Android remains one of the most customizable mobile operating systems out there, despite Google's recent efforts to rein it in. You don't necessarily have to root your Android device to get it to do something off script, either. The fix you need might be hidden behind a system menu or Developer Options. You can personalize Android to address common frustrations with speed, battery life, privacy, and the interface as a whole. I've compiled ten helpful Android hacks that require no third-party apps, no ADB commands, and no rooting. All you need is the patience to dig through the operating system and tap as required.

Please note that many of these hacks require you to enable Developer Options, Android's hidden menu of settings. To do so, head to the Settings menu, scroll to About phone, then tap Build number. Tap it seven times to unlock developer mode. (You'll see a countdown pop-up if you did it correctly.)

Eliminate battery hogging apps

Have you ever looked at your battery usage stats and wondered what to do about a specific app that's draining your battery? Android needs apps to run in the background, sync with the cloud, and check for updates by default. As it does this, it wakes the device and consumes battery in the background.

Android introduced a battery optimization feature in version 6.0 that's supposed to help with apps that drain too much battery. While it's helped shut down unused apps, it can be either too aggressive or not aggressive enough at identifying bad apps. And while you can force-close an app to kill it when you notice it's causing issues, it will likely start up again the next time you reboot your device.

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You can manually set an app's background privileges to the most restrictive setting without deleting or disabling it. In Settings, under Apps, scroll down and tap to view all your apps in a list. Then, tap App battery usage. Here, you will find details about the last time the app was accessed. Tap on the app to adjust its background usage. You can choose to have it optimized by the Android system or unrestricted—something you might use on a wearable to ensure it works properly, for instance. If you want it restricted completely, use the master switch to toggle off background usage. On Samsung devices, this same option is called "sleeping apps" or "deep sleeping apps."

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Optionally, you can turn to Developer Options to get more robust control over background processes. Head back to Developer Options, then scroll or search for Background process limit, and from here, you can decide how many background apps fire off at a time.

Block ads and trackers without VPN

Even with an ad blocker, background apps can still track your phone use, where you shop, and which ads to show you. You could easily circumvent this by installing a VPN app to route traffic, but that relies on a third party app, and slows down performance. You are better off configuring your phone's Private DNS settings to filter web traffic through a service of your choosing.

Private DNS seals the request your device makes to look up a website's IP address, so your carrier can't see the website you're visiting. Since that browser data stays hidden, third parties don't have the data they need to track your habits and, subsequently, target you with ads.

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Navigate back to the Settings panel and select Network & Internet > Private DNS. Change the setting to Private DNS provider hostname. You will need to find the URL of a filtering service to link here. Options include Ad Guard, Control D, and Mullvad, which is what I use to block ads in Chrome.

Once you save, this will redirect all DNS requests from every app and browser on your Android device through this specific block list. It should help cut down on ads and tracking servers watching you without cutting down on performance or battery life. This is also a great hack if you're a parent and your kid has access to an Android device. Use Private DNS to route them away from unsafe sites and adult content.

Unearth long-lost notifications

Sometimes, we accidentally dismiss a notification on Android. If you're always snoozing and missing out on important pings, you can turn on notification history.

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In Settings, under Notifications, tap to turn on Notification history. Now, when you swipe to dismiss your alerts, you can peek in here to see what you forgot or accidentally swiped away. This feature is also helpful for tracking any apps that might be quietly running in the background.

Maximize (or minimize) screen real estate

I don't know what it is about these latest versions of Android, but the text feels either too small or too big when adjusted with the built-in display size settings. You could go into the Accessibility settings to make the text smaller or larger, though it doesn't affect the rest of the interface much. Or you could deploy Android's display density (DPI) scaling hack.

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This is where the developer options come in handy again. You can use the Smallest Width setting to control the DPI precisely, which scales every interface element up and down. Change the value to a higher number if you want fonts and images to shrink down within the resolution—if it starts in the 400s, for instance, try 500 and work backwards until you like what you see. To make fonts and graphics even larger, start around 300.

Adjust what happens when you plug your device in

When you plug an Android phone into a PC, it defaults to charging the device rather than turning on file transfer. You can change the option from the notification shade, though it adds a few extra steps to something that should be straightforward. Fortunately, you can tweak the USB default behavior to prioritize file transfers when the device is plugged in via USB-C.

