My family uses OurGroceries. We are a mixed phone family so the fact that it is cross platform was more important to me than it would be for you, but it does also support updates on the web which is nice. It remembers items you've added before, allows you to make separate lists for different stores, and if you assign categories it'll group your list by department.
Free with ad support or you can pay to remove the ads.
OurGroceries lets you sync multiple lists across multiple phones/computers. It also constantly updates so if there are two of you shopping, you can see what the other person has already gotten
EDIT: and it's free.
It can be a hassle, but doing a weekly shop rather than a daily one saves time (and money in fuel costs). Back when my wife got too ill to cook and before up work to look after her I had the same problems, having to fit in getting kids to and from school, whilst working an 80hour week. Some days I'd work 9-5, drive home and cook a meal, and then go back to work for another four or five hours and find myself doing the shopping at midnight in a mostly deserted Tesco.
You just have to sit down and plan a weeks worth of meals before hitting the supermarket. It's not easy especially if you've got kids who are picky eaters, but it's worth the effort. I've got a little app called Our Groceries on my phone that lets you plan recipes and then select and add them to your shopping list. Once you've got a recipe in there it's just a case of clicking 'add to list', and once you've got a bunch of recipes ready it makes planning a weekly shop a damn sight easier.
A slow cooker can make a big difference as well. Stick a bunch of veg, some meat and some water in it and turn it on before you leave for work and you'll have stew waiting by the time you get home. In the summer boil up or steam a bunch of new potatoes in the evening and stick them in the fridge till the next day, add some chopped chives and a bit of mayo and you've got the start of a salad.
There's a lot of tricks tips, the problem is getting out of the rut of fast/junk/pre-prepared food and getting into a routine that still gives you some free time every day and doesn't cost the earth.
Take a look at OurGroceries. It can do all this and more. Also works on multiple platforms:
It's also free, though I opted to pay a one time premium because it's so useful.
I like Our Groceries for apple and android. All of your lists sync in real time between devices so your wife can add to the list while you're shopping, it's easy to organize by aisle or category, you can create all kinds of lists for different stores or events easily, and it sorts the 'Add' list by most used, so it's really easy to go through and see what you will likely need to add for the next trip. http://www.ourgroceries.com/overview
First, again, I am terribly impressed with what you have accomplished with two devs. (Kind of making me feel bad actually.)
I'd be happy to give up MFP, I haven't really see them do anything significant of value in the past two years and I find their mobile apps complex, confusing, and of not much value. But they sure are big.
The worse part of MFP, as far as I am concerned, is that their database is now poisoned with tons of crowdsourced yet wrong food entries all with the same names. I am not sure how to fix that, or how one starts from scratch and builds only quality entries but I wish they (or you!) would attack that.
At any rate, MFP integration would be nice but is certainly not a deal breaker. If I were using ETM for 90% of my meals and they were repeat meals I would reenter them into MFP.
OTOH, you can replace MFP for me in that 93% of the value I get from MFP is the daily diary and it's percentage breakdown of carbs, fat & protein. I get another 5% from daily checkins of weight and weight progress reports, but their graphs are limited and terrible. I get another 2% from its feeding into my anal compulsive narcissistic need to document everything about me.
I personally get nothing from their social aspects or from their hooks into fitness devices.
So an ETM that provides an easy to see diary of what I ate in addition to the meal plan and then a bit of weight check in would let me toss MFP to the dustbin.
My grocery list is OurGroceries (http://www.ourgroceries.com/). It's very simple and shares lists well between Android and web. That's really all I need from a grocery list. Extreme ease of use favoring a few simple features and sharing across of my list across multiple devices.
Thanks!
Have you actually tried planning a menu? It isn't hard. Find enough recipes to last you and your family a week, import recipe items to an app like our groceries and then don't buy things that aren't on the list.