[rgrove]

SmugMug will give you unlimited photo storage for as little as $6.25 US per month (if you pay yearly). There are official apps for iOS and macOS (as well as other platforms) that support auto upload. You can easily share your account with your wife.

While the default SmugMug experience emphasizes publicly sharing your photos via a personalized photo site, you can just set everything to private, leave the website empty, and use the private Photo Library and Organizer features to manage your photos. The Photo Library provides a great UI for browsing and searching on the web (including mobile devices), and the iOS app offers a fast native iOS browsing and searching experience.

Full disclosure: I work for SmugMug!

https://www.smugmug.com/plans

[Ruarl]

The listed price for the lowest tier is $132 per year, which is around $11 per month. What’s the $6.25 option?

[rgrove]

Whoops, I probably should have known better than to mention specific pricing since it can vary based on local taxes (such as VAT), and because we test different plans from time to time. But if you're interested in the lower tier plan I mentioned and you're not seeing it on the site, feel free to email [e-mail] and ask for Jennifer, one of our Support Heroes. She'll take care of you!

[Ruarl]

If it’s detected my location correctly, it would be $7.50 a month. Colour me much-less-interested as a result of shenanigans-based pricing.