Sefirat HaOmer is an iPhone app developed by RustyBrick Inc. It is a free app in the Education & Reference category. This app helps Jewish people count the Omer, a religious practice performed between the holidays of Pesach/Passover and Shavuot.

The app provides users with the correct day to say the prayer, along with the brachot (blessings) before and after each specific day. It reminds users to say the prayer after nightfall, usually around thirty minutes after sundown or following the Maariv prayer.

For an annual fee of 99 cents, Sefirat HaOmer offers daily push notification reminders. This feature ensures that users never miss a day of counting the Omer.