MeCamDouble exposure on iPhone
A double exposure puts two pictures in one frame. With MeCam you do not have to guess how they will mix: the first shot is laid over the live viewfinder, so you line up the second one before you press.
How to shoot one
Open the menu and tap Double. Press the shutter once: a badge shows Shot 1 of 2 and the first picture stays over the viewfinder. Move the iPhone until the two fit together, then press again. MeCam saves one photo with both shots blended.
Changed your mind after the first shot? Tap the × next to the badge to discard it and start over. Tap Double again to switch the mode off.
How the two shots blend
The pictures are blended like light: the bright parts of either shot show through, and the dark parts let the other shot shine. So the dark areas of your first picture are the windows for the second one.
That is why two bright, busy scenes wash out towards white, while a dark shape with a lively scene inside it looks rich.
Pairs that work
A dark silhouette against a bright sky, then trees, a brick wall or city lights for the second shot, so the texture fills the shape. A portrait against a dark background, then flowers or neon signs. Night lights over a face turned to the side. The same person twice, in two poses on a plain wall.
Keep one of the two shots simple and the other full of detail. Light on a plain dark area is what you will see in the final photo.
Choose the film
Each shot goes through the film you have selected, and you can switch film between the two presses. If the films differ, both names are saved with the photo. Black and white films such as Noir 3200 and Classic BW keep a double exposure clean, because only brightness is mixing; colour films like Neon 500T add colour to the blend.
Good to know
Double exposure and Half-frame are two-press modes, and only one can be on at a time. If you leave the app after the first shot, MeCam saves that shot on its own so nothing is lost. The mode is not in the Lock Screen camera.
It is free, with no ads and no account, and the blend is made on your iPhone.