It doesn’t hurt to restart your device to rule out other issues.  iOS: Press and hold the side button, then drag the on-screen slider to the “Off” position. Press the button once more to turn the device back on. Android: Press and hold the side button and then tap “Power Off” on the screen. Press and hold the button again to turn the device back on. Tap the Tinder icon on your home screen to try again. Tinder may crash because it’s running out of memory due to too many apps open at once. To see a list of open apps:  iOS: Double-click the Home button to see all the running apps. Android: Tap the square button at the bottom right corner to show all open apps. Closing some of the apps you’re not using can help free up memory and speed up your device.  In iOS, swipe up on each app to close it. Android users can swipe apps to the right. If you’re still running into issues, keep troubleshooting.

Summary:
Restart the device. Open Tinder. View all of the apps that are running. Swipe away apps you want to close. Launch Tinder to see if it’s running better.