Subtraction App For Kids does not collect any personal information.
There are no 3rd party adverts, links to web sites or any social media.
Some basic usage information is sent to Flurry analytics. This information contains what type of device and iOS version you are using and information for our programmers in the event that the app crashes. We use this information exclusively to track down problems with the app.
Flurry have their own privacy policy here: http://www.flurry.com/privacy-policy.html
If you would like any further clarifications, please contact us.