One of the fastest-growing technological trends in recent years has to be the use of RFID innovations, which are becoming increasingly commonplace in a wide variety of applications.
RFID (radio-frequency identification) uses wireless radio-frequency electromagnetic fields to identify and interpret electronically stored information contained within tags. These tags can be attached to objects.
The applications of RFID are vast and growing, as the technology can be used in any application involving storage and interpretation of electronic data. Grocery stores, public transportation, accessibility, travel and automotive services are just a handful of sectors that have already embraced RFID technology.
Some of RFID's most high-tech uses involve robotics and transportation, where the use of RFID tags can guide mechanical devices through their physical environment. RFID tags are also used in vending machines and other dispensing devices to enable customized dispensing of products.
RFID innovations have also proven to be a potential force for social good, as they are being used in applications that improve accessibility, dissuade crime and promote education, to name just a few.
100 RFID Innovations
100
Bicycle Vending Machine
BikeDispenser.com
99
Dual Action Smart Guns
The Armatix iP1 Only Fires Within Range of Its Watch Counterpart
98
Front Pocket Wallets
Bridge Keeps Your Valuables at the Front and Eliminates Back Pain
97
Self-Serve Wine Bars
This Machine at Park 112 Automatically Serves Wine to Patrons
96
Interactive Fitting Room
MagicMirror
95
Credit Card Protectors
The HuMn Wallet Blocks Identity-Stealing RFID Signals
94
Eco Water Coolers
The Ishke Water Dispenser Relies on a Smart System of Reusable RFID Canteens
93
Clever Key-Seeking Devices
The Finder RFID Locator Will Ensure You Never Fully Lose Your Effects
92
Desktop Dinner Processors
The Desktop Microwave is a Computer Peripheral For Preparing Food
91
GPS-Trackable Wallets
The Freedom Wallet by Royce Leather has a GPS Tracking System
90
Emotion-Sensitive Bags
LadyBag Helps the Forgetful
89
Gadget Gives Shoppers Independence
Motorola Sparrow
88
Hacker-Proof Travel Totes
The New Tumi ID Lock Collection Blocks RFID Signals
87
Social Auto Likes
The Renault Card Links Your Visit to the Amsterdam Motorshow Through Facebook
86
Compartmentalized Liquid Wallets
This Liquid Wallet is Perfect for Keeping Yours Keys in Place
85
Mouthless Fembots
German-Made AILA Robot Reads RFID Tags and Has Great Hair
84
Blogger Sleep Shells
The Hermit Nap Station Uses Tech to Give Geeks a Rest
83
Head-Mounted Motorbike Indicators
Signal Helmet Break Light Increases Bikers' Street Visibility
82
Refined Intruder Alarms
The Scout Home Security System Looks Smooth and Operates That Way Too
81
Trackable Luggage Concepts
Bag2Go's RFID Chip Ensures That You'll Never Lose a Bag Again
80
Intelligent Refrigerators
Touch Screen Fridge With RFID Tag Reader
79
Hi-Tech Foot Garments
The BlackSocks Smarter Socks Ensure Men Don't Misplace Them Ever Again
78
Real Life Video Games
SXSW's Mario Karting Reimagined is a Different Kind of Augmented Reality
77
Locating Luggage Tags
The Samsonite Stork Bag Tag Keeps Tabs on Your Possessions in Transit
76
Anti-Wireless Theft Wallets
The Pocket Vault Stops RFID Cards From Being Hacked or Stolen
75
Paper-Playing Turntables
The IDEO C60 Redux Turns Collages into Mix Tapes
74
Light-Writing Apparel
GLOWFFITI Allows You to Write With Light
73
Educational Magnifying Glasses
The Alien Eye is Designed to Make the World Globe Interactive
72
Futuristic RFID Refrigerator
In My Fridge Displays What's Inside Without the Need to Open It
71
Budget-Saving Bracelets
The Debitband Concept Payment System is a Physical Fiscal Reminder
