iSleepWell (iOS 7) cydia tweak is useful to turn airplane mode ON when going to bed by just putting your iDevice beside you on the screen side. (face-down).
It detects that position and turns off all radios.
You can sleep without being disturb by unsolicited calls and you are not bombarded by negative waves.
If your device does not switch while face down, try adjusting sensitivity towards 0%, then raise it again step by step to find the value that suit your needs
Many parameters can be changed.
No icon added to home screen. Configure options from Settings app.