from Scriptures to keep in a wallet to meditate on while in the shelters: Isaiah 26:20,21. Psalm 91:89. What do these comforts from Scriptures tell you? "Go, My people, enter your rooms, and shut your doors behind you; hide yourself, as it were, for a little while, until the displeasure is overpast. For look, YHWH is coming out of His place to punish the inhabitants of the Earth for their crookedness. And the Earth shall disclose her blood, and no longer cover her slain." (Isaiah 26:20,21) Daniel chapter 12 indicates this will last 45 days. That is the worst of the attacks. The worst will last only 45 days. "Because you have made YHWH My refuge, the Most High your dwelling place, No evil befalls you, And a plague does not come near your tent; For He commands His messengers concerning you, To guard yo uin all your ways." Psalm 91: 9-11. To have such protection requires some obedience and observance of Moses' food laws and the Lords Sabbaths which means do not buy or sell food or wares from sunset Friday to sunset Saturday or work then except to do good or what is needful. Go before the Lord on the Holy Days of Passover, First Fruits, Pentecost, Trumpets, Savuot and Roshashanna and Hanukkah.

Over the next decades hatred of Jews will increase but a grudging respect also .The danger is an unpredicted attack so ultra cautios even paranoid scenarious demand a huge protective and huge Deterrant capacity .

As per several relatives and friends in Israel, these apps don't work a lot of the time.