Hi Angie, I have been using the IBG star meters which I like and the app(free) on my iPhone 4s. I like this app a lot and my bg goes right into it or the meter can be used alone too. It's very light weight, but it can also be lost easily if you're not careful. I think you can download the app and try it since it can be used with any meter if you enter the bg manually.
I like being able to put custom tags in for everything, see a graph of my bg and see statistics. I also like flipping through the bg to see what is going on and when I last took fast acting etc. I rarely keep my meter attached to my phone for long, I usually keep it in my purse, and I hardly ever charge it and I've had no problems with multiple testing. I have had some problems with the meters breaking etc. when I dropped them because they're fragile but the company ships me a new one overnight for free.
It has made my life so much easier that I don't mind any issues I have had with the meters. I find them to be accurate and no more problematic from that stand point than the other meters I used. If there is an issue with a bg I always retest to confirm it is in that general range. Btw, mine attaches directly to my phone, no connector- for the iPhone 5's you need an adaptor. I also have two back up relion walmart meters in case one of my ibg's fail- this only happened once when I was eating out- I recommend to always have back up meters just in case. Good luck with getting something that works for her and with everything! I think from all the positive mysugr reviews here I'm going to look at that app also.