The only one worth using is Huckleberry. And even then, not until min 8 weeks and I would use the sleep tracking ONLY, maybe medicine dosage tracking (if you sync it with your partner) and ignore absolutely everything else. It's useful for the nap predictor, which doesn't work until 8 weeks old.
Never track length and frequency of breastfeeding - it will make you crazy trying to make sense of it (newborn breastfeeding doesn't work to a pattern) and it gives you absolutely no useful information. Midwife might well ask how feeding is going, but she doesn't need a blow by blow "Well last Wednesday baby had 17 feeds of 2, 7, 23, 14, 10, 47 and 9 minutes each". She just wants to know are you comfortable vs in pain, does baby latch easily or are you struggling, do they seem settled after feeds, are you happy with the frequency, do you have any questions etc.
Nappies you might want to track if you've been asked to count them, but it's not normally something you'd want/need to do. You might be asked if you're getting at least 6 wet/dirty nappies each day. It will be obvious if you're getting about this many or significantly less and you won't need to track them to know the answer :)