Google Play Services are the prerequisite for a secure and fluid Tomorrow app experience. Push notifications, updates and more is all provided through the services. Our app is only safe if you have downloaded it from the Play Store. PERIOD. We can't take responsibility for an app you find and download elsewhere. Even if it says Tomorrow on it and it seems to work just fine. The same applies if you change the usage restrictions of the mobile phone manufacturer - i.e. if you have carried out a "jailbreak". Please be on the safe side - it's your money after all.