Still no contact from developer about missing profiles, so app is not reliable and all of your info can disappear for no reason.
UPDATE:
I think that the issues below were addressed which made Vaccy awesome for keeping track of my two kids' vacs, but now all of the profiles have disappeared and there is seemingly no way to recover anything. So now it's useless unless the developer can help me recover my info.
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This could be a great app but needs some improvement:
Instead of entering each dose of a vaccine in it should be setup where you select the vaccination and then you enter the doses as you get them, this makes for a lot less data entry. If that is not an option there should be a copy option, so if I have to put in each dose individually I should be able to duplicate a previous dose and simply change the date.
The biggest glaring, unforgivable mistake is that you can not schedule future vaccinations for disease not yet covered, for example my son missed his MMR as an infant, he is now three and we want to enter it as a future vaccination, but there is no way to do this. So Vaccy is great for tracking how many MORE doses/boosters you need, but completely useless for vaccines you have not started yet, which kind of makes this useless. That's a shame because I put a lot of work in to this and now I still need to keep this sheet I got from his doctor!
Once these issues are fixed it will be a five star app, for right now it isn't worth the .99 I paid.