I used Levels, which integrates to Librelink from Abbot.
Levels just puts a nice UI on top of Librelink, like scoring meals and days, finding associations between meals and giving you tips.
I stopped using these because they are expensive (at least 100 per month if I only used Librelink, think it depends on country as my moms buys hers in Colombia not the US) and I was just looking to learn about certain meals/timing/etc.