Sounds cool right?
Most importantly, your data won't be stored by a tech giant whom may sell you out for their gain. All the data will be stored locally and you have 100% control over the app.
The app is simply a blank geo reminder. You need to feed in your local supermarket postcodes, or whatever the places you need reminder to go for.
Then, you can set up the custom radius 0 mile to 100 miles for trigger the remind
You choose what the reminder should say
Finally and most importantly trigger the reminder "When Enter" or "When Exist" that zone