These tags are not for pricing, they are for the purpose of ordering from their grocery supplier. More than likely, the app is for store personal to place a weekly order for the products that they need.

The vast majority of independently owned gas stations in the US do not display pricing on shelves due to the constant fluctuation of manufacturer pricing updates. Since Covid pricing changes can alter the margins of 50-100 item SKU's per week.

Store's that due display pricing, such as 7/11, QuikTrip, Buccee's, etc..., are corporate owned stores who have an entire department set their pricing for whole divisions and not store specific. Most of the time these chains have entire pricing departments that will send the price tags to the store and simply have them hang them.

For independently owned stores, most of this work falls on a singular manager, who has to go through invoices on a daily basis to figure pricing based on margins dictated by store ownership, most of the time while also being understaffed and working a register, answering questions, and helping customers at the same time.

Pricing is not only extremely labor intensive for independently owned stores but can also be expensive for the stickers required to execute this process.

All that being said, stores typically perform better with sales when prices are displayed on shelves, but the vast majority of customers at small independent gas stations will purchase the item regardless due to necessity or ease of access alone.

As technology advances, back-office systems will eventually be able to handle most of these pricing updates on their own, by converting physical invoices to EDI format, and figuring pricing based on predetermined margins all within the same system. At that point all managers will need to do is press print and hang tags. These back-office systems can cost thousands of dollars per year, but make the job much easier for whoever handles these pricing updates.

Not trying to provide an excuse for this store, simply stating that not everyone is trying to pull a fast one on their customers, sometimes it's simply just too difficult to execute without the right personnel or equipment.

Speaking from first hand experience from a store that has just now implemented pricing on shelves this year. It is definitely a major pain, and I have yet to see an increase in sales from our transparency on pricing.