This app was mentioned in 5 comments, with an average of 1.20 upvotes
Mattress Bucket List is basically a list of activities to try -- and choose from among the ones that each partner is willing to do. If nothing else, you could grab the ones you like from there. There's a paid version that has more options.
If you're looking for fun games though, you might try Mattress Mambo 2
Simpler design, but there's an app for that Mattress Bucket List. Though if you're more game oriented, try Mattress Mambo 2
There are free and paid versions but two in the Play Store are: Matress Bucket List (https://play.google.com/store/apps/details?id=com.hiddengnome.mambobucket.free) for just a list of activities. And Mattress Mambo 2 (https://play.google.com/store/apps/details?id=com.hiddengnome.mattressmambo2.free) for a more game/ramp up.
There's an app for that: Mattress Bucket List Maybe more tame then you're thinking though.
mojoupgrade is definitely one way to go. You can also check out /r/sexygames. If you have an android device you could try Mattress Bucket List if you want to foreplay ideas where you can each keep a list of items to try. If you'd like more game oriented then check out Mattress Mambo 2