70
Theft-Blocking Wallets
The Bantam Wallet by James Watson is Made From Kangaroo Leather
69
Tag-Scanning Clothes Washers
Smart Chime Washing Machine Ensures You're Following the Directions
68
RFID Grocery Tags
Replacing Traditional Bar Codes Could Lead to Faster Checkouts
67
Laser-Cut Paper Stereos
Matt Brown's Rfid Radios Brings Flat-Pack Fun to Internet Radio
66
Elderly Air Travel Aids
The Airport Compass Helps Guide Travelers to Their Gates
65
Stainless Steel Wallets
This Stewart Stand-Designed Wallet is Made From Recycled Material
64
Inner Ocular Chillers
The Smart Fridgerator Can See its Contents and Display Them for You
63
Holographic ID Cards
OLED Samsung E-Passport Features Rotating Image of Your Head
62
All-Inclusive Mobiles
The T-Glove is Your Wallet, Cellphone, MP3 Player and More
61
RFID Social Networks
Jive
60
Foldable Pet Food Dishes
These Pocketable 'Slurpabowls' Can be Brought on Walks
59
Smartphone-Propping Wallets
The Cobra Wallet Protects Your Money and Works Great with Your Phone
58
Subway Pass-Replacing Rings
This RFID Jewelry Ring Replaces Traditional Subway Fare Cards
57
Check Stand Grocery Prams
The GoFa Shopping Cart Records All of the Items You Put into Your Cart
56
Olympic Obstacle Course Campaigns
The New Zealand Powerade Challenge Tests Your Stamina
55
Memory-Stimulating Music
'Transcendental Tunes' Hopes to Make Memories New and Meaningful
54
Rugged Handheld Tablets
The Panasonic Toughbook H1 Field Tablet
53
For Senior Citizen Baby Boomers
Nokia 'Health Guard'
52
Futuristic Danish Tricycles
The Yamaha Hecta is a 21st Century Christiania Bike
51
Policing Trash Carts
The RFID Recycling Bin Reports if Owners aren't Disposing Garbage Properly
50
Automatic Locking Bags
The iBag Saves You From Reckless Spending By Automatically Locking Itself
49
Web-Connected Home RFID Tags
Violet's Ztamps Fuse Your Online and Offline Worlds
48
Dog Dishes for Dudes
The Man Bowl Lets Manners Go Out the Doggie Door
47
Door-Unlocking Smartphone Protectors
The CalypsoCase with CalypsoKey Does Away with Common Keys
46
iPad Brew Trackers
The Yelp Kegmate Can Monitor All Aspects of Your Drinking
45
Informative Power-Saving Plugs
The Sony 'Authentication Power Outlet' Can Determine Power Useage
44
Loss-Detection Totes
The Deja Vu RFID Purse Knows When You Forget Your Keys
43
Robot Helps Lost People
Robovie
42
Leather Quickdraw Wallets
The Dash Wallet is Redesigned to Look Suave in Durable Leather
41
RFID Shoes
The WESC KarmaTech Creates an On-The-Go Interactive Experience
40
Sporty Hi-Tech Windbreakers
The SCOTTeVest TEC Jacket 2.0 Boasts an Entertaining Hood
39
Robotic Shuttles
Masdar Tests Driverless Autos in Net Zero Energy Community
38
Pregnant Women Wristbands
The Night Agency 'RFIDlifeband' Alerts Mothers to Checkups
37
Musical Bookshelves
The Wazz AL by NoDesign
36
Projected Direction Headgear
The Arrow Gas Mask Guides You Safely from Burning Buildings
35
Digital Pedestrian Piracy
Electronic Pick Pocketing is Dangerously Easy
34
Vocabulary-Building Robots
Kibot is a New Electronic Pet That Boosts Kids' Education
33
Equality-Encouraging Dishware
The Smart Dish System Singles Out Who Does the Dishes More
32
RFID Chip Tattoos
Artist Anthony Antonellis Embeds a Re-Programmable Chip into His Hand
31
Hunger-Alleviating Ads
The 'Food Link' Campaign Let Users Carry Virtual Food Between Two Ads
30
Sightless Expedition Aids
The Peepo Explorer Helps Guide the Blind Through the Urban Jungle
29
Magical Media Players
The Skal Device Controls Digital Media via RFID Reader
28
RFID Tag Jewelry
Amy Johnston's 'Hidden Agenda' Collar
27
Flipping Money-Holders
Flipside Wallet Sorts Through Cards with a Push of a Button
26
Digital Pup Detectives
