Videos
App promo video maker
App store video is the most tightly specified format in this list, and the two big stores specify it differently. One enforces a hard fifteen to thirty second window and accepts nothing but screen captures of the app itself. The other wants the first ten seconds to be genuine in-app experience and most of the runtime to be representative.

The two rulebooks
One store enforces fifteen to thirty seconds outright and rejects anything outside it, allows up to three previews per localisation per device family, defaults the poster frame to the five second mark, and requires the preview be made of screen captures of the app itself, which rules out hands, devices held by people and over the shoulder angles. The other takes a single video entered as a public or unlisted link, requires the first ten seconds to be actual in-app experience and at least eighty percent of the runtime to be representative, and autoplays only the first thirty seconds.
The five second frame has to stand alone
Because one store's poster frame defaults to five seconds in, whatever is on screen at that moment is the still image many people will judge the app on. That is a design constraint, not a detail. It means the beat at five seconds should be a clean, readable screen showing the app doing its most valuable thing, not a transition, not a wipe, and definitely not a logo.
Not the onboarding, and not the splash
Both stores say a version of this. One requires the app be shown in use rather than as title art, a login page or a splash screen. The other explicitly wants real in-app experience up front. So the sign up flow, the permissions prompts and the welcome carousel are all the wrong opening even though they are chronologically first. Open on the screen that shows the value and leave onboarding out entirely.
The things neither store will take
Prices and currency, seasonal references, names or imagery of rival mobile platforms and marketplaces, unlicensed music, film or character content including in the background, and metadata that would not pass a four plus age rating even for an app rated higher. The other store separately bans user testimonials, claims about store performance or ranking, promotional wording and install now style calls to action. That list rules out most of what a paid acquisition creative is made of, which is why store previews and paid ads are two different edits.
How it works, in three steps
Step 1
Capture the app screens yourself
Screenshots of the app in use are the material. One store accepts only captures of the app, so a filmed phone in a hand is not an option there.
Step 2
Build to the shorter window
Short length here gives three to six scenes, which at promo pacing lands inside the fifteen to thirty second range one store enforces.
Step 3
Check what is on screen at five seconds
Scrub the preview to the five second mark and look at the frame. That is the poster image, and it should read as a still.
The full walkthrough with screenshots is in the guide Make a promo video with AI voiceover.
Limits worth knowing
- Exports are 30 frames a second at 1920 by 1080 or 1080 by 1920, or double that on the Ultra option.
- There is no device frame mockup wrapper applied automatically. Some scene layouts draw a phone frame, and others show the screenshot full bleed.
- Captions are burned in, and store previews with baked text still have to pass the store's own metadata rules.
- This produces one video. Localised previews per language mean building one per language, since narration and on-screen copy are both written in the language you set.
Questions people ask
Can I use the same video as a paid ad?
No, and trying to is the common mistake. The store preview bans prices, calls to action, testimonials and people holding devices, which are exactly the elements paid social creative relies on. Build two.
How long should the paid version be?
Longer than the store preview. One platform's own analysis of app install creative found substantially better conversion in the twenty one to thirty four second band, with full screen vertical and a text call to action both adding materially.
Does it need sound?
Store previews are frequently watched muted and one store's guidance is built around the video being comprehensible without it. Burned in captions here mean the narration is a bonus rather than a dependency.
Can I show a competitor's platform?
One store explicitly bans names, icons and imagery of other mobile platforms and marketplaces in a preview. So no rival store badges, no rival OS logos and no side by side against another platform.
Make your own video
The button opens the generator with this use case already described. Change the wording to match yours, generate, then edit anything you like.
Create a video with OneCraftRelated pages
Vertical video maker
If you only make one vertical file, it has to survive four different sets of interface furniture. Each platform covers a different part of the frame, so the design target is not any one safe zone, it is the union of all of them, and that union is a smaller box than most people expect.
TikTok video maker
TikTok is the one surface where the interface eats the most of your frame. The right rail of buttons, the caption block, the music ticker and the nav bar together claim a large part of a 1080 by 1920 canvas, and TikTok deliberately does not publish a single number for it because the zone changes with your caption length.
YouTube Shorts maker
Shorts is the only one of these formats defined by a rule rather than a placement. Upload something square or taller that runs three minutes or less and YouTube classifies it as a Short automatically. Go wider than 1:1 and it becomes an ordinary video on your channel instead.
More finished work of this kind is on the video examples hub.