Free, in your browser
Free tools
Each Lucernel app does one job on the iPhone. Each of these tools does a small part of that job on the web, for free and without an account: decode a VIN, read a stool chart, see the pressure falling, count the days to a litter. Every tool shows its method and its sources, so you can check the math.
Bible verses for temptation
Pick what you are facing right now. You get one verse from the World English Bible and a short prayer to say with it, and a one-minute pause if the urge is still loud.
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VIN decoder and recall check
Type a 17-character VIN. You get what NHTSA knows about the vehicle, whether the check digit is valid, and the recalls issued for that make, model and year.
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Bristol stool chart
Pick the type that looks most like yours. You see what that type usually means, and the signs that mean you should call a doctor.
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Barometric pressure headache forecast
Enter a US ZIP code or use your location. You see the pressure for the next three days and the hours when it falls fastest, the change many people with migraine watch.
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Lawn fertilizer calculator
Enter the three numbers on the bag, your lawn size and the rate of nitrogen you want. You get the pounds of product per 1,000 sq ft, the total, and how many bags to buy.
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Book reading time calculator
Enter the pages of a book or its word count. Use the average adult reading speed or measure your own in one minute, and see how long the book takes and when you finish.
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Horse weight calculator
Measure the heart girth and the body length with a soft tape. You get the estimated weight in pounds and kilograms, using the formulas in the Merck Veterinary Manual.
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Dog due date calculator
Choose the date you know: ovulation, the LH peak or the breeding. You get the expected whelping window and the checkups along the way.
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Gundam Card Game odds calculator
Enter how many copies you run and the turn you need them by. You get the exact chance, with the 50-card deck, the 5-card hand and the one redraw built in.
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How these tools work
Everything that can run in your browser does: the calculators, the chart and the Bible verses never leave your device. The VIN decoder asks NHTSA directly from your browser, and the pressure forecast goes through our server to MET Norway, which needs to know where to forecast; neither keeps a record of who asked.
The numbers come from primary sources such as the Merck Veterinary Manual, NHTSA, US university extension services and the official Gundam Card Game rules. Each tool lists them with the date we last checked them.
