iOS 14がインストールされた実デバイスでの計測値は下記。AudioProcessorEditorのresized()でgetWidth()/getHeight()にて取得。

App	iPad Pro 9.7	iPhone 11 Pro
Standalone (Landscape)	1024 x 768 (1.33)	812 x 375 (2.17)
Standalone (Portrait)	768 x 1024 (0.75)	375 x 812 (0.46)
GarageBand 2.3.10	1024 x 335 (3.06)	667 x 202 (3.30)
Cubasis 2.8.4	1024 x 342 (2.99)	-
Cubasis 2.8.4 (with side bar)	811 x 342 (2.37)	-
Camelot 2.0.1 (Landscape)	1018 x 334 (3.04)	-
Camelot 2.0.1 (Landscape, Expanded)	1018 x 718 (1.42)	-
Camelot 2.0.1 (Portrait)	762 x 462 (1.65)	-
Camelot 2.0.1 (Portrait, Expanded)	762 x 974 (0.78)	-