be able to write about all of it cause the pages are short”
Top return reasons
Common questions
- Is diary with lock profitable to sell on Amazon United States?
- The niche generates $431K/yr across 94 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -14.3%. Flapen's verdict: Worth a look (59/100).
- How competitive is the diary with lock niche?
- 49 brands and 59 sellers compete. The top 5 products take 24% of clicks and top 5 brands hold 42% of demand.
- What do buyers complain about in diary with lock?
- Top complaints mined from reviews: Locking Mechanism, Quality-Overall, Size-Overall. The return rate is 1.1%.
- When does demand for diary with lock peak?
- Demand peaks in Nov–Dec; the busiest month runs 2.3× the quietest.
- What does it cost to enter the diary with lock niche?
- Listings span $6.70–$92.06; the average listing price is $16.57 (sweet spot $15–$100). The average incumbent carries 1,002 reviews — the moat a new listing must climb.
Related niches in Office Products
- 59book lovers giftsWorth a look
- 59book accessoriesWorth a look
- 60teacher bookmarkWorth a look
- 60bulk bindersWorth a look
- 60transparent dried flower bookmarksWorth a look
- 60magazine bagWorth a look