NEW as of 11/9/18:
App now includes MP Dining and MP Shopping in addition to eGift cards.

Dining: Once you log in and enable location sharing the app will tell you what MP Dining restaurant options are in your area. The app appears to know if you are a base or VIP dining member, and shows the appropriate earn rate you can expect (3 for base member or 5 miles per $ for VIP). Restaurants show in an incomplete "Nearby" list or are further visible under the "Cuisine Types" tab.

Shopping: You can browse the same list of stores you'd find on the main MileagePlus shopping website. There are tabs to show which stores are offering elevated offers as well as another with a searchable list of all stores who participated in the program. Tapping on the store will give you the option take you to that store's site so you can shop in your device's browser just as you would on a laptop or desktop.

Maximizing this app opp:
As per the app, you can double or triple dip. You get the UA miles from the app (+25% bonus if the app is attached to a MP acct), you get the miles (or CB, or whatever the deal is with your CC) from the CC attached to the app (via .bomb), and if you use the GC that is generated by the App and apply it online to a purchase via the MP shopping portal, you get the UA miles for that as well.
Ex: Buy $50 Staples MP-X credit with the app and get:
A. 2x on the app at Staples=100 UA (if you have a MP CC attached to the app, you get 25% more = 125 UA), PLUS
B. 2% CB with your BA+ card for example = $1 CB (but then no extra 25% bonus shown in A., above), PLUS
C. 1x on MP portal = 50 UA


Total would be 150 UA + $1CB in the example above (a UA double dip, e.g. A and C, but a non-UA dip added).

More scenarios:
-If you used a 1x UA MP card in the above example, it would be 125 UA+50 UA+50 UA=225 UA (a UA triple dip, e.g. A, B, and C).

-If you used a 5x INK card in the above example, it would be 100UA+*MAYBE 250UR+50UA = 150U+*MAYBE 250UR (a UA double dip, e.g. A and C, but a non-UA dip added and IMHO the best value: effectively 8x! *assuming the INK codes correctly as office supplies**).

**This is probably not the case, see post 513- no triple dipping

Conversions
Some MPX merchants allow for the purchase of a gift card with a gift card. This may allow you to use MPX to indirectly purchase a gift card to shop at a merchant otherwise not offered on MPX. As always, YMMV as you may encounter some merchants that may not allow this practice, rogue cashiers/managers who think it might not be allowed, or POS systems that are designed to not allow this (understandable as they make little to no money on the sale).

These merchants *may* include:

Best Buy - Does not allow purchase of Visa/Amex/MC gift cards, other merchant GCs OK.
GameStop
Sears

MPX Merchants that sell other merchants' GCs, but do not allow the purchase of GC with GC (MPX or otherwise):

Staples - Not allowed per policy, but may go through on their POS if cashier ignores prompt.
Barnes and Noble - No official policy - cashiers are trained that it's not allowed although it will go through on their POS
Office Depot
Lowes
eBay

Note: There appears to be a $3000.00 per 24 hours spend limit

MPX only works within the US - as per T&Cs! If you try to use the app outside the US, error code 126 will pop up.

Your MPX account name and password are the same as the united.com / MP account name and password. And your mile earned are locked to that MP account.
If using MPX to get a few miles to prevent mileage expiration, you need to be logged in as that account whose miles are approaching expiration.

In your account info is "Member since " date

customer service email address, [email protected]

Archived posts - MileagePlus X – Shopping App to Earn Additional Award Miles [ARCHIVE]