A frozen app — open, but not responding to any button press — has a different fix than one that crashes outright.
A frozen app stays on screen but stops responding to the remote entirely, which is a slightly different problem from a crash and calls for a slightly different fix.
Frequent freezing on a specific app often means it's time to clear its cache or reinstall it — see our guides on clearing cache on a streaming app and resetting a streaming app that's not working.
That's more likely a device-level issue — see our guide on signs it's time to upgrade your streaming device.
Compare subscription options and device support to find the plan that fits your household.