The first time you download the Math Tutor app on a device, or if you delete and re-download the app, you'll have to go through the process of getting your iPad to trust our developer.
Here are the steps:
1. Go to iPad Settings, then click General on the left and Profiles and Device Management on the right.
2. You should see Crashlytics at the top, then a heading that says Enterprise App below it. Under Enterprise App, there will be an option that says MathElf, Inc. Click that.
3. Click Trust MathElf, Inc.
4. Click Trust in the pop up.