Apple IPhone IOS 42 And 43 User Guide

							Clock
18
World Clocks
You can add clocks to show the time in other major cities and time zones around  
the world.
View clocks:   Tap World Clock.
If the clock face is white, it’s daytime in that city. If the clock face is black, it’s nighttime. 
If you have more than four clocks, flick to scroll through them.
Add a clock:   
 1 Tap World Clock.
 2 Tap , then type the name of a city.
Cities matching what you’ve typed appear below.
 3 Tap a city to add a clock for that city.
If you don’t see the city you’re looking for, try a major city in the same time zone.
Delete a clock:   Tap World Clock and tap Edit. Then tap  next to a clock and tap Delete.
Rearrange clocks:   Tap World Clock and tap Edit. Then drag  next to a clock to a  
new place in the list.
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							Alarms
You can set multiple alarms. Set each alarm to repeat on days you specify, or to sound 
only once.
Set an alarm:  
 1 Tap Alarm and tap .
 2 Adjust any of the following settings:
 ÂTo set the alarm to repeat on certain days, tap Repeat and choose the days.
 ÂTo choose the ringtone that sounds when the alarm goes off, tap Sound.
 ÂTo set whether the alarm gives you the option to hit snooze, turn Snooze on or off.  
If Snooze is on and you tap Snooze when the alarm sounds, the alarm stops and 
then sounds again in ten minutes.
 ÂTo give the alarm a description, tap Label. iPhone displays the label when the  
alarm sounds.
If at least one alarm is set and turned on, 
 appears in the iPhone status bar at the top 
of the screen.
Important:   Some carriers don’t support network time in all locations. If you’re 
traveling, iPhone alerts may not sound at the correct local time. See “ Date and Time
” on 
page 198.
Turn an alarm on or off:   Tap Alarm and turn any alarm on or off. If an alarm is turned 
off, it won’t sound again unless you turn it back on.
If an alarm is set to sound only once, it turns off automatically after it sounds. You can 
turn it on again to reenable it.
Change settings for an alarm:   Tap Alarm and tap Edit, then tap  next to the alarm 
you want to change.
Delete an alarm:  Tap Alarm and tap Edit, then tap  next to the alarm and tap Delete.
15 2Chapter 18    Clock 
						

							Stopwatch
Use the stopwatch to time an event:  
 1 Tap Stopwatch.
 2 Tap Start to start the stopwatch.
 ÂTo record lap times, tap Lap after each lap.
 ÂTo pause the stopwatch, tap Stop. Tap Start to resume.
 ÂTo reset the stopwatch, tap Reset when the stopwatch is paused.
If you start the stopwatch and switch to another app, the stopwatch keeps running.
Timer
Set the timer:   Tap Timer, then flick to set the number of hours and minutes. Tap Start 
to start the timer.
Choose the sound:   Tap When Timer Ends.
Set a sleep timer:  Set the timer, then tap When Timer Ends and choose Sleep iPod.
When you set a sleep timer, iPhone stops playing music or video when the timer ends.
If you start the timer and then switch to another iPhone app, the timer keeps running.
15 3Chapter 18    Clock 
						

							Calculator
19
Using the Calculator
Tap numbers and functions in Calculator just as you would with a standard calculator. 
When you tap the add, subtract, multiply, or divide button, a white ring appears 
around the button to let you know the operation to be carried out. Rotate iPhone to 
get an expanded scientific calculator.
Standard Memory Functions
 ÂC:  Tap to clear the displayed number.
 ÂMC:   Tap to clear the memory.
 ÂM+:   Tap to add the displayed number to the number in memory. If no number is in 
memory, tap to store the displayed number in memory.
 ÂM–:   Tap to subtract the displayed number from the number in memory.
 ÂMR:   Tap to replace the displayed number with the number in memory. If the button 
has a white ring around it, there is a number stored in memory.
The stored number remains in memory when you switch between the standard and 
scientific calculators.
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							Scientific Calculator Keys
Rotate iPhone to landscape orientation to display the scientific calculator.
2ndChanges the trigonometric buttons (sin, cos, tan, sinh, cosh, and tanh) to their inverse 
functions (sin-1, cos-1, tan-1, sinh-1, cosh-1, and tanh-1). It also changes ln to log2, and ex to 
2x. Tap 2nd again to return the buttons to their original functions.
( Opens a parenthetical expression. Expressions can be nested.
) Closes a parenthetical expression.
% Calculates percentages, adds markups, and subtracts discounts. To calculate a 
percentage, use it with the multiplication (x) key. For example, to calculate 8% of 500, 
enter 
500 x 8 % = 
which returns 40.
To add a markup or subtract a discount, use it with the plus (+) or minus (–) key. For 
example, to compute the total cost of a $500 item with an 8% sales tax, enter 
500 + 8 % = 
which returns 540.
1/x Returns the reciprocal of a value in decimal format.
x
2Squares a value.
x
3Cubes a value.
y
xTap between values to raise the first value to the power of the second value. For 
example, to compute 34, enter 
3 yx 4 = 
which returns 81.
x! Calculates the factorial of a value.
√ Calculates the square root of a value.
x√yUse between values to calculate the x root of y. For example to compute 4√81, enter 
81 x√y 4 = 
which returns 3.
15 5
Chapter 19    Calculator 
						