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In the Developer Options, look for Default USB configuration. Change the setting to File Transfer/Android Auto. Test it by plugging a USB-C cable into a PC to ensure it defaults to file transfer mode.

Get the best audio quality

When you stream music or podcasts through headphones or another external source, the audio isn't at its best. And while you could adjust the equalizer settings in the app that's streaming media, it won't fix much. Your phone and the audio device default to standard codecs rather than high-fidelity ones, which is why it doesn't sound as crisp and loud as it could.

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You can force Android to use the highest-quality codecs whenever the audio device connects in Developer Options. Search for a Bluetooth audio codec and select the highest-quality option supported by your wireless device. Note that you must be connected to the device when you look for this option, or it will appear grayed out. While you're in the Developer Options, look for Bluetooth Audio Sample Rate and Bits Per Sample. You can adjust these to higher sampling rates if your hardware supports it.

Make Android look smooth

Even on the latest Android flagships, the interface can feel sluggish as you're moving between screens. That's because Android deliberately animates between every swipe and flick. But you can eliminate or shorten these animations to make the interface feel more fluid.

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In Developer Options, look for Window animation scale, Transition animation scale, and Animator duration scale. You can adjust their defaults; the lower the number, the faster the animation. You can also choose to turn the animation off completely if it's just too much.  

Force dark mode

I suffer from migraines, and the brightest background can trigger the pain. I figured out how to force every Android app into dark mode, regardless of whether the developer coded it in.

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First, ensure "Dark Theme" is on in your main display settings. Then, navigate to Developer Options and search for Override force-dark. Toggle it on to save your eyes. This feature is also super helpful if you prefer to stare at the screen at night to read. Note that it may cause some apps not to display text properly, in which case, you might want to reserve this ability for when it's most necessary.

Keep the screen on forever

Sometimes you need the display to stay on without timing out. Most Android devices tap out at 30 minutes. But in the developer settings, there is an option to keep the screen "awake" as long as the device is plugged into a power source. I've had this feature enabled since I started covering Android phones. It's the best way to run benchmarks without being affected by random variables.  

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In Developer Options, search for Stay awake, then switch it on. Note that you will need to turn off the screen when charging the device overnight. Your phone could get hot from being connected and having the screen on for too long.

Get the right device to answer the phone

This has happened to me so many times: my phone rings, I answer it, but the call is routed to my smartwatch instead of my buds. While you could manually go into the phone and select the appropriate Bluetooth device, make it easier on yourself by eliminating the devices that you never want to answer the phone.  

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In the Settings panel, under Bluetooth, select the offending device. The easiest way to keep it from rearing its ugly head is to find the switch that completely disables phone calls. You should see an option for it at the bottom of the device's Bluetooth settings. I've disabled the Pixel Watch 4 from answering any calls because there's no instance I'd ever want to take a call from my watch. It's too public!

I may be home all the time, but I'm enjoying Nest's Gemini-aided summaries, even if they're not always on the mark. The new summaries let me easily glance at a notification to see if it's worth getting up for. They've become a metronome of my day, as I see that the local feral cat is on its rounds of mouse hunting in my backyard. And the daily Home Brief is good at summarizing the relative chaos coming in and out of my house.

I'm not even using the latest Nest hardware. I have a mix of first- and second-generation cameras, including two 2012-era indoor Nest cameras and a blend of 2021-era releases. It's been interesting to see how the Gemini infusion has revived the aging hardware, though it's still far from being the future-facing smart home tech it's been billed it to be—especially at this price. There's still work to be done before it becomes the trustworthy, contextual assistant Google wants it to be. Here's what to expect as Gemini becomes a core part of the Nest camera experience, and what you can do to make it work better for you.

Where Gemini excels with Nest

I've been actively testing Gemini in the new Google Home app since it launched last month. It's available after a significant, years-long overhaul of the app. However, most of the features discussed in this piece are only available with the Advanced tier of the Google Home Premium subscription, which costs $200 per year. That tier unlocks Gemini's Home Brief, the Ask Home video history search, detailed event descriptions and notifications, and 60 days of scrubbable event history. You can choose to pay only for the Google Home Premium Standard plan, which includes 30 days of event history and costs $100 per year, but it does not include the Home Brief and other AI-led features mentioned here.

