Ultramock vs Rotato

The one real difference

Rotato and Ultramock are on the same side of the important line: both put your screen on real geometry and light it, rather than compositing it onto a picture of a phone. That is rarer than it sounds, and it is why these two get compared to each other rather than to the preset generators.

Where they diverge is the shape of the product. Ultramock is designed around one browser workflow. Rotato's fullest experience is its native macOS app, with a separately licensed web version for other desktops.

The native app gives Rotato an offline workflow, USB iPhone mirroring and professional export codecs. Its 30+ device catalogue is also substantially larger. Ultramock's browser workflow opens on a modern desktop without an install or account, so you can move from a screen to a live composition on the machine already in front of you.

Live rendering, and what it changes

Ultramock's viewport is the renderer. Every control (camera, lighting, depth of field, bloom, grain) redraws the WebGL frame immediately, and that frame is what exports. There is no preview quality and final quality, and nothing to sit and wait for between a change and its result.

That sounds like a performance note and it is really a workflow one. When adjusting focus costs nothing, you adjust focus. When it costs a render, you guess, and you stop at the first result that is good enough. The tools that feel best to work in are the ones where the feedback loop is short enough to be exploratory, and running on your own GPU in a browser tab is a short loop.

Lighting and photorealism

Ultramock builds its environment map from the scene itself. A small offscreen sub-scene of emissive panels (an overhead softbox, side fills, a rim light) is baked to a prefiltered cubemap whenever the environment changes, and every material in the frame samples it. So the chamfer on a phone catches a highlight that moves when you rotate the device, and the screen picks up a faint reflection of the backdrop behind it. A spotlight casts the soft grounding shadow underneath, and the device is clamped to the floor so it cannot sink through it at any pose.

Everything renders in high dynamic range and is mapped to the display through an ACES filmic curve, with exposure exposed as a control. That is what stops a bright reflection clipping into a flat white patch. It rolls off instead, which is the single most reliable tell between a render and a photograph.

On top of that sits the effects stack, and this is where Ultramock is genuinely deeper: depth of field with a focus point you place, a focus size, and tilt-shift band and directional blur modes; bloom with threshold, strength and radius; grain and vignette across the whole frame. All of them live, all of them keyframable.

Animation

Both tools keyframe. The difference is emphasis.

Rotato ships an extensive library of ready-made moves, which is the faster path to a decent clip and the reason a lot of people bought it. Ultramock gives you the track: pose the camera, drop a keyframe, move along the timeline, pose it again. Each segment eases in and out independently, so a three-stop move settles at every stop instead of gliding through the middle one.

What matters more than the camera is what else rides that track. Blur strength, focus position and focus size, bloom, grain and vignette all interpolate between keyframes. A rack focus (the shot pulling focus off the background and onto the screen as the camera settles) is two keyframes, not a round trip through a video editor. Pro video output reaches 60fps in landscape, square and portrait compositions, with export motion blur available for fast moves.

Where Rotato is the better pick

Three cases, and they are not close.

You need a device Ultramock does not model. Ultramock has a focused library of 16 device models. Rotato lists more than 30, including a broader range of Android and older Apple hardware. If the shot has to feature a specific handset, the catalogue may decide it.

You want capture and composition in one place. Rotato records your screen itself. Ultramock takes a recording you already have.

You need ProRes output. Rotato's Mac plans include professional formats such as ProRes 4444. Ultramock Pro offers high-resolution video plus transparent WebM and PNG-sequence output, but does not present itself as a ProRes workflow.

Where Ultramock is the better pick

You want one browser workflow. Ultramock uses the same focused editor across macOS, Windows, Linux and ChromeOS. Rotato offers a web product too, but licenses it separately from the native Mac app.

You do not want to install anything. Open the editor, drop a screenshot on it, and it renders. No download, no licence, no account before you can see the output.

You want the effects, not the presets. The live depth-of-field modes, bloom controls, grain and the fact that all of them keyframe give you more room to art direct a shot than a preset move does.

You want to try before paying. Ultramock's Free plan includes the core creative editor, basic 3D models and limited exports. Pro is $12 monthly or $96 annually, adding watermark-free high-resolution exports, premium assets, cloud projects and MCP control.