EHAQ 1.0.2

What size is this screw? Lay it next to a coin, take one photo, and EHAQ tells you: thread size, pitch and length, metric or SAE.

EHAQ (Everyone Has A Quarter) uses a coin you already own as its ruler. No calipers, no thread gauge, no guessing at the hardware store.

PRECISION MEASUREMENT, APPROXIMATE REFERENCE
A coin is an everyday reference, not a lab standard, so EHAQ measures carefully and tells you how sure it is. When it is confident, you get one answer. When two sizes are too close to tell apart from a photo (an M5-0.8 and a #10-32 differ by 0.17 mm), EHAQ shows both and tells you how to check, instead of guessing.

HOW IT WORKS
1. Pick your coin and the approximate size: MICRO (under 3 mm), MEDIUM or LARGE.
2. Lay the screw below the coin on white paper and take the photo. The app lights the screw itself.
3. Frame the coin, then the screw, with guided lines, a magnifier and short how-to videos.
4. Mark a few threads with your finger for the pitch.
5. Get the result: size, pitch, threads per inch, length, metric or SAE, coarse or fine.

WHAT IT MEASURES
• Metric screws from M1 up to M24, coarse and fine threads
• SAE / inch screws from #00 up to 1 inch, UNC, UNF and UNEF
• Length, including partly threaded bolts (total and threaded length)
• Right- or left-hand thread

VERIFY BEFORE YOU BUY
A side-by-side page draws the candidate threads at life size next to your photo, so you can confirm pitch and length with your own eyes. The shop button opens a search for the size EHAQ found.

COINS
US quarter, Canadian quarter, Mexican 2 peso, 1 euro, UK 10p, Japanese 100 yen and Indian 2 rupee.

LANGUAGES
English, German, Spanish, French, Italian and Japanese.

YOUR PRIVACY
EHAQ collects no data. No account, no ads, no tracking. Your photos are analyzed on your phone and never leave it.

PHONES
Works best on iPhones with a macro camera: iPhone 13 Pro, 14 Pro and 15 Pro (and Pro Max), and every iPhone 16 and 17 model except iPhone 16e and iPhone Air. Other iPhones use the main camera. Screws under 3 mm (MICRO) are not available on iPhone 12 Pro Max, 13, 13 mini, 14 and 14 Plus, whose cameras cannot focus close enough. Requires iOS 17.6 or later.

EHAQ's measurement method is protected by U.S. Patent No. 10,810,755.

License: Commercial