iOS Battery Optimization Best Practice

1
Minimise the Burden on Battery

• iOS Application Battery Optimization Techniques

2
How to Increase an iPhone Battery Usage

• People find battery a serious concern but few iOS
  app designing tips
• and can easily extend the battery usage of an
  iPhone without
• compromising the . Perhaps the most ignored tip
  is keeping your
• iPhone beyond the reach of hot sun or avoid
  leaving it in a hot car.
• Heat shortens the batterys performance
  significantly

3
Turn Down the Volume

• In order to minimize the impact of audio on your
  iphone it is recommended to turn down your volume
  as well as prefer headphones when
• Possible. Go to SettinggtMusic to set a volume
  limit as well as to turn off the EQ in order to
  save even more battery

4
Stop the Location Services

• It is evident that when your iphone is used to
  track location then it drains huge amount of
  battery. You can stop this by going into
  SettinggtPrivacygtLocation Services and turn off
  any app that you dont want should track you.
  Going a step further you can also turn off the
  Frequent Location, Diagnostic and Usage and
  Location-Based iAds by going into
  SettinggtPrivacygtLocation ServicesgtSystemServices

5
Turn Off Unnecessary Animations

• Parallax effect and Dynamic Wallpapers are for
  sure two very attractive thing on your iPhone but
  impact your iPhone Battery very negatively.
• Once you put a pause on these it will surely
  save you substantial amount of battery. To do
  this go to SettingsgtGeneralgtAccessibility and
  turn on the Reduce motion. Now go to
  SettingsgtWallpapers Brightnessgt Choose
  Wallpaper and select some static wallpaper

6
Turn Off Unnecessary Animations

• Parallax effect and Dynamic Wallpapers are
  animated using information via iPhones sensors
  about the way in which you are holding and moving
  the phone hence these effect drain a substantial
  amount of battery

7
Do the Download Beforehand

• There are multiple movie and music streaming
  services where option to download the data for
  offline listening and viewing is available.
  Streaming data using the iPhone data pack will
  put extra burden on the device battery. Now
  downloading ahead of time you want it will enable
  your battery to go further.

8
Smart Prioritization for Remote Notification
Delivery

9
Smart Prioritization for Remote Notification
Delivery

• There are multiple elements contained within the
  remote notifications delivered by the server to
  Apple Notification Service like payload data, an
  expiration date and a priority. Notifications can
  be delivered immediately or can be scheduled for
  an energy-efficient time. Here using two levels
  of push priority you can you can decide which
  notification to be delivered instantaneously or
  need to be sent later.

10
Discover those Services and Characteristics that
You Actually Need

• A peripheral usually has more than enough
  services to perform specific use case in an app.
  It is therefore, recommended to figure out the
  particular services and characteristics required
  by your app. This can be done using particular
  UUIDs to discover services and
  discoverCharacteristicsforService methods of
  the CBPeripheral class

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Discover those Services and Characteristics that
You Actually Need

• Discovering particular services
• OBJECTIVE-C
• // Look for services matching a specific set of
  UUIDs
• peripheral discoverServices_at_firstServiceUUID,
  secondServiceUUID
• SWIFT
• // Look for services matching a specific set of
  UUIDs
• peripheral.discoverServices(firstServiceUUID,
  secondServiceUUID)

12
Discover those Services and Characteristics that
You Actually Need

• Discovering particular service characteristics
• OBJECTIVE-C
• // Look for characterstics matching a specific
  set of UUIDs for a given service
• peripheral discoverCharacteristics_at_firstCharac
  teristicUUID, secondCharacteristicUUID
• forServiceinterestingService
• SWIFT
• // Look for characterstics matching a specific
  set of UUIDs for a given service
• peripheral.discoverCharacteristics(firstCharacter
  isticUUID, secondCharacteristicUUID, forService
  interestingService)

13
Disconnect from the Device When You Don't Need It

• To avoid your app from meaninglessly using the
  devices radio simply disconnect it from a
  peripheral device if some characteristic is no
  longer providing notifications or even if the
  extra data is not required anymore. Cancel every
  notification subscriptions by passing a value of
  NO to the setNotifyValueforCharacteristic
  method of the CBPeripheral class. Now disconnect
  from the device by calling the cancelPeripheralCon
  nection method of the CBCentralManager class

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Disconnect from the Device When You Don't Need

• OBJECTIVE - C
• // Unsubscribe from a characteristic value
• self.peripheral setNotifyValueNO
  forCharacteristicinterestingCharacteristic
• // Disconnect from the device
• self.myCentralManager cancelPeripheralConnection
  peripheral
• SWIFT
• // Unsubscribe from a characteristic value
• self.peripheral.notifyValue(false,
  forCharacteristic interestingCharacteristic)
• // Disconnect from the device
• self.myCentralManager.cancelPeripheralConnection(p
  eripheral)

15
Multiple factors affect the amount of energy
required to do the network operations on a device.

• Cellular network activity requires much more
  energy than performing an activity over Wi-Fi.
• Poor or fluctuation in signal conditions may
  result in slow or problematic transactions, which
  must be avoided.
• Low network throughput (bandwidth) means radios
  need to stay more than usual for performing the
  transactions.
• The geographic location and preferred cellular
  provider can affect the amount of energy
  consumption because signal conditions and
  throughput vary very often.

16
Networking Variable Effect on the Energy
17
Guideline for content refresh optimization

• Try to limit the number of views your app uses.
• Avoid using opacity especially for the content
  that changes frequently.
• Prefer only recommended frameworks while
  developing games. These frameworks are optimized
  to provide good performance.

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