Currently, I have the Apple Watch Series 11 and the Oura Ring 5 on, but I’ve worn earlier generations too, including the Watch Series 10 and Oura Ring 4. The Apple Watch Series 11 sleep scores are higher than those of other sleep trackers, including the Oura Ring 5. Battery lifeThe Apple Watch Series 11 has a longer battery life than the Watch Series 10, but we are still talking about daily charging for the most part. The Oura Ring 5’s battery life is about seven days for me, though I expect it to reduce over time, as it did with the Oura Ring 4. Apple Watch Series 11 vs Oura Ring 5: which should you buy?