The Bionic Dog Sniff Can Identify and React to Anything
25
In-Store Discount Apps
The Brouha App Reminds Users of Deals the Second They Step Into the Store
24
RFID Tickets
Beijing 08 Olympic Security
23
Digitally Dissolved Dinners
The NutriSmart System Keeps Tabs on Every Bite You Consume
22
Health Payment Bracelets
Vitaband Stores Health Data and Pays Your Medical Bills
21
Futuristic Family Freighters
The Renault Frendzy is Designed to Seamlessly Go From Work to Play
20
Buoyant Orb Exhibitions
The 'Light Drift' Installation Floated on the Schuylkill River
19
Sleek Handgun Storage Cases
The Gun Box Ensures Only Owner Has Access to Its Dangerous Contents
18
Durable Metallic Wallets
The Wallet Design of the Trayvax Makes it Long-Lasting
17
Practical Mesh Wallet Organizers
The Mesh Cards Made by Studio Silo are Ultra Thin Pocket Tools
16
USB Train Tickets
The Weneo ID Smart USB Card
15
Blind Grocery Guides
The Love Card from Shen Ming Makes Sightless Grocery Shopping Easier
14
High-Tech Sports Facilities
The RFID Golf Range
13
Literal Snail Mail
Real SnailMail Sends Emails Using Live Gastropods
12
High-Tech Skate Parks
Nutri-Grain's Cool Skate Park Was Equipped with Tech to Capture Tricks
11
Digital Sound Tutors
The Talking Pictures Toy Teaches Kids With an RFID Chip
10
Radio Burial Beacons
Hippensteel Funeral Services and Crematory Creates RFID Grave Markers
9
Brick Superhero Lights
The LEGO Green Lantern Lamp is a Heroic Piece of Art
8
Senior Shopping Aids
The HelloTag from Moonhwan Lee Provides Elderly Retail Aid
7
Mobile Cooking Aids
'The Chef' Makes Life Infinitely Easier for the Family Foodie
6
Tree-Tracking Chips
The Green Action Institute is Preventing Deforestation with RFIDs
5
Subtle Cyclist Alarms
The RFID Bikealarm Emits a 120dB Shriek When Your Bike is Being Boosted
4
Anti-Texting and Driving Gadgets
Key2SafeDriving Prevents Text Messaging on the Road
3
Andrew Sztein, Trend Hunter (INTERVIEW)
Sztein Looks at Waterloo Labs as They Recreate Mario Kart
2
Drunk-Detecting Urine Analyzers
The Pee Analyzer Uses Urinals to Stop Drunk Driving
1
Microchip Student Safety Programs
This Student Locator Program Uses RFID Technology to Track Kids
Related Ideas
Conceptual AI-Powered Wearables
The Rabbit R1 AI Watch by Alisher Ashimov is Feature-Rich
Technology-Driven Retail Spaces
ARK Visual Unveils Future Stores as an Immersive Retail Identity
RFID-Enabled Sport Sneakers
BANBROKEN ARTDesign Sport Shoes Have the TAP-Tech Feature
Customizable Workplace Productivity Lights
The Busy Tag Lets Users Express Themselves
AI-Powered Waste Trackers
The Binit Household Waste Tracker Streamlines Recycling
Ceiling-Mounted Laundry Racks
GoodLiving Presents a Multifunctional Retractable Laundry Rack
Outdoor Asset Tracking Systems
Ubisense Has Announced the Release of Its New Dimension4™ RTK-Tag
Enhanced In-Store Inventory Management
Old Navy Enters into a Strategic Partnership with RADAR
Wearable AI Productivity Devices
The 'Omi' Wearable Works with the User's Smartphone
Autonomous Micro Markets
Micromart Features Digital Price Tags & AI Product Recognition Sensors
AI-Fuelled Robot Gold Trolleys
Futurewave and Botronics Design the iXi Robot Trolley
AI-Powered Laundry Robots
The TENET AI Laundry Robot Adjusts According to Needs
Automated Enterprise Laundry Robots
Watney Robotics' System can be Controlled Remotely
AI-Fueled Smartwatch Concepts
Rabbit Joins Teenage Engineering on the R1 Smartwatch Design
State-of-the-Art Retail Fragrance Dispensers
iRomaScents Enhances the Retail Experience with Tech
AI-Driven Washing Innovations
Henkel Unveiled Smartwash Technology at CES 2025
Wearable AI Retail Assistants
Augmodo Unveils a New Pilot Affecting Four Warehouse Locations
