Ultramock vs Shots.so

What each one is actually for

Shots.so is a preset engine. You bring a screenshot, choose a device frame and a background from a large library, and it hands back a good-looking image. The whole design of the product is about removing decisions, and it does that well: it is genuinely hard to make something ugly in it, and for a changelog image or a social post that is the right trade.

Ultramock is a renderer. Your screenshot becomes a texture on real device geometry, that geometry sits in a lit 3D environment, and the frame you see is drawn in WebGL on your own machine every time you move a control. Nothing is pre-baked, which is the reason it can do things a preset library structurally cannot, and also the reason it asks slightly more of you.

The honest way to choose between them is to ask what the image is for. A screenshot that supports a sentence in a blog post does not need cast shadows. A hero image at the top of a landing page, or a fifteen-second launch clip, does.

Rendering: composited versus lit

This is the difference everything else follows from.

In a preset-driven tool, the device is artwork. The reflection on the glass, the shadow beneath it and the highlight along the edge were drawn once by whoever made the frame, and they stay the same however you rotate it. That is fine, until the pose no longer matches the lighting, which is when a mockup starts to read as a sticker on a background rather than an object in a room.

Ultramock lights the device instead. A small offscreen scene of emissive panels (an overhead softbox, side fills, a rim) is baked into an environment map every time the scene changes, and every material in the frame samples it. That is why the chamfer on a phone catches a highlight that moves when you rotate it, and why the screen picks up a faint reflection of the backdrop. Underneath, a spotlight casts a real, soft-filtered shadow, and the device is clamped to the floor so it can never sink through it.

The last piece is tone mapping. Ultramock renders in high dynamic range and maps it to the display with an ACES filmic curve, so a bright reflection rolls off into white the way film does instead of clipping to a flat patch. It is a small thing to describe and the single most obvious one in a side-by-side.

Photorealism: the details that sell it

Three effects do most of the work of making a render read as a photograph, and Ultramock exposes all three as live parameters.

Depth of field. Not a background blur slider, but a focus point you place, a focus size that controls how quickly sharpness falls away, and blur modes including a tilt-shift band and a directional blur. Focus is the most reliable cue that a lens was involved, because software mockups almost never have it.

Grain. Digital renders are too clean. A small amount of tunable grain across the whole frame, rather than over the device alone, puts everything on the same surface and stops the composite reading as layers.

Bloom. Threshold, strength and radius, applied to the parts of the frame that are actually bright. Bright UI elements bleed slightly, the way they do through a real lens.

Each of these is a slider, each redraws instantly, and each is animatable, as you will see below.

Animation: keyframes, not a preset move

Ultramock has a timeline. You pose the camera, drop a keyframe, move to another point in time, pose it again, and it eases between them. Each segment gets its own ease-in-out, so a three-keyframe move settles at every stop rather than sliding through at a constant speed.

What travels along that track is not just the camera. Tilt, pan, zoom, field of view, blur strength and focus position, bloom, grain and vignette all interpolate, which means a rack focus (the shot pulling focus from the background onto the screen) is two keyframes rather than an effect you have to fake in an editor afterwards.

Export is MP4, up to 60fps, in landscape, square or vertical, with motion blur accumulated from four sub-frames on a 180° shutter so fast moves smear like footage instead of strobing. And if your content is a screen recording rather than a still, it plays inside the device while the camera moves around it.

Shots.so has short animated exports. It does not have a timeline, and that is a category difference rather than a feature gap: a preset move is a template, and a keyframe track is a tool.

Where Shots.so is the better pick

It would be dishonest to write this page without saying it plainly. If you need one screenshot, on brand, in the next two minutes, a preset library beats a renderer. Ultramock gives you a six-axis camera and a stack of live effects, and there are days when that is exactly what you did not want to be handed.

Shots.so is also the easier tool to hand to someone who does not want to think about lighting, and for a run of twenty near-identical framed screens the preset approach is simply less work.

Moving across

There is nothing to migrate. Both run in the browser, both take a PNG or a screen recording as input, and Ultramock does not require an account to start. Open the editor, drop your screenshot on it, and you will know inside a minute whether the render is worth the extra controls.