In today's world, smartphone dependence is undeniable. We use our devices for a variety of daily tasks, from communication to entertainment. However, a constant challenge is keeping the battery charged throughout the day. Therefore, the demand for apps dedicated to monitoring and extending battery life is growing.
Furthermore, a smartphone's battery performance can be affected by several factors, such as apps running in the background, high brightness all day, and a weak network signal. Fortunately, there are options in the store that help you see what's consuming energy and correct habits that shorten battery life.
Before proceeding, a change in expectations and a warning. No app "increases" battery capacity: in modern Android, the system itself controls background consumption. What these tools do well is measure, diagnose, and show where the energy is going. And a warning: several popular battery-saving apps have been removed from Google Play by Google itself, as we explain later. The five options below were checked in the Brazilian store before publication — developer, package, date of last update, and the "Contains ads" and "In-app purchases" labels.
The 5 best apps to improve your phone's battery life.
In search of solutions, many users turn to apps that promise to improve battery efficiency. Those that actually deliver work in two ways: by measuring the actual consumption of each app and each charging cycle, or by revealing data that the system hides, such as estimated battery health and charger speed. From there, the decision of what to turn off remains yours.
1. AccuBattery
O AccuBattery – Battery (com.digibites.accubattery, The app (from Digibites) stands out for its scientific approach. Instead of promising savings with a single tap, it measures how much charge each cycle actually consumes and estimates battery health by comparing current capacity to factory settings. It also shows consumption in milliamps during use and in standby mode, allowing you to discover which app is draining your device while the screen is off.
Another well-known feature is the charging alarm, which notifies you when the battery reaches a certain percentage, for those who prefer not to leave their device plugged in overnight. The store information states: "Contains ads" and "In-app purchases," with items ranging from R$ 1.49 to R$ 33.99. Last updated November 2025, rating 4.8. It is only available for Android — beware of similarly named apps on the App Store, as they are not from Digibites.
2. Battery Guru: Battery Health
O Battery Guru: Battery Health (com.paget96.batteryguru, This app (from developer Paget96) is the most comprehensive on the list in terms of information. It tracks estimated capacity, temperature, voltage, and the history of each charge, separating consumption with the screen on from standby consumption. Over time, it builds a picture of the device's wear and tear.
It also provides charging reminders and tips to reduce wear and tear, such as avoiding leaving the phone always at 100% or very close to zero. The store states: “Contains ads” and “In-app purchases”, from R$ 2.99 to R$ 49.99, updated in July 2026 and rated 4.6. Available only for Android.
3. GSam Battery Monitor
O GSam Battery Monitor (com.gsamlabs.bbm, (from GSam Labs) is a veteran and remains up-to-date. Its distinguishing feature is the detailed information provided by application: in addition to battery percentage, it shows CPU usage, screen time, sensor usage, and so-called wakelocks — requests that prevent your phone from going to sleep. It's the right tool when the battery dies in the middle of the night and you don't know why.
It's also possible to set a reference period and compare different days, as well as receive temperature and battery level alerts. What the store says: the listing states "Contains ads" and doesn't list "In-app purchases"—the extra features are in a separately sold Professional version. Updated January 2026, rated 4.5. Android only.
4. Ampere
O Ampere (com.gombosdev.ampere, This app (from developer Brain_trapp) solves a very practical question: is your charger charging fast or slow? The app measures the charging and discharging current in real time, which is useful for comparing cables, power supplies, and car chargers to find out which set is falling short.
It also displays voltage, temperature, and battery technology, and measures consumption with the screen on and off. The store information states: the listing shows "Contains ads" and "In-app purchases," with a fee of R$ 9.49 per item to remove the advertising. Updated in June 2026, rating 4.6. Only available for Android.
5. Greenify
Greenify (com.oasisfeng.greenify, (from developer Oasis Feng) is the option for those who want to "hibernate" applications that unnecessarily wake up the device. You choose which programs should be frozen when not in use, and it prevents them from running again in the background on their own.
An honest caveat: the gains are greater on older devices and versions of Android. In recent versions, the system automatically restricts almost everything that Greenify was designed to do, and some features require extra configuration. What the store says: the listing doesn't show any ad labels or "In-app purchases" — it's free and ad-free. The last update was in August 2024, making it the oldest on this list, although it remains available on Google Play. Only for Android.
Battery apps that have been removed from the store.
For years, lists like this one started with Battery Doctor (com.ijinshan.kbatterydoctor_en) and DU Battery Saver (com.dianxinos.dxbsNeither of them is on Google Play anymore, just like DU Speed Booster (com.dianxinos.optimizer.duplayClean Master (com.cleanmaster.mguard) and Advanced Mobile Care (com.iobit.mobilecareThe pages on the store returned an error, and the removal was done by Google itself, due to non-compliance with policies — especially ad fraud.
When an app is removed from the store, searches often lead users to websites that distribute the APK file separately. This download bypasses the Play Store's security checks and may deliver a modified version of the program, with injected ads or permissions that the original did not request. This is precisely why these names do not appear in the list above. If any of them are still installed on your phone, uninstall them and stick with one of the five options on this page.
Beyond Applications: Tips and Features
In addition to the apps mentioned, there are several practices that help save battery and often yield better results than any installed program. Reducing screen brightness or setting it to automatic, decreasing the time until the screen turns off, disabling location and Bluetooth when not in use, and keeping the system and apps updated are simple and effective measures.
It's also worth using what comes pre-installed on the device. In Settings, under battery, Android lists usage per app, offers a Battery Saver mode, and allows you to restrict background usage of specific programs. Samsung, Motorola, and Xiaomi devices also have their own maintenance panels. In many cases, this native setting solves the problem without installing anything—and the apps on the list can help you figure out where to look.
FAQ – Frequently Asked Questions
Q: Do battery saver apps really work? A: The good ones work as a diagnostic tool. They show which apps consume the most energy and how healthy the battery is, and it's this information that allows you to take action. Those that promise to "optimize with one tap" deliver little, because Android itself already manages background processes.
Q: Can using these apps extend battery life? A: Indirectly, yes. By monitoring charging cycles and avoiding extremes—not always leaving it at 100% nor always reaching 0%—wear and tear over the years tends to be less. However, the battery's physical capacity does not increase with any application.
Q: Are these apps compatible with all smartphones? A: The five options mentioned here are for Android. iOS doesn't allow third-party apps to manage the system battery, so on the iPhone this control is in the device's own settings, under Battery and Battery Health. Similar names in the App Store are usually from other developers.
Q: Why aren't Battery Doctor and DU Battery Saver on the list? A: Because they were removed from Google Play by Google itself. Listing them today would push the reader towards APK downloads outside the store, which don't pass security checks.
Q: Can an app protect the battery from overcharging? A: No. Overload protection is handled by the device's own circuitry and the charger. What an app does is notify you when the charge reaches the level you've set.
Conclusion
In short, battery apps are worthwhile when viewed as measurement tools, not as magic. AccuBattery and Battery Guru show battery health and wear, GSam Battery Monitor identifies the culprit for nighttime consumption, Ampere reveals if the charger is delivering on its promises, and Greenify even helps with older devices. All were available on the Brazilian Google Play Store when this text was reviewed.
Combining these diagnostics with simple habits — controlled brightness, fewer notifications, background restriction in Android settings — allows you to get much more out of the day with the same battery charge. And, if you come across a recommendation for Battery Doctor or DU Battery Saver, remember: these names are from the app store and should not be installed externally.
