Gemini (Nano Banana)
Gemini is not sold as a baby generator, but Google's Nano Banana image models are among the best at keeping faces recognisable, so they give the most natural-looking results of the tools here, and the free tier is enough for a few tries. Upload one clear, front-facing photo of each parent and ask for "a realistic photo of a baby about nine months old who blends the features of these two people". Ask again and you get a different child, which is a useful reminder that this is not a forecast. You can also set the age, outfit and background yourself.
Privacy is the catch. With Keep Activity on (the default), Google keeps your chats, including the photos in them, until they auto-delete after 18 months, and a sample of chats is read by human reviewers and kept for up to three years. Turn Keep Activity off before you upload and Google says new chats are kept for 72 hours.
Pick it if you want the best result for free and are happy to change one setting first. Skip it if you want a one-tap app with preset options.
Score breakdown
Key facts
- Pricing
- Free; Google AI Plus $4.99/mo (The free tier has a limited image allowance. Google AI Plus ($4.99/month) and AI Pro ($19.99/month) raise it. US prices.)
- Free option
- Yes
- Platforms
- Web, iOS, Android
- Default retention
- Activity auto-deletes after 18 months (3 or 36 months optional)
- Keep Activity off
- Chats kept for 72 hours (Google)
- Human review
- A sample of chats is reviewed and kept up to 3 years
- Input
- One photo of each parent plus a text prompt
What we like
- Most natural, detailed baby faces
- Free to try
- Full control over age, outfit and scene
- Clear, documented privacy settings
Watch out for
- Keeps activity for 18 months by default
- Human reviewers may see a sample of chats
- You write the prompt yourself