When apps on your iPhone 17 Pro Max start closing unexpectedly or freezing up, it pulls you right out of whatever you were doing. It's a common hiccup that usually stems from a software mismatch or a bit of corrupted data. The fixes are often straightforward, and you can typically get things running smoothly again in a few minutes.
I'd start with a simple force restart. It's the quickest way to clear out any temporary glitches in iOS 26 that might be tripping up your apps. Press and quickly release the Volume Up button, then quickly press and release the Volume Down button. Finally, press and hold the Side button until you see the Apple logo appear, then let go.
Update the Problem App
Developers are constantly pushing out updates to squash bugs and improve compatibility with new iOS versions. Head to the App Store and tap your profile icon in the top right corner. Scroll down to see if any updates are pending, especially for the app that's been acting up.
If you see an update for it, install it and then give the app another try. This single step resolves a huge number of crash reports I've seen.
Check for an iOS Update
Sometimes, the issue isn't with the app itself but with the underlying system software. Apple releases iOS updates to patch known issues that can affect app stability. Go to Settings > General > Software Update.
If an update for iOS 26 is available, it's a good idea to install it. Make sure your iPhone 17 Pro Max is connected to Wi-Fi and has sufficient battery, or plug it into your charger. Using the Apple 40W Dynamic Power Adapter will get it charged up fastest if you're in a hurry.
Offload and Reinstall the App
If updating doesn't help, the next step is to give the app a completely fresh install. iOS has a handy feature called Offload App that removes the app but keeps its documents and data. Go to Settings > General > iPhone Storage.
Find the problematic app in the list and tap on it. Choose "Offload App," then confirm. Once it's offloaded, you can tap "Reinstall App" right from that same screen, or find it again in the App Store. This reinstalls the core application files without you losing your login info or saved data.
Close and Reopen the App from the App Switcher
For a single misbehaving app, try fully closing it from the app switcher. Swipe up from the bottom of the screen and pause in the middle to bring up the card view of your recent apps. Find the app's card and swipe it all the way up and off the top of the screen to close it.
Then, tap its icon on the Home Screen to launch it fresh. This is different from just going back to the Home Screen, as it forces the app to restart its processes from scratch.
Check Your Network Connection
Apps that rely heavily on a live internet connection, like social media or streaming services, can freeze or crash if your connection is unstable. Try toggling Airplane Mode on and off from the Control Center to reset your cellular and Wi-Fi radios.
You can also try switching between Wi-Fi and your 5G/6G cellular data to see if the problem is specific to one network. A weak signal can sometimes cause the app to hang while it waits for data.
Free Up Storage Space on Your iPhone
While the iPhone 17 Pro Max comes with a lot of storage, if you're getting critically low, it can affect system performance and app stability. iOS needs free space to create temporary files and cache data. Go back to Settings > General > iPhone Storage.
The system will show you recommendations for optimizing storage. You can review large attachments in Messages, enable iCloud Photos, or delete unused apps and their data. Even freeing up a few gigabytes can make a noticeable difference.
Reset All Settings
This is a more substantial step, but it won't delete your personal data like photos or messages. It resets all your system settings, like Wi-Fi passwords, wallpaper, and privacy permissions, back to their defaults. This can fix crashes caused by a corrupted preference file.
Go to Settings > General > Transfer or Reset iPhone. Tap "Reset" and then choose "Reset All Settings." You'll need to enter your passcode. After the phone restarts, you'll have to reconnect to Wi-Fi networks and re-customize some settings, but your apps and data remain.
Restore Your iPhone via a Computer
If you're still facing persistent crashes across multiple apps, restoring the iPhone software is the final step. First, make sure you have a recent backup in iCloud or on your computer. Connect your iPhone 17 Pro Max to a Mac or PC using a USB-C cable.
On a Mac with macOS Sequoia or later, or a PC with iTunes, put the iPhone into Recovery Mode. Quickly press and release the Volume Up button, then the Volume Down button, then press and hold the Side button until you see the recovery mode screen. From there, you can choose to "Restore" which installs a clean copy of iOS 26.
After the restore is complete, you can set up the phone as new to test if the crashes are gone, or restore from your backup. Setting up as new will tell you for sure if the problem was with your iOS installation.