							logReturns the log base 10 of a value.
sin Calculates the sine of a value.
sin
-1Calculates the arc sine of a value. (Available when the 2nd button is tapped.)
cos Calculates the cosine of a value.
cos
-1Calculates the arc cosine of a value. (Available when the 2nd button is tapped.)
tan Calculates the tangent of a value.
tan
-1Calculates the arc tangent of a value. (Available when the 2nd button is tapped.)
ln Calculates the natural log of a value.
log2 Calculates the log base 2. (Available when the 2nd button is tapped.)
sinh Calculates the hyperbolic sine of a value.
sinh
-1Calculates the inverse hyperbolic sine of a value. (Available when the 2nd button  
is tapped.)
cosh Calculates the hyperbolic cosine of a value.
cosh
-1Calculates the inverse hyperbolic cosine of a value. (Available when the 2nd button   
is tapped.)
tanh Calculates the hyperbolic tangent of a value.
tanh
-1Calculates the inverse hyperbolic tangent of a value. (Available when the 2nd button   
is tapped.)
e
xTap after entering a value to raise the constant “e” (2.718281828459045…) to the power 
of that value.
2
xCalculates 2 to the power of the displayed value. For example, 10 2x = 1024. (Available 
when the 2nd button is tapped.)
Rad Changes the mode to express trigonometric functions in radians.
Deg Changes the mode to express trigonometric functions in degrees.
π Enters the value of π (3.141592653589793…).
EE An operator that multiplies the currently displayed value by 10 to the power of the next 
value you enter.
Rand Returns a random number between 0 and 1.
15 6
Chapter 19    Calculator 
						

							Compass
20
Getting Compass Readings
The built-in compass shows which direction you’re facing, along with the geographical 
coordinates of your current location. You can choose magnetic north, or have Compass 
adjust the declination to show true north.
Important:  The accuracy of the digital compass may be negatively affected by 
magnetic or other environmental interference, including interference caused by the 
close proximity of the magnets contained in the iPhone earbuds. The digital compass 
should be used only for basic navigation assistance and should not be solely relied on 
to determine precise locations, proximity, distance, or direction.
You need to calibrate the compass the first time you use it, and you may need to 
recalibrate it occasionally after that. iPhone alerts you if calibration is needed.
Note:   If location services is turned off when you open Compass, you may be asked to 
turn it on. You can use Compass without turning on location services. See “ Location 
Services
”  on page 19 4 .
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							Calibrate iPhone:  Wave iPhone in a figure eight. You may be asked to move away 
from a source of interference.
See the direction you’re facing:   Hold iPhone level to the ground. The compass needle 
rotates to point north. Your current direction appears at the top of the screen. The 
coordinates of your current location are displayed at the bottom of the screen.
Switch between true north and magnetic north:   Tap  and tap the setting you want.
Compass and Maps
The Compass app lets you find your current location in Maps. Maps also uses the built-
in compass to show the direction you’re facing.
See your current location in Maps:  Tap  at the bottom of the Compass screen. Maps 
opens and shows your current location with a blue marker.
15 8Chapter 20    Compass 
						

							Show the direction you’re facing:  In Maps, tap  twice. The icon changes to . The 
angle shows the accuracy of the compass reading—the smaller the angle, the greater 
the accuracy.
See “Finding and Viewing Locations” on page 13 8 .
15 9Chapter 20    Compass 
						

							Voice Memos
21
Recording Voice Memos
Voice Memos lets you use iPhone as a portable recording device using the built-in 
microphone, iPhone or Bluetooth headset mic, or supported external microphone.
Note:  External microphones must be designed to work with the iPhone headset jack 
or Dock Connector. These include Apple-branded earbuds and authorized third-party 
accessories marked with the Apple “Made for iPhone” or “Works with iPhone” logo.
You can adjust the recording level by moving the microphone closer to or further 
away from what you’re recording. For better recording quality, the loudest level on the 
level meter should be between –3dB and 0 dB.
Record button
Audio level meter 
Go to voice memos
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