Settings

There two types of Settings in Luach.

Halachic Settings 

Your location
Luach uses your location to determine what time sunset and sunrise are at your location. This is necessary in order to know what the current Jewish Date is.
It also is used to display the correct Zmanim on the Zmanim Screen.
If your location is in Israel, the Yomim Tovim, Sedra of the week, and Candle Lighting times will be in accordance to the Minhag in Eretz Yisroel.
NOTE: Luach remembers your location - and all other settings, even when you close your phone. This information is stored locally. Luach does not send out any information whatsoever.
As a matter of fact, the Luach Application does not have any Internet permissions on your device, and is therefore physically unable to connect to a remote server.
Flag previous Onah (The "Ohr Zaruah")
On Flagged Dates, besides for the actual Onah that needs to be observed, many people also observe the previous Onah as well.
This is in accordance with the opinion of the Ohr Zarua.
Note, the restrictions will usually be greatly reduced during the Onah of the Ohr Zarua.
If you are unsure about if or how to observe the Ohr Zarua, please consult with your Rav.
If this setting is turned on, Luach will flag the previous Onah with an indication this it is for the Ohr Zarua. Due to it's widespread prevalence, this Setting is turned on by default.
Keep Onah Beinonis for a full 24 Hours
On the Onah Beinonis Flagged Dates of Yom Hachodesh, 30 days and 31 days, there are many that do not only observe the Onah in which the period began, they observe the entire 24 hour period.
This is NOT the same as the Ohr Zarua - the previous Onah. The Ohr Zarua is the Onah that precedes the one of the Flagged date, while this opinion holds that a single entire day needs to be observed, from sunset to sunset.
For example, if the Flagged Date requires observance of the Night Onah, the Ohr Zarua will be for the Day Onah preceding it, but for this opinion, the following Day Onah will need to be observed as well, as it is part of the same Jewish Date as the Night Onah. In Luach, this setting is off by default but it is very important to note that most Rabbinic authorities advise to observe this opinion.
Keep day Thirty One for Onah Beinonis
This Setting pertains to the Flagged Dates that are generated by each Entry for someone that does not have an active Vesset Kavuah.
The Flagged Dates that are always generated are the 30th day after the period began, the Yom Hachodesh, and the Yom Haflaga.
Most Rabbinic authorities advise to also observe the thirty-first day from the start of the period. It is interesting to note that if the Jewish month in which the period occured was a full month of 30 days (about half the Jewish months), it will not matter whether or not one is observing the 31st day, as the 31st day will the same day as the Yom Hachodesh. Due to this settings very widespread prevalence, in Luach, this setting is on by default.
Haflaga is only canceled by a longer one
This Setting pertains to the Flagged Dates that are generated by each Entry for someone that does not have an active Vesset Kavuah.
These Flagged Dates are: the 30th and 31st days after the period began, the Yom Hachodesh, and the Yom Haflaga.
The question arises what happens when there was another Entry in the interim between the period in question and the Flagged Date.
For example, if there was an Entry on the 1st of the month with a Haflaga of 35 and then another one on the 20th of the month with a Haflaga of 20, it is generally agreed that the following 1st of the month should be observed as the Yom Hachodesh.
But does the 30th, 31st and 35th days from previous Entry still get flagged?
The Ta"z and the Shulchan Aruch Harav both are of the opinion that the 30th, 31st and 35th days from the previous Entry still are observed as the interim periods Haflaga was shorter than 30, 31 and 35.
There are many who disagree (mainly the Sha"ch) and hold that each new period cancels the Haflagas of all previous periods even if the new periods Haflaga was shorter. It is important to note that according to the stricter opinion, there can in fact be multiple periods that their Haflagas were never canceled by a longer Haflaga. For example, if there were periods with the Haflagas of 36, 35, 33, 32, the days that will need to be observed for this last period of 32 will be, 30, 31, 32, 33, 35, 36.
In the above scenario, if the following period had a Haflaga of 37, only 30, 31 and 37 will need to be observed as all the others were canceled by the longer Haflaga. In Luach, this setting is off by default.
Continue incrementing Dilug Yom Hachodesh Kavuahs into another month
This setting pertains to the Flagged Dates generated from Kavuahs of Dilug Yom Hachodesh.
As these types of Kavuahs add or remove days for each subsequent month, they eventually reach either the end or the beginning of the month - dependent upon whether the Dilug pattern was incrementing or decrementing days.
The question then arises, do we assume that the pattern will "spill over" into the next or the previous month?
The Chazon Ish zt"l" was of the opinion that once a pattern of Yom Hachodesh reaches the end or beginning of the month, the pattern is no longer applicable and the Kavuah can be removed.
Others argue and hold that the pattern spills over into the next or previous month. In Luach, the default goes with the opinion of the Chazon Ish and once the Kavuah reaches the end or beginning of the month it will no longer generate any Flagged Dates.
Calculate Haflagas by counting Onahs 
This setting determines whether or not Luach will calculate Haflagas by counting Onahs.
This setting is in accordance with the opinion of the Shulchan Aruch Harav.
Many authorities disagree with this interpetation of how to calculate Haflagas (notably, The Nodah B'Yehuda.)
If this setting is turned on, in addition to the regular Haflaga calculation, Luach will also calculate an additional Flagged Date by counting the Onahs between a period and the one preceding it, and add that number of Onahs to the period, and Flag the result as a Haflaga of Onahs.
In addition, Luach will suggest the Kavuah of Haflaga of Onahs as a possible Kavuah.
This Kavuah is set by three periods in a row that started the same number of Onahs after the period that preceded them.
This pattern is considered a Kavuah in the opinion of the Shulchan Aruch Harav and many authorities do not consider this pattern to be a Kavuah unless the Onahs are the same for all the Entries; in which case it will be considered a Haflaga Kavuah. This setting is turned off by default.
Flag Kavuahs even if not all the same Onah
This setting determines whether or not Luach will suggest a Kavuah for a pattern of Entries where all the Entries did not begin in the same Onah.
This pattern is considered a Kavuah in the opinion of the Harav Moshe Feinstein zt"l and many authorities do not consider this pattern to be a Kavuah. This setting is turned off by default.

