This app was mentioned in 8 comments, with an average of 1.50 upvotes
I'm from the EU and I've only been on vacation to California, so I'm not sure if it covers all states, but why not check the Weedmaps app? I've used and loved it. Unless you are refering to the black market.. haha
Android: https://play.google.com/store/apps/details?id=com.weedmaps.app.android
Someone posted a link to one. I originally used weed maps. Now I just go to Herbs 4 you on 9th between Lincoln and Broadway. They have 1/8s for $25 everyday. You can buy smaller nugs 1/8s for $15-20. They call it shake but some of them are still nugs. I recommend you check it out. They also do promos like free joint with an 1/8 on Wednesdays.
You can also use the Weedmaps app (or website) to find dispensaries near you.
Filter by Amenities (Recreational) or by Age, to find recreational.
https://play.google.com/store/apps/details?id=com.weedmaps.app.android
Shows deals that are going down in your location too!