– Q. See question above. Dear Rabbi. Can one then just write the day of the Omer on a paper?
A. On Teshuva 785 we wrote;
“Q. During sefira I twitter a reminder in the early night to the members of our college students group to count sefira. It has happened that I have forgotten to count myself later on when I miss mariv in shul. Would I be yotze just with the writing of that twitter on my i-phone, if I intended that in case I forget later that should count?
A. Poskim disagree if writing is tantamount to speaking in regards to counting sefira. Kol Eliahu (30), Ksav Sofer (Y.D. 106) quoting Chasam Sofer, rule that even if writing is not generally equal to talking, in regards to counting sefira it is. Conversely, Birkei Yosef (489: 14), Mahari Asad (Y.D. 316), maintain the opposite. Even if writing is by and large considered like verbalizing, in sefira it is not since the Torah requests counting. (See also Teshuvos Rabi Akiva Eiger 29 and 30).
Since Poskim disagree, one who counted by writing should if able, count again articulating the count without a brocho, or someone else who has not yet counted should recite the brocho for him.
(See following questions).
Rabbi A. Bartfeld as revised by, Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit'a