You Do Need power plug adapter while traveling from Germany to Philippines.

Here is Why You Need An Adapter

The outlet and plug type used in Philippines are A, B and C and in Germany are C and F. This is how they look like.

Germany

In Germany, outlets of type C and F are in use.

Type C

Type F

Philippines

In Philippines, outlets of type A, B and C are in use.

Type A

Type B

Type C