How do I log in my learner from Khan ios app account on PC

Hi there!

You can log into your child's Khan Academy account by going to https://www.khanacademy.org/ and entering his login information. 

Also, to troubleshoot your Khan Academy app, try uninstalling and reinstalling it as it can help solve the issue you're running into. If the issue persists, please submit a support request in our Help Center: http://khan.co/KA-support.

Hope this helps!