iphone 4s

Dear experts,

I was just wondering if any of the members have experience with the following aspects of iphe4s:

1. tried using it while in sauna/steam bath
2. while swimming(if yes then while is a good waterproof material used)
3. Any app which automatically pops us things to do and also could captur notes against each particular date. (I currently have readdle-calendar, but not sure if it can capture notes a gainst a particular date).

Thank you