Gemini's smart home features are an additional cost on top of using the regular Gemini chatbot, unless you pay for the Google One AI Pro tier (so many subscriptions). The summary and search capabilities have been time-savers when they work, though they've yet to justify their cost. Right now, the price is only worth it if you're after the colorful, detailed AI-generated notifications and 60-day event history.

You can ask Gemini to tell you more about the Home Brief and bring up specific events. Credit: Florence Ion/Lifehacker

On both Android and iOS devices, the app has been consolidated into three main tabs: Home, Activity, and Automations. The Gemini summaries live in the Activity tab and are refreshed every morning with the lowdown of the day's prior events. You can filter notifications by device, if you're more interested in what the doorbell camera caught than in the one facing the backyard, or read all the summaries at once.

Summaries are generally a variation of the same thing each time. They're simple and succinct, often reading like dispatches of what's happening rather than alerts that a device has detected motion. Reports read like, "a person and a child walked by the front, followed by another person approaching the door." Package notifications will include whether FedEx or UPS is specifically making the drop, and if it can't figure it out, it simplifies it to "delivery person." In most cases, if it's properly labeled, Gemini will mention the camera that caught the action. "Two different people walked by the Front Door, and a cat was seen walking by the Side Door camera." If it identifies people it knows through Familiar Faces, the Home Brief's summaries can be even more dynamic, bordering on narrative. "Flo was seen interacting with a child, lifting them, and later sitting with them on the couch."

Gemini summaries can be very plain or they can be extremely colorful, like this one. Credit: Florence Ion/Lifehacker

While it can get repetitive reading the same thing over and over again, that familiarity makes it possible to scroll through and find a standout event. Typically, I check the summary before I delve further. If there's something of note—"an unrecognized person approached the porch, looked at the camera, and shined a flashlight before leaving"—I tap on the Gemini icon to start a chat about the day's events. It'll pull up the camera clips associated with the devices I selected to review, along with events from that day, and then I can type or dictate my concerns.

A detailed, Gemini-led notification on the Pixel Watch 4. Credit: Florence Ion/Lifehacker

There's no granular control over the Home Brief in its current implementation and you can't decide whether Gemini flourishes the narrative or keeps it simple. You can ask Gemini to focus on "certain things," broadly speaking, like whether you want it to ignore vehicles or animals. You cannot get more specific than that, like asking for it to hone in on cats over opossums. Push notifications are managed the standard route, through the Google Home app and each individual camera.

Customization for the Home Brief is currently very limited. Credit: Florence Ion/Lifehacker

Gemini has a people problem

While Gemini excels at differentiating an opossum from a cat, and a dog from a raccoon, it's still tripping up on arguably one of the most important recognition tasks and a core part of the paid Google Home Premium features: identifying the humans who actually live here. Gemini isn't always aware of who is at the door or inside the house. It's only named my husband and me twice since I started testing everything. It's been pretty good at pointing out that my kid is a child, though a few times it's identified her as "children," plural, which creeped me out the first time I saw the notification. It's never referred to her by her name, though she's a registered Familiar Face. Even when Gemini does provide detail—"a person departing, followed shortly by a person and a child"—it fails to note that it's the same person walking in and out of the house in succession.

I've read through Reddit threads in the last month complaining of similar woes. A quick look at Google's support pages shows Familiar Faces wasn't always consistent, even before Gemini. We know that AI generally has a history of hallucinations, and there are even instances of Gemini's Nest camera summaries making stuff up. But it's even more obvious now that it's part of a daily summary. And while I appreciate the responsible way the AI generally refers to unknown people as just "persons," Gemini's failure to signal that it's the same face, one after the other, makes the Nest cameras feel more like overactive motion detectors.

The other problem is that the Gemini summaries' descriptions are not always correct. The Google Home activity summary brought up a person with a flashlight looking into the front doorbell camera. Naturally, I was struck by the description when I read it. After some scrubbing in the timeline and talking to my husband, it turns out we'd had a nighttime Amazon delivery—common now that daylight savings time is over where I live—and the person leaving the package was using a flashlight to ensure the address matched the house. While I don't expect Gemini to handle that level of detail quite yet, leaving out the delivery person's role only added to the confusion.

