
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.

A carrier locked iPhone only takes an eSIM from its own carrier. See how to check the lock in Settings, why a travel eSIM will not activate, and how to unlock.
The latest iPhone and Android software updates in one place: iOS 27.0.1 fixes, Pixel update dates, who can update, and our guides for problems after an update.

Find APN settings on your iPhone in Settings › Cellular › Cellular Data Network. Learn why the menu can be missing, what each field means and how to reset it.

Check if an iPhone is genuine before you buy. Use the serial number on Apple's Check Coverage page, match the IMEI, review Parts and Service History and check Activation Lock.

Turn data roaming on or off on iPhone in Settings › Cellular › Cellular Data Options. Check your plan first to avoid charges, and fix roaming when it will not connect.
iPhone steps stuck at zero or not counting? Turn on Fitness Tracking, check Health data sources, carry the phone right and try 3 more fixes, with or without an Apple Watch.
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.
60 guidesApple ID, iCloud, Mac, iPad, Apple Watch and the services that tie them together.
44 guidesAndroid settings, Google account issues and device-specific fixes explained step by step.
45 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.
138 guidesSomething is broken. Work through the likely causes in order, starting with the quickest fix.
12 guidesLonger explainers for settings and features worth understanding properly, not just toggling.
23 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.