Just like most apps, the Smappee app does have some a minimum system requirement for both Android and iOS. We advice to check if your device is compatible in the google play or Apple store.
You can find the minimum system requirement listed in the About this app section of the store page of the app.
Usually, the store page will also analyse and inform you if your current device is compatible with the Smappee app. Please also note that the Smappee app is not compatible on Windows phones.