When you do app testing, you need to do an adaptation test, and the same page may work differently on different phones.
How to choose the model? Mainly from the following several aspects.
Resolution: The resolution of the iOS phone has1334 x 750,1920 X 1080,1136 x 640,960 x 640, Android phone resolution has 1920 x 1080,2560 x 1440,1280 x 720,960 x 540 and so on.
Operating system: iOS has 8,9.x,10, etc., Android has 7.0,6.0,5.1,4.4 and so on.
Brand: iOS to test the model has 4s,5c,5/5s,6/6s,6p/6s p;android Samsung, Huawei, Xiaomi, Meizu, ZTE, le Vision, gionee and so on.
The number of models the app uses on the market is ranked.
Based on the above four points, a minimum model set can be obtained as an adaptation option.
Also note that if the app on the photo function, to test the dual-camera model.
How to pick a model when doing app compatibility testing