I totally get the frustration with the iOS and Android split, its honestly a nightmare trying to coordinate everyone when the tech just wont behave. I have spent a lot of time testing these for family events and weddings, so I have a few pointers for you. I would suggest looking into Giftful. It has been the most reliable for me across different devices, but you still need to be a bit cautious with a few things:

• Make sure to test the share to app function on both your Samsung and your sisters iPhone. Sometimes the way Android handles the metadata scraper is slightly different than iOS, so it might pull a weird image if the site has heavy ad trackers.
• You might want to consider telling your family to use the browser extension for adding items rather than just copy-pasting links manually. It tends to grab the price and image more accurately than the mobile app sometimes.
• Be careful with stores that have login walls. If you try to add something from a private cart or a member-only sale, the link might break for your aunt on her iPad later because she wont have your login info.
• One thing I love is that people can mark items as purchased without needing to create a full account, which is huge for avoiding those how do I log in phone calls from less tech-savvy relatives. Just a tip, Share Product is awesome for housewarming registries if you want something that isn't clunky.

I saw this and it reminded me of the mess I dealt with for my daughters graduation last year. Im usually the type of person who sticks to the boring, tried-and-true stuff because I absolutely hate getting those panicked phone calls when a link doesnt work. I spent weeks trying out different universal registry apps and honestly most of them are just too buggy for a big family event where people are using all sorts of different devices. I ended up being really satisfied with a hybrid approach. The secret for us was making sure the person creating the list used the Amazon Wishlist Chrome Extension on their desktop. It sounds simple but that specific tool is way more reliable at scraping metadata from external sites compared to the mobile apps. When you use the mobile share button on a phone, it often misses the price or grabs a weird thumbnail image, but the extension actually pulls the clean data directly from the source code. It worked perfectly for our mix of Android and iPhone users because once the item is on the list, the redirect is stable. I had no complaints from the older relatives using iPads, which is basically my gold standard for tech working well. Plus, you dont have to worry about a startup shutting down halfway through your planning... that would be a total nightmare for a wedding. Just make sure you double-check the privacy settings so the list is viewable without a login, and it should be smooth sailing.

I saw this and had to jump in because I went through this exact same headache for our big family reunion last year. In my experience, the biggest issue with these universal wishlists isnt even the app interface, its how they handle metadata. Most of those shiny new apps use cheap scrapers that cant read the modern code on big retail sites, which is why your prices stay at 0 or the images are just blank squares. Its super annoying when you're trying to stay organized and half the links look broken. Over the years, I've tried basically everything out there because half my relatives are on ancient Android tablets and the other half have the newest iPhones. I finally landed on using Giftster after realizing that the flashy apps usually trade stability for aesthetics. What I like about it is the way it handles external links... it doesn't try to be too clever. It just pulls the raw data and lets you edit it if the retail site is being stubborn. I've found that the simpler the UI, the less chance my tech-illiterate uncles have to break something. I spent hours testing different browser extensions and honestly, most of them are bloatware that slows down your machine. I eventually just stuck to the ones that have been around for a decade because they've actually patched the bugs that make Chrome crash. You really want something that prioritizes the database sync over fancy animations, especially with a wedding where people are buying things at the last minute and you cant afford a laggy server.