Groundbreaking Sticker Technology
StickerYou Recently Launched Its Image Transfer Sticker Product
Habit-Building Wearable Devices
The Conceptual 'DAY ONE' Tracker Can Be Attached onto Anything
Protective Fan-Style Wallets
The Shuffle Wallet Has Anti-RFID Technology, Easy Access and More
Wearable AI Smart Rings
The WIZPR RING Can Control a Smart Home Without the Need for a Remote
Tactile Vehicle Key Fobs
This Conceptual Car Key Fob by Zander De Beer is Ergonomic
Futuristic Imaginative Design Concepts
Toyota Introduces the Unique E-Collection of Products
Sleek Compact Tracker Devices
The Pebblebee Tag Finds Devices with the New Google Network
AI-Powered Recycling Systems
The Conceptual 'Binko' Recycling Machine Automates Sorting
Connected Luggage Tags
The Knog Scout Travel is Compatible with Apple Find My
AI-Driven Fitness Solutions
Wave Company Recently Introduced Its TracMe Innovation to the World
Pet Safety Collars
DOG iD Debuts Two New Products Designed to Enhance Pet Safety and Durability
AI-Augmented Retail Checkouts
This Checkout Solution Helps Prevent Theft and Scanning Errors
AI-Fueled Wearable Pins
The Humane AI Pin is Packed with Various Assistive Tech Tools
Accessible Titanium Smart Rings
The 'Y-RING' Supports Health Monitoring, Gesture Control and More
AI Retail Wearables
Augmodo SmartBadges Track Tasks and Inventory in Real Time
Multi-Cat Smart Fountains
The Dockstream RFID Smart Fountain Tracks Individual Pet Behaviors
Display-Equipped Item Trackers
The 'PhotoTag' Tracks Items for Up to 10 Months Per Charge
Remote Pet Care Systems
The RCA Smart Pet Feeder Takes Care of Furry Friends at CES 2024
Golf Car Charging Stations
WiTricity Offers Wireless Charging Solution for Electric Golf Cars
AI-Powered Meal Scanners
AI Meal Scan Uses Image Recognition to Track Nutrients & Portions
Magnetic Multi-Functional Straps
The Dual by Zenlet Accommodates One's Badge and Phone
Computer-Vision Self-Service Kiosks
Toshiba's Vision Kiosk Identifies Items Without Barcodes
Discreet Biofeedback Brain Trainers
The Flowtime® Brain Tag Captures Ample Data
Senior-Targeted Wearable Devices
Lifeline Canada Debuts 'On The Go with Wandering'
NFC-Enabled Golden Tags
MNTGE and StockX Join Forces to Launch the StockX Golden Tag
Self-Locating Wallets
The ESR Geo Wallet Integrates an Apple-Certified Find My Network
Scan-to-VR Technologies
Teleport by Varjo Creates Digital Twins for Real-World Locations
Automated Insulin Delivery Wearables
The Tandem Mobi Works with or Without a Smartphone
Discreet Card-Sized Trackers
The Nomad Tracking Card Fits Neatly into Wallets
Touch Message Wearables
The Bond Touch 4 Helps People Stay Connected with Haptic Technology
Efficiency-Focused Healthcare Technologies
Datalogic Debuted Its Technologies at HIMSS 2025
Clothing Buy-Back Programs
Eileen Fisher Revolutionizes Clothing Recycling with Renew Program
Pet Health-Monitoring Technologies
Industrial Technology Research Institute Presents iPetSuite
Connected Clothing Tag Removers
The 'LUKE' Care Label Remover Eliminates Scratchy Clothing Tags
QR Code-Embedded Kid's T-Shirts
Malwee Debuts a Collection of Me Encontre T-Shirts for Kids
Smart Home Security Fobs
The Arlo Security Tag Key Fob Eliminates the Need for Keys and Codes
Advanced Adaptive Retail Experiences
Walmart Unveiled New Retail Technologies at CES 2024
Stylish Multifunctional Item Trackers
The Moto Tag Works with Motorola and Android Smartphones
Barcode-Less Product Scanners
SeeChange Taps Diebold Nixdorf to Create AI Checkout Tools
AI-Powered Marketing Tools
This E-Commerce Tool Uses Customer Data to Project Reward Impacts
Digitized Retail Shelf Labels
Lidl GB is Rolling Out Electronic Shelf Labels to All Its Stores
