
Clear app cache on Android
Clear an app's cache on Android to fix crashes and free up space. Step-by-step instructions for Samsung, Google Pixel, Xiaomi and other phones.
Practical technology help
Clear, step-by-step fixes for iPhone, Apple, Android and the apps you use every day. Find the setting, understand what it does, and get back to what you were doing.
Featured

Clear an app's cache on Android to fix crashes and free up space. Step-by-step instructions for Samsung, Google Pixel, Xiaomi and other phones.

Find your iPhone's Maximum Capacity in Settings, understand what the percentage tells you, and learn when a battery replacement is actually worth it.
Start with the symptom
Most people arrive with a symptom rather than a setting name. Pick the one that matches.

Google Messages waiting to connect or stuck on setting up chat features? Check data, your number and the RCS switch, then clear the app data. 7 fixes that work.

Samsung shows message blocking is active and your texts will not send? Check blocked numbers, your carrier block and account settings with these steps.
Pixel can't cast to Samsung TV or says no devices found? See why Samsung TVs hide from Cast, fix Wi-Fi and permissions, or use a cable or dongle.

Apple Trade In offered less than the quote after inspection? See why values change, how to accept or decline a revised price and how to avoid a cut next time.

Apple Wallet verification not available when you add a card? Check the bank options, region and date, remove the card and re-add it from your bank app. 7 fixes.

Apple Watch says continue setup on iPhone but nothing happens? Finish pairing, restart, reset in pairing mode, or unpair and start again. Steps for each case.

How to change km to miles on iPhone: set Measurement System for Apple Maps and Distance units in Google Maps. Also change temperature units.

How to activate eSIM on iPhone with a QR code, manual details or your carrier's app. Steps for Verizon, AT&T and T-Mobile, plus fixes when activation fails.

How to add home button to iPhone screen: turn on AssistiveTouch in Accessibility, tap Home, move the button and set shortcuts. Works on every iPhone, no repair.

How to change a document to PDF on iPhone: use Files and Markup, the Print trick, Pages, Word or Google Docs. Free, no extra app needed, for each file type.

How to change AirDrop name on iPhone: edit your iPhone name and your contact card, because AirDrop shows one or the other. Fix a name that won't update.

How to change color on iPhone: use Color Filters, Night Shift, Dark Mode, tinted icons and Lock Screen colors. Also fix a black and white or yellow screen.

How to change group chat name on iPhone: open the group in Messages, tap the names and choose Change Name and Photo. Fix a group that can't be renamed.

How to change country on iPhone: change your Apple Account country or region for the App Store, plus the device region. Steps, limits and what to do first.

How to change your iPhone name in Settings › General › About › Name. See where it shows in AirDrop, Bluetooth and hotspot, and fix a name that won't save.

How to download and install WhatsApp on iPhone from the App Store, verify your number and restore chats. Fixes if the code never comes or install fails.

How to download Google Play Store on iPhone? You can't, because it only runs on Android. See why, which tricks to avoid and what to use instead.

How to pay with Google Pay on iPhone: you can't tap to pay in stores, but Apple Pay can. See what Google Pay does on iPhone and how to set up Apple Pay instead.

How to report bugs on iOS: use Feedback Assistant, Apple's feedback page or Apple Support, and learn what makes a bug report useful. Steps for any iPhone.

How to use an iPhone for the first time: buttons, gestures, Home Screen, Control Center, calls, texts, camera, apps and safety. Simple steps for beginners.
Browse
Every guide belongs to one category, so you can work through a device or a topic in order.
Settings, features and fixes for iPhone, from battery and storage to Face ID and iOS updates.
81 guidesApple ID, iCloud, Mac, iPad, Apple Watch and the services that tie them together.
54 guidesAndroid settings, Google account issues and device-specific fixes explained step by step.
53 guidesFixes and walkthroughs for the apps people use every day: messaging, streaming, storage and more.
41 guidesStraightforward walkthroughs for the things people actually need to do on their phones.
156 guidesSomething is broken. Work through the likely causes in order, starting with the quickest fix.
15 guidesLonger explainers for settings and features worth understanding properly, not just toggling.
24 guidesNewsletter
A short email with the guides people needed most that week. No promotions, and you can unsubscribe in one click.
Looking for something specific? Search every guide.