What app ads are, and where they run
An app ad is any paid placement whose job is to get your app opened or installed. The ones most indie developers buy are app install ads on TikTok, Meta (Instagram and Facebook), Google (search, YouTube and its partner apps) and Snapchat. Apple Search Ads also promote apps, but inside the App Store search results and without a video you make; this guide is about the video ads you produce for social feeds.
Why app install ads are mostly video
An app is something people do, not something they look at. A static image can show the icon and a claim; a short video can show the problem, the tap and the result in the time it takes to scroll past. That is why vertical video is the default format for app install ads on TikTok, Reels and Shorts, with square or 4:5 versions for feeds.
The shape of a good app ad: problem, real screens, install
- The problem (first seconds). Say or show the moment your user knows well. A person reacting to camera, a line of text that reads like their own thought, or the messy "before" screen.
- Two or three real screens. The app doing the job, in a phone frame or full-screen, large enough to read. One idea per shot, each with a caption.
- The install ask. The app icon, its name and one call to action, held long enough to read and placed inside the platform's safe zone.
If the ad opens with a person, it is a UGC-style ad. If it opens with the screen, it is closer to a product demo video cut short. Both work; test both.
Turning screenshots and a screen recording into an app promo video
- Record the app. On a Mac, run your iPhone app in the iOS Simulator and record it with
xcrun simctl io booted recordVideo demo.mov, or connect an iPhone and record it with QuickTime Player. Short takes are easier to cut than one long session. - Use the screenshots you already have. Your App Store screenshots are designed to be read at a glance. Framed in a phone on a brand-coloured background, with a slow zoom, they make good proof shots.
- Cut to the line, not to the footage. Each shot lasts as long as the sentence that explains it, and no longer.
ClipForge frames screenshots and recordings in a phone on your brand gradient, adds slow zooms, and cuts to the beat of the music. Its Claude / MCP connection (Premium) can draft the whole ad from your app's name, pitch and screenshots; you finish it on the timeline.
Captions, voiceover and sound for app ads
Feeds autoplay muted, so every line must be on screen. A voiceover still helps the viewers who turn the sound on, and a text-to-speech voice means you can rewrite the script without re-recording. Keep music under the voice and use a sound effect on the reveal of the result. See auto captions on Mac and text-to-speech voiceover on Mac.
Sizes for app ads on TikTok, Meta and YouTube
| Placement | Shape to export |
|---|---|
| TikTok in-feed | 9:16 vertical |
| Instagram and Facebook Reels and Stories | 9:16 vertical |
| Instagram and Facebook feed | 4:5 (or square) |
| YouTube Shorts | 9:16 vertical |
| YouTube in-stream | 16:9 horizontal |
Networks change their limits and safe areas; check the current ad specs of each before you upload. An App Store preview is a separate deliverable with its own rules and sizes: see App Store preview video specs.
Testing app ads: make variations, not one masterpiece
The ad that wins is rarely the one you expected. Keep the proof and the install ask, and change one thing at a time: the hook, the first line of text, the voice, the order of the screens. Several cheap variations tell you more than one expensive ad. Because ClipForge keeps one master project per ad and exports every format from it, a new variation is a new hook on the same timeline.
Making an app ad in ClipForge
- Import your screen recording and screenshots, and set your brand colour.
- Lay out problem, screens and install ask; frame the screens in a phone if you like.
- Add a text-to-speech voiceover and generate captions; both run on your Mac.
- Add music and sound effects, ducked under the voice.
- Preview TikTok, Reels, Shorts, feed and YouTube formats, then export them all.
The editor is free on the Mac App Store. Premium adds the UGC hook library, the full music and sound-effects libraries and the Claude / MCP connection. More on the video ad maker page.
Questions
What are app install ads?
Paid ads whose goal is a download: the call to action opens the app's store page. TikTok, Meta (Facebook and Instagram), Google (including YouTube) and Snapchat all sell them, and most of the inventory is short vertical video.
How long should an app ad be?
Usually short: the problem, two or three real screens and the install ask fit in well under thirty seconds. What matters most is the first few seconds, because that is where most viewers decide to stay or scroll. Check each network's limits for the placement you buy.
Can I use my App Store preview video as an ad?
You can reuse the footage, but the two have different rules. An App Store preview may only show screen captures of the app, while an ad can open with a person on camera, a phone mockup or a bold claim. Most apps cut a separate ad from the same recordings.
Do app ads need a person on camera?
No. Many app ads are built only from screen recordings, text and a voiceover. A short clip of a person reacting or talking to camera often makes a stronger hook, which is why UGC-style app ads are common.
What should the first seconds of an app ad show?
The problem your app solves, in a form the viewer recognises at a glance: the annoying moment, the question they ask themselves, or the result they want. Logos and splash screens in the first seconds give them a reason to scroll.