AI-Powered Dog Collars
The PetPace Health 2.0 Intelligently Tracks Canine Health
Simple AI Assistants
The Rabbit R1 Offers a Non-Distracting Digital Alternative
Trend Prediction Services
Tagwalk Revolutionizes Fashion Forecasting with a New AI Dashboard
Inventive Retail Strategies
H&M is Working to Localize Its Shopping Experience
AI-Powered Vehicle Repair Solutions
RAVIN AI Showcases RepairIQ During ITC Vegas 2024
Mini Luggage-Compatible Trackers
Apple Unveils a New AirTag Feature for Tracking Missing Luggage
AI-Powered Exit Technology
Sam's Club's AI Exits Speeds Up Customer Receipt Verification
Web3 Fashion Show Initiatives
Runway Magazine Launches Re-Inventing the Runway
Minimalist Industrial Wallet Designs
The REAF Wallet Holds Up to Seven Cards and Banknotes
Prototype Robotic Laundry Systems
A Team of Researchers from Unibo Are Developing a Laundry Robot
Digital Product Passport Solutions
Eviden's Digital Product Passport Supports Blockchain
AR Fashion Creations
The ETERNITEE AR Platform Enhances Consumer Interaction
Smart Wearable Pet Trackers
ANOCRD Design Creates the Sustainable GoChip Device for Pets
Programmable QR Code Tags
Openscreen's Cloud Tags Help Users Digitize Their Lives
In-Store Audience Engagement Solutions
Social Shelf® Has a Novel Approach to Customer Engagement
Advanced Automotive AI Technology
VinAI Aims to Revolutionize Safety, Convenience, and Efficiency
AI-Powered Genetic Identifications
iLoF Technology Creates Digital Spaces for Biomarkers
Hyper-Traceable Pet Foods
Goodlands Uses On-Pack QR Codes to Support Ingredient Transparency
Smart Wearable Companions
'Friend' is A Wearable Device for Combatting Loneliness
AI-Powered Plastic Collection
Aldi is Utilizing AI to Track Plastic Packaging from Customers
Future-Facing Charging Concepts
These Wireless Charger Concepts Imagine a True Wire-Free Future
Reactive Robotic Textile Technologies
MotorSkins SELK Technology Brings Textiles to Life
Miniature Tile Bluetooth Trackers
Life360 Introduces the Comprehensive Dynamic Tile Bluetooth
Refrigerated Vending Machines
The REDYREF Smart Food Fridge Uses RFID Technology
Virtual Fencing Systems
Nofence Offers the Future of Virtual Livestock Management
Device-Locating Digital Ecosystems
Google is Officially Launching its 'Find My Device' Service
Compact Sleek Bluetooth Trackers
Motorola Offers a Bluetooth Tracking with the Moto Tag
Advanced Tech Component Designs
MICROIP Debuts an Advanced IC Design and an AI IoT Platform
Shoppable Fridge Screens
Samsung Unveils a New Partnership with Instacart for On-Fridge Shopping
Wearable Skin Protection Devices
A.C. Camargo Cancer Center Launches a Wearable UV Detector
Human-Like AI Agents
D-ID Agents Can Answer Questions in Two Seconds with 90% Accuracy
Real-Time AI Chat Bots
D-ID Agents Have Dynamic and Natural Customer Service Interactions
High-Power Item Trackers
The 'ICETAG' Offers Three-Years of Battery Life and More
Geo-Targeting Store Advertisements
Tesco Recommends Ads Based on a Shopper's Location in a Store
Digital Sticky Note Tools
QR-NOTE Introduces a Modern Twist to the Traditional Sticky Note
Electronic Shelf Label Technologies
Sexton Group & JRTech Solutions Promote Operational Efficiency
Automated Retail Receipt Checkers
Sam’s Club Receipt Verification Was Announced at CES 2024
AI-Powered Location Technologies
The City of Busan Unveils the 'Finding All' AI Technology
Global Digital Marketplaces
Renaissance Hotels' R FINDS Shares Goods from Local Artisans
Electromagnetic Shielding Apparel
Ohmni Creates Apparel Protecting Wearers from Unseen Waves
AI-Powered CCTV Systems
Amazon Unveils a New Emotion-Detecting AI Software for Train Passengers
Digitized Retail Shelf Labels
