iOS application put unnecessary burden on battery of iPhone. Optimizing it for minimum burden on device battery life is necessary for smooth user experience

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 battery’s 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 Setting>Music 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
Setting>Privacy>Location Services and turn off
any app that you don’t 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
Setting>Privacy>Location
Services>SystemServices

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 Settings>General>Accessibility and turn on
the Reduce motion. Now go to
Settings>Wallpapers & Brightness> Choose
Wallpaper and select some static wallpaper

6. Turn Off Unnecessary Animations
Parallax effect and Dynamic Wallpapers are
animated using information via iPhone’s
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
discoverCharacteristics:forService: methods of the
CBPeripheral class

11. 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:@[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:@[firstCharacteristicUUID,
secondCharacteristicUUID]
forService:interestingService]];
SWIFT
// Look for characterstics matching a specific set of UUIDs for a given service
peripheral.discoverCharacteristics([firstCharacteristicUUID,
secondCharacteristicUUID], forService: interestingService)

13. Disconnect from the Device When You Don't Need
It
To avoid your app from meaninglessly using the device’s 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
setNotifyValue:forCharacteristic: method of the CBPeripheral class. Now
disconnect from the device by calling the cancelPeripheralConnection: method of
the CBCentralManager class

14. Disconnect from the Device When You Don't Need
OBJECTIVE - C
// Unsubscribe from a characteristic value
[self.peripheral setNotifyValue:NO forCharacteristic:interestingCharacteristic];
// 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(peripheral)

15. Multiple factors affect the amount of energy required to do the
network operations on a device.
1. Cellular network activity requires much more energy than performing an
activity over Wi-Fi.
2. Poor or fluctuation in signal conditions may result in slow or problematic
transactions, which must be avoided.
3. Low network throughput (bandwidth) means radios need to stay more than
usual for performing the transactions.
4. 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.
1. Avoid using opacity especially for the content that changes
frequently.
2. Prefer only recommended frameworks while developing
games. These frameworks are optimized to provide good
performance.