I used pathways.org (which will probably turn into a weblink but it’s also an app!) It shows skills/milestones in an age range (eg:18-24 months, can kick a ball) and it has age-appropriate activity recommendations. Best of all it’s free so you can download and delete if it’s not what you want!
The bump is a really good website. It gives you weekly/montly updates with toy and activity recommendations
BabySparks app x
BabyCentre app I used throughout pregnancy up to now. You may just need to put dates into it so it knows you have given birth and your babies age.