How to check which iPhone apps use the most battery
iPhone does not include an app called Activity Monitor in the same way a Mac does. Instead, iOS provides a detailed battery report inside the Settings app. It shows which apps and system activities have consumed the most power, when that usage happened, and whether the display or background activity was involved.
This information is useful when your iPhone suddenly needs charging before the end of the day. A social media app may be refreshing in the background, a navigation app may be using location services, or a poor mobile signal may be making the phone work harder than usual. Checking the battery report can help separate a genuine battery problem from normal heavy use.
The menu names are broadly the same in Australia, whether your iPhone is connected to Telstra, Optus, Vodafone, or another provider. Some labels can vary slightly with the iOS version and iPhone model, so the important feature to look for is the Battery section in Settings.
Find the battery usage report
Open Settings, scroll down, and tap Battery. You should see a battery level graph near the top of the screen, followed by information about activity and battery usage. Depending on your iOS version, the page may show separate sections for battery usage by app and activity over time.
The graph displays your iPhone’s battery level across the selected period. It can show when the battery went down, when the phone was charged, and when the screen was active. Tap a section of the graph to examine a particular time, such as the morning commute or the previous evening.
Under the graph, choose Last 24 Hours or Last 10 Days when those options are available. The 24-hour view is best for investigating a sudden drain. The 10-day view is more helpful for identifying a repeated pattern, such as an app that consumes a large amount of power every day.
Scroll down to the list of apps. iOS ranks them by the share of battery usage during the selected period. Tap Show Activity if that option appears. This changes the display from battery percentage to the amount of time each app was active, including time on screen and time running in the background.
Understand what the percentages mean
The percentage beside an app represents its share of the battery used during the selected period. It does not mean that the app has permanently used that exact percentage of your iPhone’s full battery capacity.
For example, if your phone used 40 per cent of its charge during the day and Instagram accounts for 25 per cent of the listed usage, that generally means Instagram contributed roughly a quarter of the battery consumed in that period. It does not necessarily mean Instagram alone drained 25 per cent from 100 to zero.
The list may include apps you have opened frequently, such as YouTube, TikTok, Maps, Safari, Photos, or games. A demanding game can use a lot of power because it keeps the processor and graphics hardware busy. Video streaming can have a similar effect, particularly when using mobile data rather than Wi-Fi.
The report can also show Home & Lock Screen, No Cell Coverage, Phone, Mail, or other system activities. These are not ordinary apps, but they can explain a significant battery drop. “No Cell Coverage” is especially important in rural areas, underground car parks, and remote roads where the iPhone repeatedly searches for a usable signal.
A high percentage is not automatically a fault. An app used for two hours of navigation or video may reasonably appear near the top. The more useful question is whether the amount of battery usage seems reasonable for the time and type of activity shown.
Read screen and background activity
Tap an app in the battery list to see more detail. iOS may show On Screen, Background Activity, Audio, Cellular Coverage, or other categories, depending on what the app has been doing. These labels explain why an app used power rather than simply showing its name.
On Screen means the app was open and visible. A high figure is expected for games, streaming services, video calls, and navigation. If Maps shows several hours of on-screen activity after a long drive from Sydney to the Blue Mountains, its battery use is probably normal.
Background Activity means the app performed work while you were using another app or while the screen was off. Examples include checking for new messages, synchronising files, refreshing feeds, uploading photos, tracking movement, or updating a widget. Occasional background use is normal, but constant activity from an app you rarely use deserves attention.
Audio can appear when an app plays music, podcasts, or other sound while the screen is locked. Cellular Coverage may appear when an app’s activity happened while the phone was connected through mobile data. Streaming a radio station on a train between Melbourne suburbs, for example, may use more energy than playing downloaded audio over Wi-Fi or from local storage.
The activity view can reveal a mismatch between your habits and the battery drain. If an app shows very little screen time but substantial background activity, review its permissions and refresh settings. If the screen time is high, reducing use, brightness, or video quality may make a larger difference than closing the app.
