GET IT ON
Google Play
物守り
Guardian of Things
Your Collection OS
Get it on Google Play Have a backup file? Browse it locally in the Web Companion →
One app for everything
you collect.
Built for how you actually organize.
Most collection apps force you into their structure. Monomori adapts to yours — whether you're cataloging five items or five thousand, across one category or dozens.
46 categories. Or create your own.
From books to board games, vinyl to video games. If we missed something, build it yourself.
Books
Video Games
Manga
Music
Movies & TV
Figures
Trading Cards
LEGO
Plants
Board Games
Jewelry
Watches
Sneakers
Instruments
Antiques
Coins
Fountain Pens
Plushies
Handbags
Comics
Tarot & Oracle Decks
Vintage Toys
Whiskey, Wine & Sake
Tea & Coffee
+ 22 more
Plus custom categories with fields you define
Your collection,
your way.
Every field is optional. Show what matters, hide what doesn't.
Field Visibility
Toggle fields on or off. Only see what you actually track.
Drag & Drop
Reorder fields to match how you think about your items.
Custom Fields
Add your own fields to any category. Text, numbers, dates — whatever you need.
Search & Sort
Search across every category at once. In list view, tap any column header to sort.
Tools that save you time.
Scan, import, enrich, backup. Less busywork, more collecting.
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Barcode Scanning
Single or bulk scan. Point at a barcode and let Monomori look up the details.
Designed with care.
A collection app should feel as good as the things you're collecting.
12 themes — find the one that fits your style
Glassmorphic UI — soft gradients, frosted glass, subtle depth
Three view modes — Cards, Tiles, or List
Dynamic colors — matches your wallpaper on Android 12+
Ready to get organized?
Made by a collector who needed something better.
Have a backup file?
Load it in the Web Companion to browse your collection locally in any browser — no account, no upload, nothing leaves your device.
Open Web Companion →