Here are popular, legitimate real‑money blackjack apps available to U.S. players — plus what to watch for. Note: online casino availability (which apps you can actually play for real money) depends on the state you are physically located in and you must be 21+ (or older where state law requires). I’ve listed the major operator apps and short notes about where they operate and features.

Popular real‑money blackjack apps

• BetMGM Casino — Offers many RNG blackjack variants and live‑dealer blackjack; available to play for real money in states where BetMGM’s casino is licensed (e.g., New Jersey, Pennsylvania, Michigan, West Virginia). BetMGM uses geolocation and requires age verification. (casino.BetMGM.com)
• FanDuel Casino — Mobile app with blackjack and live dealer tables; FanDuel Casino operates in regulated states such as Michigan, Pennsylvania, New Jersey and West Virginia (21+ and location required). (apps.Apple.com)
• DraftKings Casino — Offers a range of blackjack games (including live dealer) inside the DraftKings Casino app; availability is limited to states where DraftKings has an online casino license. (apps.Apple.com)
• Caesars (Caesars Palace Online Casino) — Caesars runs regulated online casino apps (e.g., NJ) and has launched proprietary online blackjack content; playability depends on which states Caesars is licensed in. (newsroom.Caesars.com)

How to choose and use an app safely

• Check whether the app is legal where you are located right now. Most major apps will explicitly list the U.S. states where their real‑money casino is licensed. (Apps can be downloaded in more places, but real‑money play is blocked via geolocation in non‑licensed states.) (casino.BetMGM.com)
• Download only from official app stores (Apple App Store / Google Play) or the operator’s official website and confirm licensing info on the operator’s site. (apps.Apple.com)
• Look for: licensed/regulatory disclosures, responsible‑gaming tools (self‑exclusion, deposit limits), clear withdrawal policies, and reputable payment options. Major operators typically publish these details. (casino.BetMGM.com)
• Try free/demo modes first to learn rules and table limits before betting real money (most apps offer play‑money/demo versions). (apps.Apple.com)

Legal / practical reminders

• State rules vary and change over time — if you need to know whether a specific app is currently legal where you are, I can check the app’s current state list and licensing for your state right now. (casino.BetMGM.com)
• Gambling involves risk — only gamble with money you can afford to lose and use the operator’s responsible‑gaming features if needed. (casino.BetMGM.com)

If you want, tell me:

• Which state you’re physically in (or want me to check for), and I’ll confirm which of these apps currently allow real‑money blackjack there; or
• If you prefer, I can compare welcome bonuses, typical blackjack variants (single‑deck, multi‑hand, surrender, live dealer), or fees/withdrawal times for 2–3 apps.