1)Apple Inc
2)Apple A13 GPU
3)OpenGL ES 3.1 build 1.4@3443629
4)

GL_APPLE_clip_distance
GL_APPLE_color_buffer_packed_float
GL_APPLE_copy_texture_levels
GL_APPLE_rgb_422
GL_APPLE_texture_format_BGRA8888
GL_EXT_color_buffer_half_float
GL_EXT_debug_label
GL_EXT_debug_marker
GL_EXT_pvrtc_sRGB
GL_EXT_read_format_bgra
GL_EXT_separate_shader_objects
GL_EXT_shader_framebuffer_fetch
GL_EXT_shader_texture_lod
GL_EXT_shadow_samplers
GL_EXT_texture_filter_anisotropic
GL_IMG_read_format
GL_IMG_texture_compression_pvrtc
GL_KHR_texture_compression_astc_ldr
GL_OES_standard_derivatives
GL_RED_BITS8
GL_GREEN_BITS8
GL_BLUE_BITS8
GL_ALPHA_BITS8
GL_DEPTH_BITS32
GL_STENCIL_BITS8
GL_MAX_TEXTURE_SIZE16384
GL_MAX_VIEWPORT_WIDTH16384
GL_MAX_VIEWPORT_HEIGHT16384
GL_NUM_COMPRESSED_TEXTURE_FORMATS42
GL_ALIASED_LINE_WIDTH_MIN1
GL_ALIASED_LINE_WIDTH_MAX16
GL_ALIASED_POINT_SIZE_MIN1
GL_ALIASED_POINT_SIZE_MAX511
GL_MAX_CUBE_MAP_TEXTURE_SIZE16384
GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS51200
GL_MAX_COMBINED_UNIFORM_BLOCKS 24
GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS32
GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS 50048
GL_MAX_COLOR_ATTACHMENTS4
GL_MAX_ARRAY_TEXTURE_LAYERS2048
GL_MAX_3D_TEXTURE_SIZE2048
GL_MAX_ELEMENTS_VERTICES1048575
GL_MAX_ELEMENT_INDEX4294967295
GL_MAX_ELEMENTS_INDICES150000
GL_MAX_FRAGMENT_INPUT_COMPONENTS64
GL_MAX_FRAGMENT_UNIFORM_BLOCKS12
GL_MAX_FRAGMENT_UNIFORM_VECTORS224
GL_MAX_FRAGMENT_UNIFORM_COMPONENTS896
GL_MAX_PROGRAM_TEXEL_OFFSET7
GL_MAX_RENDERBUFFER_SIZE16384
GL_MAX_SAMPLES4
GL_MAX_SERVER_WAIT_TIMEOUT-1
GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS4
GL_MAX_UNIFORM_BLOCK_SIZE16384
GL_MAX_UNIFORM_BUFFER_BINDINGS24
GL_MAX_VARYING_COMPONENTS60
GL_MAX_VARYING_VECTORS15
GL_MAX_VERTEX_ATTRIBS16
GL_MAX_VERTEX_OUTPUT_COMPONENTS64
GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS16
GL_MAX_VERTEX_UNIFORM_BLOCKS12
GL_MAX_VERTEX_UNIFORM_VECTORS512
GL_MAX_VERTEX_UNIFORM_COMPONENTS2048
GL_MAX_TEXTURE_IMAGE_UNITS16