Give primary account holder (parent) ability to select who gets notifications and emails so not all people get them.
Also- only send 1 notification email per day NOT per addition, comment or like

Please could you make your LOGIN process simpler and easier? Nearly every
app I have allows for a thumbprint login. This would be the most ideal.
Yours requires a "magic link" every single time I want to login. It's
tedious. It makes me not want to use your app and I am strongly considering
being done with this app.

Add settings options to the Flashback function. Personally not a fan of the zoom and pan animation. A simple transition to the next image would be way better

I would like to see how many people viewed or played back a video/photo I posted. This gives me an idea of what to post in the future. This would only work if someone clicked on the image or photo.

The parent should be able to limit who adds photos or videos, because you may want some people to be able to view and comment but not be able to upload stuff.

We’d love to be able to print 4x6 and 5x7 photos.

Allow users to select an option when creating photo books that includes year (which you already offer) and "favorites." The favorites option would automatically create a photo album with all the photos that have been "favorited" by you or family/friends who have joined the album. Since I have uploaded so many photos and spent time favoriting certain photos, it only makes sense to offer this convenient customization feature as an option.

Link to Facebook contacts so you can invite family and friends whose email address you do not have.

'Hi if we can add music to video photo is beter ☺''

''Non si possono scaricare le foto in gruppo....''

''Is there a setting that can prevent a family member from sharing pictures
outside lifecake? ''

'' don’t look forward to the next download when all I want is to download the additional photos since my last one......those won’t be easy to find!''

Can you make the slideshow/flashbacks more editable, for example choosing weather to go from birth onwards or from the present backwards, and being able to add music etc.

''Can you please remove the Other Children from my account? I only want to see my children. It would be great if this ability was given to people to manage their own accounts.''

Since many of us (including me) pay for the premium version, I would love to have more than 50 characters for the titles :) I would also LOVE to be able to add titles during upload :-D

''Please make the option to turn off favouriting.''

Currently I can't see how to put any captions on photos, we are just writing in the comments of each photo. But it's not as impactful since you don't notice the comments right away and have to look further to see them.