Lechem
Shiurim — how much is enough, in things you can actually see
A kzayis, a revi'is, the amount that obliges a bracha acharona — given in measures a person can picture, with the different opinions named rather than flattened into one.
Lechem is a helper and a reminder. It is never a ruling. For anything halachic, ask your Rav.
Almost every practical question about brachos ends in a measurement. Did you eat enough to owe a bracha acharona? Is this a drink or a sip? How much of it was bread? People know the words kzayis and revi'is and still could not point at the amount on a plate.
Lechem gives the measures the way a person needs them: not only in millilitres, but in what they look like — a cup you own, a slice you would actually cut, a piece you can hold up. The atlas exists precisely because a number in a book has never once helped anybody at a kiddush.
The opinions are not flattened. Where there is a range — and on shiurim there is famously a range — Lechem names the positions and shows the span, rather than silently picking one and presenting it as the answer. It will also tell you plainly when the safe course is simply to eat a little more or a little less and remove the question.
This is reference material, kept off the front of the app so it does not clutter an ordinary day, and found instantly by search when you need it. It touches halacha directly, so it carries the app's own line: it is a helper, not a ruling, and your Rav is the address.
In the app
The screens this page is about, with the app’s own names for them.
- Shiurim
- How much is a shiur?