Application Settings 

Automatically Calculate Kavuahs upon addition of an Entry
Whenever a new Entry is added or an existing is edited, Luach looks over the list of Entries to see if there is a new Kavuah pattern.
Turn this setting off if you don't want Luach to do this.
You can still search for new Kavuah patterns by pressing on the Calculate Kavuahs button from the Entries List Screen.
Number of Months ahead to warn
The number of months ahead to calculate Flagged Dates of Kavuahs.
It is important to note that this option is not applicable for the Flagged Dates of Onah Beinonis or those Kavuahs that rely on the interval between Entries, such as the Haflaga Kavuah.
Show Entry, Hefsek Tahara and Mikva information
For a date that has an Entry, Luach shows a red label on the Main Screen with basic information about the Entry and the background color on the Main Screen and the Month View Screen is light red.
The Main Screen also shows the following information:
  • The number of days since the last Entry
  • An indictaion that a Hefsek Tahara may be possible on this day
  • An indication that a Hefsek Tahara was done on this day
  • An indication that there was a Shaila on this day
  • An indictaion that going to the Mikvah may be possible after nightfall
  • An indictaion that this was a Mikvah night
Turning this setting off will prevent Luach from showing any of the above.
The option to add a Hefsek Tahara, Shaila or Mikvah indication badge will also be hidden from each day on the Main Screen. This option is given for those that wish to prevent anyone who casually opens the Luach Application on your device from accessing all this very personal information at the first glance.
Turning this setting off will basically cause Luach to give the outward impression of a regular calendar app. Note, that this will not fully prevent anyone from viewing this information by pressing any of the menu buttons on the left.
If you want to really protect your private information, set the Require PIN setting (see below). Also note that if you chose to turn off this setting and to hide your information, the information is NOT deleted.
If you turn this settinf back on, all the previously entered information will show again.
Show flags for problem dates on Main Screen
On the Main Screen, Luach shows a red flag as an indication for dates that are Flagged Dates.
The background colors of these dates on the Main Screen and the Month View Screen is changed to yellow.

Set this option to off if you wish to prevent anyone who casually opens the Luach Application on your device from seeing your personal information at the first glance.
Note, that this will not fully prevent anyone from viewing this information by pressing any of the buttons on the right.
If you want to really protect your private information, set the Require PIN setting (see below).
Calendar displays current
This setting determines if the Jewish month or the secular month is first shown when the Month View Screen is opened.
In either case, you can view the other month type by pressing the button on the top left.
Show explicitly ignored Kavuahs in the Kavuah list
This setting pertains to Ignored Kavuahs.
By default these Kavuahs are not show on the Kavuah List Screen.
Turn on this setting if you wish to view these Kavuahs.
You can also turn on this setting, by pressing on the "Show Ignored Kavuahs" button on the Kavuah List Screen.
Don't show Flagged dates for a week after Entry
This setting determines whether or not to show Flagged Dates within the first week after an Entry. The reason for hiding Flagged Dates during this time period, is to prevent clogging up the calendar with Flagged Dates that are irrelevant, as this time period (and more) is where the strictest of Niddah restriction apply in any case. This setting is turned on by default.
Hide Help Button
In all Luach screens, there is a Help Button on the bottom left.
Pressing it brings up the Luach Help Documentation. You are probably reading this after pressing the Help Button...
If you wish to hide the Help Button, turn this setting off.
You will still be able to open the Help Documentation by pressing on the Help icon on the top of the Settings Screen. By deafult, Luach does not hide the Help Button.
Require PIN to open application
To protect your personal information, you can require a password any time the Luach application is opened or activated.
4 digit PIN Number
This is the 4 digit password that will be required if the Require PIN to open application setting is on.
Warning, DO NOT FORGET THIS PIN NUMBER.
If you forget the PIN number, there is nothing that can be done.
You will need to uninstall Luach and then reinstall it again, and all your information will be lost.

Export your Settings

You can save your list of Settings outside of Luach by exporting the list.
To do this, press on the Export Data button which is found at the top right of the Settings Screen.
You will shown the Export Data Screen with the Settings option selected.
On the Export Data Screen when you click the "Export to Email" button, your default email client will open up in "compose" mode, with an email containing all of your Settings.
In addition, a spreadsheet containing all of your Settings will be attached to the email.
It is advisable to send the email to yourself and to keep it as a backup of your data. NOTE: It is not (yet) possible to IMPORT data into Luach.
If you need to restore your data, it will need to be done manually.
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