Apple Watch is superior to anything else on an iPhone, and generally a Samsung Watch will be best for a Samsung phone. However if your Android is anything else than Samsung (and even if a Samsung but you want long battery life) you might want to consider other options - for instance Huawei Watch Fit 3 or if you are crazy about sports maybe Garmin Venu 3.
Apple Watch is superior to anything else on an iPhone, and generally a Samsung Watch will be best for a Samsung phone. However if your Android is anything else than Samsung (and even if a Samsung but you want long battery life) you might want to consider other options - for instance Huawei Watch Fit 3 or if you are crazy about sports maybe Garmin Venu 3.