iOS users seeking ham licensing: study with app
Amateur Radio Exam Prep: Technician by Patrick J Maloney LLC
https://appsto.re/us/ieMWr.i
Then get the Baofeng UV5RA Ham Two Way Radio from Amazon for $30.
Easy start.
We sometimes travel to and through isolated locations in western states in our motor home. I carry a mobile mounted and a handheld dual band radio (2 meters and 440 mhz.) The mobile can operate on a transmitting power range of 5, 25, or 50 watts. And with the short antenna on the motorhome roof up about 12 feet above the ground, its often even easy to reach regional repeaters in the area with as little as one watt output on the handheld( walkie talkie.)
Cell phone towers are sometimes non existent to iffy in some areas. There are thousands of VHF and UHF repeaters across the country. These operate on the same principle of cell phone towers, except they rebroadcast ham radio transmissions on ham band frequencies. In addition to talking to other hams as we travel, its nice to know that communication is generally available for emergencies in many areas where you will have no bars showing on your cellphone.