UD5 Toolkit
Random Animal Soundboard - Online Hear Real Calls
Click buttons to play real animal sounds: lion roar, bird tweet, dolphin click. Studio recorded. No load.
All Tools
999+ toolsDigital Swim Pace Clock – Online Interval Training Timer
Large screen pace clock with programmable send‑offs. Perfect for masters swimming workouts. Confirms your rest time.
Window Solar Heat Gain Calculator - Online Energy Efficiency Tool
Estimate solar heat gain through windows given SHGC and orientation. Understand cooling loads. Simple educational physics tool. Local.
Open Graph Image Generator - Online Social Card from Photo
Upload a photo and turn it into an optimized Open Graph image with title overlay. Perfect for blog social shares. Canvas.
Lenticular Print Generator - Online Interlace Two Photos
Interlace two images into a striped pattern for lenticular lens printing. Preview with simulated tilt. DIY fun.
Virtual Pet Tamagotchi - Online Feed & Play
Keep a virtual pet alive by feeding, playing, and cleaning. Its state persists in localStorage. Come back or it gets sad.
Webcam Cover Fit Checker – Will It Interfere with Laptop Closure?
Many slim laptops can crack the screen if a thick webcam cover is attached. Check your model's tolerance before sticking one on.
Heavy Bag Weight Selector – Your Weight Divided by 2
Enter your body weight to get the standard recommendation: a bag roughly half your weight. Also see filling material options.
Sports Bra Support Selector – Low, Medium & High Impact
Enter your cup size and planned activity to find the recommended encapsulation vs compression style and support level.
Training Mask Resistance Progression – Don't Overdo It
Select your fitness level to get a recommended starting resistance and weekly progression plan for an altitude simulation mask.
Compression Sack Volume Calculator – Before & After Straps
Enter the loft of your clothes and the sack dimensions to see how small it gets when compressed. Pack more efficiently.
Tinder Identification Quiz – Can You Find Dry Fluff in the Rain?
Identify the best natural tinder sources from photos. Practice before you're in a real emergency.
Bite Valve Cleaning Schedule – Prevent Mold in Soft Flasks
A weekly reminder to disassemble and soak the bite valve and straw. Keeps your hydration vest from tasting like a swamp.
Bodyboard Leash Quick Release Practice – Get Free When Snagged
Practice the motion of finding and pulling the quick‑release tab on your wrist leash. A timed drill for muscle memory.
Snorkel Mouthpiece Size & Material Selector – Avoid Jaw Fatigue
Based on your mouth size and any TMJ issues, choose a standard, small, or orthodontic mouthpiece for comfortable snorkeling.
Ear Equalization Method Finder – Valsalva, Frenzel & BTV
Describe your equalization difficulty and current technique to get a recommendation for which advanced method (Frenzel, BTV) to learn next.
Scuba Tank VIP & Hydro Reminder – Annual & 5‑Year Schedule
Log your tank's last visual inspection (VIP) and hydro test dates. Get alerts when they're due for renewal.
Latex Gasket Trimming Guide – Neck & Wrist Seal Adjustment
Enter the circumference of your neck or wrist and the gasket size to know how many rings to cut off. Trim slowly for a perfect seal.
Whitewater Helmet Fit Test – Shake, Roll & Nod Check
Follow the interactive shake, roll, and nod tests to see if your helmet fits snugly without moving. Adjust the straps correctly.
Throw Bag Stuffing Technique – Backpack vs Figure‑8 Coil
Compare the speed and tangle‑resistance of different methods for packing a throw rope. Choose the best for your PFD.
Cliff Jump Safety Depth Calculator – Minimum Water Depth by Height
Enter the jump height to see the absolute minimum water depth recommended. Always check for submerged objects first.
Kayak Wet Exit Drill Timer – Pool Practice Routine
A sequence timer for practicing wet exits: set up, capsize, wait 3 seconds, exit, and surface. Build muscle memory.
PFD Buoyancy Checker – Is Your Life Jacket Enough for Your Weight?
Enter your body weight to see the minimum buoyancy (in lbs) your PFD should provide. Check the label on your vest.
Kayak Paddle Shaft Diameter Selector – Hand Size & Joint Pain
Based on your hand size and any joint issues, choose between standard, small‑diameter, or ergonomic paddle shafts.
Packraft Inflation Pressure Guide – PSI for Water Temperature
Enter the water temperature to see the recommended packraft pressure. Avoid over‑inflation on hot days that can burst seams.
Pull Cord Length Estimator – Canyoneering & Caving Retrieval
Enter the rappel length and rope stretch to calculate the minimum pull cord length needed to retrieve your rope from the anchor.
Belay Device Friction Mode Guide – Standard vs Guide Mode
Visual guide showing how to thread your tube‑style device for standard belay, guide mode from above, and rappel.
Quickdraw Length Selector – Short vs Long for Rope Drag
Based on the route's wandering nature and your rope diameter, see whether to rack short or long quickdraws to reduce drag.
Bear Bag Hang Calculator – Height, Branch Distance & Counterweight
Calculate the required rope length and branch height to properly hang a bear bag 12 ft high and 6 ft from the trunk.
Camp Grill Grate Gap Safety – Prevent Food Falling Through
Enter the gap between bars and the size of your food pieces to see if they'll fall through. Use foil or a griddle if needed.