Croatian Retailer Studenac is Implementing Electronic Shelf Labels
QR Code Shopping Assistants
Nintendo Implemented Icecat Tech to Enhance In-Store Shopping
Car-Identifying Apps
Scout Helps Enthusiasts Identify a Vehicle
Recipe-Recommending Smart Fridges
Samsung's Bespoke 4-Door Flex Refrigerator Offers "AI Vision"
Assistive Grocery Store Solutions
Facilio's Software Offers Refrigerant Tracking & Leak Detection
Nanotechnology-Enhanced Watch Protectors
The Watch Protect Company Debuts Innovative Solutions
Palm-Enabled Contactless Payments
Amazon is Using Artificial Intelligence to Read Customer's Palms
Loss Prevention AI Checkouts
Vynamic Smart Vision Shrink Reduction Addresses Self-Checkout Issues
Advanced Printing Techniques
BrandMyDispo Has Introduced Printing Techniques for Custom Mylar Bags
Inventory Management Drone Fleets
IKEA Adds a Fleet of Inventory Drones in its Logistics
Frictionless QR-Based Resale Features
eBay is Introducing the New 'Resell on eBay' Feature
Roving Security Surveillance Robots
The RB-WATCHER Detects People, Animals, Bags and More
Research-Focused Label Printing
GA International's LabTAG Division Debuts New Integration
Smart Reusable Fish Crates
IFCO's Marina Uses Bluetooth Tags & QR Codes to Collect Real-Time Data
AI-Powered Checkout Models
Amazon's Just Walk Out Technology Supports Seamless Checkouts
Checkout-Free Convenience Systems
7-Eleven Australia Integrates a Checkout-Free Shopping System
Antitheft Car Key Carriers
The KEEBOO Car Key Faraday Shield Prevents Hacking
Wearable Rugby Reports
England’s Red Roses' Apparel Draws Attention to the Gender Gap in Sports
Sleek Modern Trackable Wallets
The Nomad Tracking Card is a Compact Credit Card Tracker
Warehouse Worker-Focused Efficiency Devices
AgozTech Debuts the Mobile Printer Waist Belt
Award-Winning Public Safety Technology
SOLVIT System's iSAR™ Has Been Recognized at CES 2025
Order Fulfillment Shelf Labels
Instacart Carrot Tags Help with Picking Orders from the Shopper App
NFC-Enabled Business Cards
The Mobilo Smart Business Card Works with Any Smartphone
Cellular Transport Freeze Techniques
NTHU Develops an Impressive Cellular Transport Process
Outdoor Sales Kiosks
DynaScan Technologies Launches the New Kiosks for Outdoor Use
Expiration Management Tools
East of England Co-op Taps Retail Insight for a New Waste Solution
Palm-Recognizing Smart Locks
Phillips PalmLock Can Recognize Up to 50 Unique Palms
Optimized Communication Network Solutions
The O-RAN ALLIANCE Debuts Innovations at Mwc Barcelona
AR Merchandising Tools
Instore Activation Enhances Trade Marketing With Real-Time AR Solutions
Modern Business Card Scanners
Spreadly Scan Brings Networking to the Modern Age
High-Tech Residential Security Systems
The Next Gen Smart Lock Boasts Biometric Authentication
Vehicle Security Ranges
Trackershop Debuts a New Line of Auto Trackers for Consumers in the UK
Home Organization Tracking
WhereThings Helps You Organize and Locate Your Belongings Effortlessly
Modern Pet Tagging
PuppySignal Uses a QR Tag System to Locate Lost Pets Quickly
Comprehensive GPS Product Ranges
Lightning GPS is a Prominent Player in the GPS Tracking Industry
Technical Research Fellowships
NextBeam Supports Electron Beam Processing Education
Digital Scam Detection Tools
Google is Rolling Out New Tools to Keep Users Safe From Scams
AI-Enabled Biometric Smart Locks
The Desloc B200 Speeds Up Access with Advanced Technology
Accessibility Travel Aids
Rakun Card Simplifies Travel with a Card to Communicate Needs Discreetly
Safety-Improving Positioning Wearables
Tended Works to Enhance Safety in Industrial Environments
Tag-Based File Management
Ritt Organizes Files with Tag Trees for Efficient and Precise Management