You finish a three minute walkthrough, watch it back, and the circle bubble in the corner has been sitting on top of your app’s tab bar the whole time. Or worse, it cropped your chin off because you drifted six inches to the left while talking. The recording is fine. The frame inside the frame is not.
Short answer: In face cam overlay recording, the camera shape should match how much of you needs to be visible. Use a circle for talking-head commentary, a vertical rectangle when you gesture or move, and a horizontal rectangle for wide product shots. DemoScope on iPhone and iPad offers circle, square, vertical, and horizontal shapes, all draggable and pinch-resizable.
What the camera shape actually controls
A face cam shape is the crop applied to your front camera feed before it gets composited onto the screen recording. It works by masking the camera frame to a fixed outline, so anything outside that outline is cut from the final video. Changing the shape does not zoom the camera, it changes how much horizontal and vertical headroom you get at a given bubble size.
That distinction matters more than it sounds. A circle and a square set to the same width show different amounts of your shoulders. A vertical rectangle at the same width shows more of your torso and gives you room to move up and down without leaving frame. If you talk with your hands, a circle will clip them almost every time.
In DemoScope, the shape is a setting on the camera bubble, alongside position (drag to any corner) and size (pinch to zoom). The bubble is a live picture-in-picture overlay, so what you see while recording is what ends up in the exported MP4.
Shape by shape, and what each one is actually good at
| Shape | Best for | Screen area covered | Main risk |
|---|---|---|---|
| Circle | Talking-head narration, tutorials where the screen is the star | Smallest footprint at a given width | Clips hands and shoulders; no room to drift |
| Square | General demos, App Store preview supporting footage | Slightly more than a circle | Reads as “webcam default,” less distinct |
| Vertical rectangle | Creators who gesture, move, or stand while recording | Tall footprint, can cover a sidebar or list column | Eats vertical space in portrait recordings |
| Horizontal rectangle | Showing a product in hand, two people, or a desk setup | Wide footprint, tends to block toolbars | Cuts off the top of your head if placed badly |
My recommendation, with the trade-off stated plainly: use the vertical rectangle as your default for portrait app demos. It costs you more screen real estate than a circle, and you will have to be deliberate about which corner it lives in, but it is the only shape that tolerates you moving around mid take. Most retakes I have had to do on phone recordings were not audio problems or tap mistakes, they were “my face left the bubble” problems. A taller crop mostly solves that.
Use the circle when the screen content is dense and every pixel matters, and accept that you need to sit still.
If you are still deciding where the bubble goes at all, the follow-up: where to put the face cam bubble in overlay recording post covers corner placement against common iOS layouts.
The 60 second setup that prevents most retakes
Do this before you hit record, not after you watch the take back:
- Open DemoScope and start a new in-app recording session.
- Set the camera shape first, before sizing. Shape changes the crop, so sizing before you pick a shape means sizing twice.
- Pinch the bubble to roughly the size you want, then make it one step smaller. Bubbles always look bigger in the exported video than they do while you are staring at your own face.
- Drag it to the corner your app content does not use. In most portrait iOS apps, that is the lower left, away from the tab bar center and the top nav.
- Do a 10 second throwaway take. Talk the way you actually talk, hands and all. Watch it back in your camera roll and check whether your head hit an edge.
- Set your touch indicator color to something that contrasts with your app’s background, then paste your script into the teleprompter if you are working from one.
Step 5 is the one people skip. Ten seconds of test footage is cheaper than re-recording a three minute walkthrough because your gesture went out of frame at 0:40.
Shape settings behave differently in External PiP mode
External PiP is DemoScope’s system-wide recording mode. It activates a floating face cam window, sends DemoScope to the background, and records across every app on your iPhone using an iOS Broadcast Extension. That is how you record Safari, Settings, another developer’s app, or anything else with your face visible.
The trade-off is documented and real: External PiP mode has no touch indicators and no teleprompter, because those are drawn by DemoScope and DemoScope is not the foreground app. Your tool set in External PiP is limited to Camera, PiP Border, and Text on screen, and you use the system recording controls rather than DemoScope’s HUD.
| In-app recording | External PiP recording | |
|---|---|---|
| Camera shape and position | Yes | Yes |
| Touch indicators | Yes | No |
| Teleprompter | Yes | No |
| PiP border customization | Yes | Yes |
| Text on screen | Yes | Yes |
| Records other apps | No | Yes |
Practical consequence for shape choice: in External PiP mode you have no teleprompter, so you are either improvising or reading from a second device. Improvising means moving more, which means a larger or taller bubble. Plan for that before you send DemoScope to the background.
When a face cam overlay is the wrong call
Not every recording needs your face in it. Skip the overlay when:
- You are filing a bug report where the exact pixel state of the screen is the evidence. Cover nothing.
- You are capturing footage destined for an App Store preview video. Apple’s preview format is about the app, and a bubble in the corner competes with it.
- You are recording a dense settings screen or a data table where every corner has content.
- The video is under 15 seconds. There is not enough time for a face to build any connection, and the bubble just adds clutter.
For everything else, especially tutorials and launch demos, the overlay earns its space. The reason mobile handles this better than desktop capture is covered in face cam overlay recording: why mobile works better than desktop.
A short decision checklist
Run these four questions before recording:
- Do I move or gesture while talking? Yes means vertical rectangle.
- Is my screen content edge to edge? Yes means circle, smallest size, and sit still.
- Am I holding a physical product? Yes means horizontal rectangle.
- Am I recording another app? Yes means External PiP, and no teleprompter, so shorten the script.
DemoScope is iOS only, runs on iOS 14 and later, exports MP4 to your camera roll, and Pro is a $19.99 one-time purchase that removes the watermark. If you are comparing it against what the iPhone already ships with, the best ios screen recorder options: built-in tools vs third-party apps breaks down where the built-in recorder stops being enough, and the ios screen recorder guide: everything you need to know for mobile recording covers the fundamentals underneath all of this.
Pick a shape, test ten seconds of it, then record the real thing.
Frequently Asked Questions
What is the best face cam shape for iPhone screen recording?
For most portrait app demos, a vertical rectangle is the safest default because it gives you vertical headroom to move without leaving frame. A circle works well when your screen content is dense and you can stay still. DemoScope supports circle, square, vertical rectangle, and horizontal rectangle, and the bubble is draggable and pinch-resizable during setup.
Can I change the face cam shape while recording?
Plan to set the shape before you start. Changing the crop mid take shows up in the exported video as a visible jump, and since DemoScope has no video editing (no trimming, cutting, or cropping), you cannot clean it up afterward. Do a short test take first, confirm the framing, then record.
Does the face cam overlay work when recording other apps?
Yes. DemoScope’s External PiP mode activates a floating face cam window, sends DemoScope to the background, and records your screen across all apps using an iOS Broadcast Extension. The limitation is that External PiP mode does not support touch indicators or the teleprompter. Your available tools there are Camera, PiP Border, and Text on screen.
How much does it cost to remove the watermark?
DemoScope Pro is $19.99 as a one-time purchase, not a subscription. The free tier records with a watermark so you can test the face cam overlay recording workflow before paying. There is no free trial of Pro, so the free tier is the trial.
Can I blur or replace the background behind my face cam?
No. DemoScope has no green screen, background removal, filters, or face effects. The camera bubble shows your front-facing camera as it is, which means the practical fix is to record against a wall or a tidy corner rather than expecting software to handle it.