Sawmill Log Length Optimizer – Maximize Usable Lumber
Enter your log diameter and target board dimensions to find the best bucking lengths to minimize waste.
Splitting Maul Weight Selector – Match to Your Strength & Wood
Answer a few questions about your strength and the type of wood you split to get a maul weight recommendation (4 lb to 8 lb).
Camp Chair Seat Height Selector – Comfort for Tall & Short Campers
Enter your height and see whether a low‑style, standard, or high‑back camp chair will be easiest to get in and out of.
Down Loft Restoration Checker – Tumble Dry with Tennis Balls
Photos show good loft vs flattened loft. Instructions for low‑heat drying with tennis balls to re‑fluff down after storage.
Outdoor Gear Expiration Tracker – Helmets, Ropes & Harnesses
Log the purchase date of safety gear and get alerts based on manufacturer recommended lifespan (e.g., helmets every 5‑10 years).
Personal Poop Kit Inventory – Build a LNT Bathroom Bag
Select your trip type and group size to get a list of items for a complete backcountry bathroom kit. Stay clean and pack it out.
DIY Handwashing Station Planner – Bottle, Soap & Bleach Setup
A visual guide to setting up a simple handwashing station with a water jug, soap, and a strainer for group camps.
Filter Backflush Timer – Maintain Flow Rate of Sawyer/Platypus
A reminder to backflush your hollow‑fiber filter after a certain number of liters or when flow rate drops. Keeps water flowing.
Sternum Strap Height Finder – Prevent Shoulder Strap Slippage
Based on your torso length and pack size, find the optimal height for the sternum strap, usually just below the collarbone.
Tent Zipper Maintenance Log – Lubricate Before It Snags
Log the number of nights used and get a reminder to apply zipper lubricant before the zipper starts sticking. Prolong tent life.
Head Net Visibility Tester – Which Color Hinders Vision Least?
Upload a scene photo and overlay different head net mesh colors to compare how well you can see through them.
Campfire Bread Stick Selector – Peeled Willow or Metal Skewer?
Select the type of dough and cooking method to get the recommended stick thickness and wood type for perfect dough‑on‑a‑stick.
Knife Sharpening Angle Trainer – Hold Your Pocket Stone Correctly
Use your phone's gyroscope to practice holding a knife at exactly 20° on a flat stone. Build muscle memory for field sharpening.
Bivy Sack Condensation Risk Estimator – Dew Point & Breathability
Enter the overnight temperature and humidity to estimate condensation inside a bivy sack. Decide if you need extra ventilation.
Flash‑to‑Bang Lightning Distance – Seconds to Miles/Km
Tap when you see the lightning and tap again when you hear thunder. The tool calculates the distance and advises if you're in the danger zone.
Offline Map Rectangle Viewer – Does Your Tile Set Cover This Area?
Draw a rectangle on a world map and the tool displays the approximate latitude/longitude bounds. Helps you confirm offline map downloads.
Campsite Level Check – Phone Clinometer for Your Sleeping Platform
Use your phone's accelerometer as a digital level to see how tilted your sleeping platform is. Find the best spot to park.
Multi‑Use Gear Savings Calculator – One Item, Many Jobs
List two items you plan to replace with one multi‑use item and see the weight and space saved. Simplify your pack.
Biodegradable Soap Safe Distance Checker – From Water Source
Even biodegradable soap should be used 200ft from water. Enter the river or lake location and see a circle showing where to wash.
Mosquito Net Drape Calculator – Achieve 360° Coverage
Enter your sleeping area dimensions to find the ideal suspension point height and line length so the net drapes without touching your skin.
WAG Bag Usage Calculator – How Many for Your Trip?
Based on the number of people and days, calculate how many waste alleviation and gelling bags to pack for a Leave No Trace trip.
Sleeping Bag Liner Temperature Boost Estimator
Select your sleeping bag's rating and add a liner to see how many extra degrees of warmth you gain. Extend your bag's range.
Tarp Tensioner Knot Tutorial – Adjust Guyline Without Un‑tying
Animated steps to tie a prusik loop onto a guyline and a slipped buntline hitch, creating an easily adjustable tensioning system.
Hammock Structural Ridgeline Length – 83% Rule Calculator
Enter your hammock length to get the ideal fixed ridgeline length (83% of hammock length). Achieve a consistent, comfortable sag.
Backpack Load Lifter Adjustment Guide – 45‑Degree Angle Check
Use your phone's camera to measure the angle of your load lifter straps. Get feedback on whether they're at the ideal 45° for weight transfer.
Crampon Anti‑Balling Plate Compatibility Checker
Select your crampon model to see if a factory or aftermarket anti‑bailing plate is available and how to attach it.
River Crossing Safety Evaluator – Depth & Speed Limits
Enter the estimated water depth and current speed to assess if it's safe to ford. Know when to turn back.
Field Repair Kit Planner – Build a Custom Kit for Your Activity
Select your outdoor activity and trip length to generate a list of essential repair items: tenacious tape, needle, thread, zip ties, etc.
TV Show Finder for Language Learners – By Level & Genre
Select your target language and current level to get a list of TV shows with simple dialogue, perfect for comprehensible input.
Flip Turn Trainer – Audio Beep for Approaching the Wall
Set a repeating beep to practice your flip turns. The beep sounds when you should start your turn based on your swim speed.