Jacks or Better Double Up is a NetEnt card game whose name points to a well-known card game style. It suits players who want a careful, considered game.
Plenty of card game fans recognise the Jacks or Better name, and the Double Up tag is part of the title. Exact rules, the pay table and how any double-up step works are not described here, since they are not among the given facts.
NetEnt made the game for a player who prefers thinking things through to watching reels spin. There is no live dealer, so you can play at your own pace without outside pressure.
The RTP is 99.56%, a very high figure. It describes the theoretical return across a huge number of rounds, not the outcome of one evening, which can go in either direction.
The game plays on mobile. Even a high RTP does not make play risk-free, so settle on a staking limit beforehand and play for entertainment only.
Jacks or Better Double Up is made by NetEnt.
The RTP is 99.56%.
No, the game has no live dealer.
Yes, it is playable on mobile devices.