Just another shout out for 1Password. I got the iOS app ages back when they put it available for free (I guess it's now always free, but they did a "sale" at one point.). I didn't have a device that used it at the time.. but once I did, it's indispensable. It has a lot more options than I use (or need) but it's ease of use for what I do need is great.
Agile bits is a very active developer, so no fear of abandonware, either.