Investigate unusual battery drain
Start by checking whether the battery drop happened during a period of active use. A phone used for hotspot sharing, FaceTime, gaming, navigation, or camera recording will naturally consume more power. The battery report is most useful when you compare usage with what you were actually doing.
A weak signal can be easy to overlook. iPhones use additional power when they search for a mobile network or switch repeatedly between connection types. This may happen in regional Queensland, along parts of the Nullarbor, or inside buildings with poor reception. If “No Cell Coverage” appears prominently, try Airplane Mode in areas where you do not need calls or mobile data, or connect to reliable Wi-Fi where available.
Heat can also affect battery performance. A phone left in direct sun at a beach, on a dashboard during an Adelaide summer, or inside a hot car may drain faster and temporarily limit charging. Remove a thick case during heavy charging if the device becomes unusually warm, and keep it out of direct sunlight.
Check for an app update and an iOS update if one application repeatedly shows excessive background use. Developers sometimes fix battery bugs through updates. If the issue began immediately after installing a new app, remove it temporarily and compare the battery behaviour over the next day.
You can also review Settings > General > Background App Refresh. Turning it off for apps that do not need frequent updates can reduce background work. Under Settings > Privacy & Security > Location Services, review which apps can access your location. Select Never, Ask Next Time Or When I Share, or While Using the App where appropriate, rather than allowing constant access without a clear reason.
Use the report to improve battery life
The battery screen should guide practical changes rather than encourage you to force-close every app. iOS manages suspended apps efficiently, and repeatedly swiping apps away from the app switcher can sometimes make them use more energy when they reload. Close an app when it is frozen, misbehaving, or using a feature continuously—not simply because it appears in the app switcher.
Reduce the settings that match the cause of the drain. If the display dominates usage, lower brightness, enable Auto-Brightness, reduce video quality, or use Low Power Mode. If background activity is responsible, adjust Background App Refresh, mail fetching, notifications, or location access. If mobile coverage is the issue, use Wi-Fi or Airplane Mode when practical.
Low Power Mode is available through Settings > Battery, and you can add it to Control Centre for quicker access. It reduces or pauses some background tasks, automatic downloads, visual effects, email fetching, and other activity. It is useful on a long day away from a charger, such as travelling through regional Victoria or spending hours at a sporting event.
Also check Settings > Battery > Battery Health & Charging. Maximum Capacity gives an estimate of the battery’s capacity compared with when it was new. Peak Performance Capability can indicate whether iOS has detected a battery-related performance issue. A worn battery can make normal app usage feel excessive, so app statistics should be considered alongside battery health.
A simple test can make the results easier to interpret. Record the battery level, note the apps you expect to use, and check the report again after several hours. Compare a day on Wi-Fi with a day relying heavily on mobile data. This is more reliable than judging battery life from one short session, especially when travel, temperature, reception, and screen brightness vary.
| What you see in Battery settings | What it usually indicates | Practical response |
|---|---|---|
| High On Screen time | You actively used the app for a long period | Reduce screen time, brightness, streaming quality, or gaming intensity |
| High Background Activity | The app worked while you used other apps or the screen was locked | Review Background App Refresh, notifications, syncing, and permissions |
| High Cellular Coverage activity | Mobile data or an unstable connection contributed to drain | Use Wi-Fi where possible and check reception in the area |
| No Cell Coverage | The iPhone spent energy searching for a network | Use Airplane Mode when coverage is unavailable or unnecessary |
| Home & Lock Screen near the top | Frequent screen wake-ups or notifications | Reduce notifications, widgets, Raise to Wake, or Always-On Display use |
| Battery Health shows reduced capacity | The physical battery may hold less charge than when new | Compare real-world runtime and consider Apple battery service if needed |
Use the Battery screen as your iPhone’s built-in activity monitor whenever you need to find an energy drain. Check the time period, compare app usage with your actual behaviour, and look for background work, weak reception, or battery health issues before blaming a single app. Save these steps for the next time your iPhone struggles through the day, and share the guide with anyone trying to track down unexpected battery use.