There are a lot of apps for this purpose. There are also apps to password protect your app, files, phone, photos, videos etc. You can just search online and choose what you find best. You can also do it without any app but you would have to root your iPad which I don't recommend. If you ever forget your apple id password you can see read this article here: https://mactechnicalsupportnumbers.com/blog/how-to-reset-forgotten-apple-id-password/
There are a lot of apps for this purpose. There are also apps to password protect your app, files, phone, photos, videos etc. You can just search online and choose what you find best. You can also do it without any app but you would have to root your iPad which I don't recommend. If you ever forget your apple id password you can see read this article here: https://mactechnicalsupportnumbers.com/blog/how-to-reset-forgotten-apple-id-password/