It's definitely a good idea, and an easy way of taking notes from a screen in situations where copy-paste is not available. Or from oscilloscopes or other instruments. Just one thing to beware if your phone is synced to Google Photos:
> ""By submitting, posting or displaying the content you give Google a perpetual, irrevocable, worldwide, royalty-free, and non-exclusive license to reproduce, adapt, modify, translate, publish, publicly perform, publicly display and distribute any Content which you submit, post or display on or through, the Services.""
> ""By submitting, posting or displaying the content you give Google a perpetual, irrevocable, worldwide, royalty-free, and non-exclusive license to reproduce, adapt, modify, translate, publish, publicly perform, publicly display and distribute any Content which you submit, post or display on or through, the Services.""