I made myself a bump banner to take pics with. I started with 7 weeks when we got our first ultrasound. I know it'll be a while before I change too much, but I've been incorporating the seasons and holidays in the pics. I know a banner is kind of old school, but I'm having fun with it.
Pixlr. Available on android and iOS. Different fonts sizes colors etc. it's how I labeled my first us since it was external and showed stuff but needed clarification.
Re: baby bump pictures
DST T4L