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computer science

Shabbos App

Shabbos App is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Shabbos App rather than just read about it. In short: The Shabbos App claimed to be a proposed Android app to enable Orthodox Jews, and Jewish Sabbath-observers, to use a smartphone on the Sabbath. The app was supposed to appear in late 2014.

Shabbos App — main illustration
Shabbos App — illustration

Key takeaways

  • Shabbos App belongs to computer science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Shabbos App to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Shabbos App from memory before moving on to harder problems.

Reference excerpt

The Shabbos App claimed to be a proposed Android app to enable Orthodox Jews, and Jewish Sabbath-observers, to use a smartphone on the Sabbath. The app was supposed to appear in late 2014. Some argued from the outset that this project was nothing more than an elaborate hoax or prank.

Development A team of ten software developers at YidTec, Inc., including Yossi Goldstein, Yitz Appel, Yehuda Levi, and other programmers, were working on the app. On October 22, 2014, its developers stated on the Shabbos App website that they were planning to release the app with full functionality on December 1, 2014, on Google Play. In this announcement, the developers also stated that the application is legitimate and not a hoax or a joke. The developers announced on November 16 that they were running behind schedule.

Purpose and function Under Jewish law, as interpreted by mainstream Orthodox Jewish rabbis, Jews are not allowed to work on the Sabbath, which is a day of rest, and Orthodox Jews do not turn electricity on or off on the Sabbath. An exception to these prohibitions is those situations that involve saving lives. The developers said that the Shabbos App was built in a manner that avoids and resolves the Jewish law problems related to using a smartphone by texting on the Sabbath, allowing observant Jews to text on the Sabbath. They also said the screen stays lit for the entire day, texts can be automatically deleted, and an indicator lights green when plugging in the phone will not immediately trigger charging it.

Controversy The app was controversial in some Orthodox Jewish circles.

Rabbi Moshe Elefant of the Orthodox Union and Rabbi Yair Hoffman both spoke out against the app. The Orthodox Union ran two opinion pieces against the app as well as another piece by Rabbi Ari Kahn which was also run by Aish.com. Rabbi Dr. Raphael Zarum, Dean of the London School of Jewish Studies wrote that the Shabbos App developers: "have found solutions to the halachic challenges of typing-writing, screen illumination, sound generation and battery drainage and charging.... I have no doubt that all major halachic authorities will come out against this, except for use in emergency situations. However, the real issue will be how many people, despite their rabbis, will download this new app, open it weekly and feel a bit less guilty about their Shabbat phone habits." Elie Klein said the Jewish community should use the app's introduction as an opportunity to examine how the meaning of Shabbat is being communicated to the next generation. Another commentator focused on the benefit of just disconnecting for a few hours, rather than using the app. Rabbi Yaakov Menken wrote in early October 2014 that while it was true the Shabbos App had attracted a great deal of attention and discussion, he was pretty sure the app is a hoax, "designed to make Orthodox Jews look bad by demonstrating their focus on … what, precisely, I’m not sure ..." intended to "mock attempts by serious, committed Jews to face the new challenges presented by modern technology". According to one of the developers, several rabbis are on board with the project whom the developer described in September 2014 as "Orthodox and knowledgeable in Torah and halacha", though he declined to name them. Rabbi Steve Bar-Yaakov Gindi, a long-time rabbi who received ordination from the Chief Rabbinate of Israel and administers a Jewish educational website, notes that laws for observing the Jewish Sabbath have changed slightly over time to accommodate technological developments. He noted: "Today, there are security cameras everywhere, and no rabbis forbid walking in front of them. That is a good example of how halacha has adjusted, in a perfectly legitimate way, to answer the needs of society using a new technology. To my mind, this is very similar." Others explain that there is specific halachic leniencies that are applicable in such a scenario (ccvc cameras), in most instances, and are not at all a product of 'adjustment to the times'. Facebook pages were created both in favor of and against the app. Jewish Business News listed it as # 2 in its article "Top 20 Tech Stories of 2014 With Jews in Them".

See also

Activities prohibited on Shabbat Electricity on Shabbat § Computers and similar appliances Rabbinically prohibited activities of Shabbat Shomer Shabbat

References

Further reading Sugar, Julie (October 6, 2014). "In Defense of the Shabbos App". The Jewish Daily Forward. Archived from the original on November 8, 2014. Retrieved October 29, 2014. Lisa Spear (October 17, 2014) "Shabbos App: Jewish World Debates Smartphone Application" Archived November 3, 2014, at the Wayback Machine. Global City. Retrieved November 3, 2014. Aharon E. Wexler (October 30, 2014). "Just A Thought: On the Shabbos App". The Jerusalem Post. Retrieved November 2, 2014. Goldenberg, Anna (January 2, 2015). "Ditch Your iPhone and Learn To Listen; What the 'Shabbos App' Can Teach Non-Observant Millennial". The Jewish Daily Forward. Retrieved January 6, 2015.

External links Official website, archived from the original 2015-09-20 "The Shabbos App", The Jewish Press, cartoon by Asher Schwartz, October 27, 2014 "The Shabbos App Tragic Commentary", by Rabbi Eliyahu Fink, Fink-or-Swim, October 2, 2014 "The Shabbos App (Yes it is Real)", by Rabbi Eliyahu Fink, Fink-or-Swim, October 1, 2014 "The Shabbos App", by Rabbi Yair Spitz

Illustrations

Shabbos App illustration

Worked examples

Example 1 — a first encounter with Shabbos App

Start with the simplest possible case. Write down what Shabbos App claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Shabbos App before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Shabbos App ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Shabbos App

In research
Shabbos App appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Shabbos App in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Shabbos App is common in secondary-school and first-year university syllabi. It links to neighbouring topics Android (operating system) software, Judaism-related controversies, Judaism software, so understanding it makes those chapters shorter.
In everyday life
Look for Shabbos App outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Shabbos App in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Shabbos App means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Shabbos App out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Shabbos App in simple terms?

The Shabbos App claimed to be a proposed Android app to enable Orthodox Jews, and Jewish Sabbath-observers, to use a smartphone on the Sabbath. The app was supposed to appear in late 2014.

Why does Shabbos App matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Shabbos App?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Shabbos App.

Tags

  • Android (operating system) software
  • Judaism-related controversies
  • Judaism software
  • Laws of Shabbat
  • Mobile software
  • Shabbat innovations

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