Overlayd is a super simple app to add watermark. Especially on sensitive images/photos such as identity card.
Offline first, you can use Overlayd without any internet connections. This app also doesnt collect your data or upload photos/images somewhere else.
To add watermark, simply:
1. Select photos
2. Add your watermark text on the provided text field
3. Set the position and opacity of the text, tap Save.
Easy, right?