I love this app and highly recommend it. Great way to keep track of maintenance schedule, parameters, livestock, and, what I like best of all, is coral growth.
Whenever you add a picture to the livestock, it adds the date it was taken.
If you have old photos i think it uses embedded info so it automatically uses the date taken, not the date added.
I liked the app so much I paid to have the ads removed. Not that they were annoying, just ti throw some money at the developer. Lol