Sonar Echo app for iPhone and iPad

This is a submarine game like a simulator.
This game is inspired by WW2 Age submarines.
5 Stages + 6 Additional ( Expert ) Stages + and 1 Tutorial stage.

You can control and enjoy submarine in short time.

Include AD.

Stage2 will be available when youve completed Stage1.

This is the same as for stage 3, 4, 5.

You can play additional stages when you had completed Stage2.

No In-App purchase.

This app is just a game , NOT simulator. feel and enjoy!

Support OS:

iOS 9.3+

Minimum Environment ( Devices equipped CPU-A7 ):
iPhone 5S
iPad Air
iPad mini 2
iPad mini 3

Recommended Environment ( Devices equipped CPU-A8 or more ):
iPhone 6+
iPhone SE+
iPad mini 4+
iPad Air2+
iPod Touch 6th generation +

You can enjoy full performance on A9CPU or more. ( iPhone6s+,iPhone SE etc. )

Requires Metal Environment and Device Gyro.

In less environment it is possible that the effect of such action is slow out.