AI video app for iPhone

Star in any video you scroll past.

Share a dance, a trend or a funny clip to SynthGen, add one photo of yourself, and get the same video back starring you. Same moves, same timing, same sound.

Scan to get the appPoint your iPhone camera here
A dancer in a black outfit on the left, a selfie of a young woman in the middle, and the same dance performed by her on the right.OriginalYou
Concept illustration with fictional people

How it works

From scroll
to starring.

  1. 01

    Share it to SynthGen

    See a video you wish you were in? Tap Share, then SynthGen. It works from TikTok, Instagram, YouTube and any app that shares videos or links. You can also paste a link or pick a video from Photos.

  2. The SynthGen start screen: the original video next to the new one, your photo, and the two modes.
    02

    Add one photo, pick a mode

    Use one clear photo of yourself and keep it for next time. Choose Swap me in or Copy the moves. The cost in credits shows before you start.

  3. The finished video playing in SynthGen, with buttons to post it to other apps.
    03

    Get it back starring you

    Tap Make it me and go back to scrolling. In about 3 to 6 minutes a notification says your video is ready. Save it to Photos or post it anywhere.

Two versions of the same dance: one in the original studio, one in the dancer's own living room.

Two modes

Two ways to be in the video.

A

Swap me in

Keep the original scene and swap the person for you.

The background, the lighting, the camera moves and the sound stay exactly as they were in the original. Only the person changes: it becomes you, built from your photo.

Best for
Trends where the place matters: a stage, a street, a party, a famous backdrop.
AI model
Wan 2.2 Animate (Alibaba Tongyi Lab), run on Replicate
B

Copy the moves

Bring your own photo to life with the same moves.

Your photo becomes the scene. You keep your outfit and your background, and you perform the exact moves, timing and gestures of the original video, with its sound.

Best for
Dances and challenges where you want to look like yourself, in your own space.
AI model
Kling motion control (Kuaishou), run on Replicate

Not sure which one to pick? Read the side by side guide

Pick the right clip

Great results start with the clip.

SynthGen works on any video, but some videos work much better. Five things make the difference. More tips

  1. 01

    One person

    The AI follows one body. Group shots, crowds in focus and duets confuse it.

  2. 02

    Whole body in view

    Head to feet works best. Moves that leave the frame come back blurry.

  3. 03

    One continuous shot

    Pick clips without cuts. The motion stops where the original video cuts to a new shot.

  4. 04

    3 to 30 seconds

    Short clips finish faster. Anything longer uses the first 30 seconds.

  5. 05

    A clear photo of you

    Face forward, good light, nothing covering your face. A full-body photo helps Copy the moves.

At a glance

SynthGen AI,
the short version.

What it does
Remakes a short video with you in it, from one photo of yourself
Platform
iPhone app, iOS 18 or later
Where videos come from
The iOS share sheet in TikTok, Instagram, YouTube and other apps, a pasted link, or your Photos library
What you add
One photo of yourself
Modes
Swap me in (keeps the original scene) and Copy the moves (animates your own photo)
AI models
Wan 2.2 Animate and Kling motion control, run on Replicate
Clip length
3 to 30 seconds (longer clips use the first 30 seconds)
Output
720p video with the original sound, no SynthGen watermark
Time to result
Usually 3 to 6 minutes, with a notification when it is ready
Plans
SynthGen Pro subscription with monthly credits. Cost is based on video length and shown before you start. Failed videos are refunded automatically.
Privacy
Photos are never sold or used to train AI models, and you can delete them at any time
Age rating
13+
Languages
English, French, German, Spanish, Portuguese, Japanese and Simplified Chinese
Developer
Neurit Software Szolgaltato Kft. (Hungary)

FAQ

Questions, answered.

Something else? Write to balint245@gmail.com

What is SynthGen AI?

SynthGen AI is an iPhone app that remakes short videos with you in them. You share a video you like, add one photo of yourself, and the app returns the same video starring you, with the same moves, timing and sound.

How do I put myself in a TikTok or Instagram video?

Open the video in TikTok, Instagram or YouTube, tap Share, then choose SynthGen. You can also copy the link and paste it in the app, or pick a saved video from Photos. Add a photo of yourself, choose Swap me in or Copy the moves, and tap Make it me.

How long does it take?

Usually 3 to 6 minutes. You can close the app while it works. SynthGen sends a notification when your video is ready.

What is the difference between Swap me in and Copy the moves?

Swap me in keeps the original scene, lighting and camera, and replaces the person with you. Copy the moves keeps your photo as the scene and makes you perform the same moves. Swap me in uses Wan 2.2 Animate, Copy the moves uses Kling motion control.

Which videos work best?

Clips of 3 to 30 seconds with one person, fully in view, filmed in one continuous shot. Videos with cuts, several people or heavy effects give weaker results.

Is SynthGen AI free?

No. SynthGen AI works with a SynthGen Pro subscription that adds credits every month, and you can buy extra credit packs. Each video costs credits based on its length, the cost is shown before you start, and credits for a failed video come back automatically.

Is there an Android or web version?

Not yet. SynthGen AI is available for iPhone on the App Store.

Does the finished video have a watermark?

SynthGen does not add a watermark. You can save the video to Photos or post it straight to TikTok, Instagram, YouTube or any other app.

What happens to my photo?

Your photo is used only to make the videos you ask for. It is sent to the AI provider (Replicate) for processing, never sold, never used to train AI models, and you can delete it in the app at any time. Deleting your account removes your photos and videos.

Can I use a photo of someone else?

Only with their clear permission. SynthGen's terms require you to use photos of yourself or of adults who agreed to it, and forbid making videos that impersonate or embarrass anyone.

Your turn.

Find a video you love. Share it to SynthGen. Be in it a few minutes later.

Download SynthGen AI on the App Store

Scan with your iPhone camera