I am having an Android app which uses certain Analytics services such as Google Analytics, Firebase etc. These services collect certain information from the user.
Now I am having certain questions -
1) Can I use an pre checked tick box under GDPR?
2) Since GDPR also requires the data collector to ensure that the user is not under the age of 13 so I am planning to ask the users age only for that region i.e. EU Region. Now will simply mentioning that "By continuing you acknowledge that you are above 13 years" will work or will I have to ask the users age?
3) The GDPR requires the data collector to have a proof of the users consent. Now what kind of proof will be required for my App? I am ensuring that the user cannot move forward without providing the consent(only once) is that sufficient as a proof or is any other proof required?
Any answer would be really helpful.