Gemini noticed a person approaching porch, but failed to mention it was a delivery person. And so, my heart skipped a beat that I'd missed something. Credit: Florence Ion/Lifehacker

Perhaps most egregious of all, Gemini missed someone stealing all our candy on Halloween night. It didn't even alert me to the fact that people were in the frame. A little less than an hour before the incident, the first-gen Nest doorbell picked up my family and me returning from trick-or-treating, down to the colors of our costumes. But when two adults and a kid walked up to the edge of the walkway outside my front door, it didn't even register as an event. The Google Home app had only denoted it as a "sound."

I scanned the timeline many times before I saw the moment the candy theft occurred. The lack of an incident report tied to a clip made it hard to pinpoint exactly when it happened. Eventually, I took a screen recording of a several-minute video stream around the time the "sound" had been detected. That's when I saw one of the adults in the group stand in front of the candy bowl, I assume to hide the dumping of its entire contents into the bag. Were it not for the physical blockade, the first-generation Nest doorbell camera might have caught the whole thing. Still, it failed to tell me there were people outside my door for a prolonged period, which is the essential information that should have been summarized.

How to set up a Nest camera for success

While Gemini still requires significant refinement on Google's part, you can do a couple of things on your end to optimize the Nest cameras so that the AI summaries aren't consistently off base. The Gemini summaries rely on the quality of data the cameras collect, so refining the Familiar Faces library can help immensely. This helps improve Gemini's "confidence," so to speak, so it's not simply defaulting to "a person."

When I went in to curate Familiar Faces, I noticed that Nest has been bundling my face in with our sitter's, and my husband's face with our daughter's. It's neat that the AI can pick up on subtle similarities here, but it's not super helpful for revealing exactly who is at the door. If the camera mistakenly included the wrong picture, or even a blurry photo, you can delete it from the Familiar Faces library. While you're here, check if the camera has created multiple profiles for the same person. You can merge them to make the data more comprehensive and reduce Gemini's risk of faltering.

The best way to fix Gemini's faux pas is to edit you Familiar Faces library. Credit: Florence Ion/Lifehacker

If you've got a Google Home full of aging Nest devices, ensuring the camera lenses are clean and the hardware itself is properly mounted can do wonders. Google support says doorbell cameras should be about four feet off the ground, while general cameras can be mounted six to eight feet. Most people are captured within 10 feet of the camera. You'll also want to pay attention to light and shadows. Pop in to learn what the cameras see at varying times of day. You're supposed to avoid placing the camera where the sun or bright external lights can backlight a face, but unfortunately, my front door faces west, and the sun loves to hover on that side for the better part of the afternoon.

Activity zones are also crucial to getting Gemini to tell you what's going on. If a camera faces a wide area with lots of irrelevant motion, like trees swaying in the wind, use Activity Zones to specify exactly where packages are dropped in the camera preview. The AI will skip over plants and focus more on the area highlighted. If I had this engaged to look off in the distance, maybe the doorbell camera would have caught the Halloween candy heist.

Gemini is still learning

While aging Nest hardware is getting a tiny boost in utility now that Gemini summaries are a core part of the experience, it still struggles with context. The Nest cameras are good at general motion detection, but Gemini struggles to distinguish people and determine when a human-driven event needs to be addressed.

I reached out to Google with the very specific case of my Halloween candy escapade to figure out what criteria were needed to get the AI to catch on. I received a response with tips on what I could do on my end to improve Gemini's chances of getting summaries. Unsurprisingly, I didn't get a more specific answer than that. The new Gemini infusion is in its nascent stages, which means it's still just the beginning of the road for it. Google wants you to send feedback so it can learn what to tweak to improve the integrated Gemini experience over time.

The Gemini-led Nest summaries in the Google Home app are a valuable tool for reducing notification fatigue and checking quickly on what's happening at the door. But until AI can reliably distinguish between a family member, a delivery person with the right intentions, and an unusual human action as a high-priority event, you'll need to continue to perform your own due diligence. That's not to say the foundation isn't there. But for now, Gemini is still learning.