Solved
The following softwares crash, and don't work.
3DGrapher-5-0-550-0.apk
CasCalculator-5-0-550-0.apk
Geometry-5-0-550-0.apk
Graphing-5-0-550-0.apk
ScientificCalculator-5-0-550-0.apk
The same problem 
The following softwares crash, and don't work.
3DGrapher-5-0-550-0.apk
CasCalculator-5-0-550-0.apk
Geometry-5-0-550-0.apk
Graphing-5-0-550-0.apk
ScientificCalculator-5-0-550-0.apk
What's your phone and Android version?
vivo y97
Android version 8.1.0
Those softwares work well before v550.
Those softwares crash on Android version9, too.
Is there a particular thing to make them crash, or do they just crash on start?
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