StamCheck

A missing letter found after the writing is finished is a loss. StamCheck finds it while you write. Photograph the parchment with your phone and, within seconds, every letter is marked: green — matches the text, red — missing or extra, orange — a suspicion to check by hand. Tap a mark for the line, the letter's index from the right and the word. • Check each passage, even each line, as you write • Works with mezuzah, tefillin, Sefer Torah, Nevi'im and the megillot, and works out by itself which passage it is looking at. Anything else in the frame is not checked. • Strict on purpose: an extra mark beats a missing letter left unmarked. Check every red or orange mark against the parchment. A blurry photo is refused rather than guessed. • The check runs on the phone itself; your pictures are never sent anywhere. Works on filtered ("kosher") phones too. Sign in with a Google account is required. The first month is free, no card needed; then a subscription through Google Play — ₪50 a month or ₪500 a year, cancel any time. StamCheck is an aid and does not replace the inspection of a qualified sofer.