Gear S2 with Galaxy S4

Hello everyone,

I am planning to buy the watch when it will launch in India later this month.
I have international samsung galaxy S4. It has 2GB ram , and Official Android 5.0.1.

Today, I tried to download "Samsung Gear" app from google play store, however it showed me a message " Your device is not compatible with this version".

Will it be compatible with the Gear s2 watch? or do I need to upgade my phone.

Please advice.

Thanks,
Sid