For the user’s proficient use any of the third-party app, developer design most of the app with auto sync or access camera album within the device automatically. As of my personal experience on that, 4 out of 5 applications must use your photo album and all the picture/ Video. Some popular apps names are instagram, Twitter, Snapchat, Facebook, WhatsApp, DropBox, Scanner app, Image Editing apps act. In that case, you don’t have a trust about the security then you can manage that buy stop to access photo by apps in iPhone, iPad or iPod Touch.
In alternate way you can set different levels of restriction, like temporary disabled or Pass code protected restriction. Follow the below guide on disallow or allow app to access photos.
Stop to access photo by apps in iPhone, iPad, iPod Touch: iOS 9
#1 Go to the Settings app on iPhone/ iPad/ iPod Touch.
Enter Security passcode for make changes on restrictions.
#3 Scroll down screen for the privacy section.
You are done, Restriction automatically applied for the selected app.
Note: Also set restriction about no one can change restriction settings using second way – without passcode. Choose Don’t allow changes under Settings > General > Restriction > Passcode > Don’t Changes. This option also useful on set preset restriction for new app will be install on iOS device.
Second Way: Without enter passcode
Go to the Settings > Privacy > Photos > Disable toggle for Stop to access photo by apps in iPhone.
For all the third party apps running on your iOS device, above both the method works for Stop to access photo by apps in iPhone, iPad or iPod Touch.