Open Snapseed App (available on Android and iPhone),
hit + and add your image you'd like to edit.
Go to Tools -> Double Exposure
Hit add an image.
Hit 'Blending Mode' and choose 'Overlay'.
Adjust the Opacity if needed.
Hit tick to apply.
If you want to erase the overlay, e.g. on your face - go to 'View Edits', choose your double exposure edit and pick a brush.
Using a Mask, apply a zero of double exposure on the areas you'd like to erase.
And that's it!
You can also just adjust highlights of your image in tools to develop the effect and remove that brightness excess.
You can also use Pixart App to do the same thing, it is slightly easier to reposition the overlay and to erase /draw the layer there, but ads are annoying :)
You can also download my own royalty-free overlays I've created for you guys just to thank you for reading my blog and checking out my Instagram.
Follow me if you think it was useful and tag me @inna_tevi if you used my tutorials and any of my overlays!