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Show HN: I made a picturebook app for my nephew where he is in the pictures

https://www.onceupona.ai/
1•richkuo•4h ago
Hi HN,

Went to the Luma ai hackathon.

Met a guy who vibe coded a legit app with 0 coding experience - I taught him shortcuts which was quite fun to see him 10x his Cursor productivity.

Anyway, this inspired me to vibe code something, so I made this short story generator for my nephew.

It takes a profile image, gpt-image-1's it into an avatar.

Yes I know what you are thinking, privacy! The profile image part is completely optional - you can upload pretty much any image you'd like, already avatar-ed images work great.

Then you can create stories with the avatar as the main character in all the story images.

Stories teach a lesson and moral, and are age appropriate.

Also threw in some great narration voices since I use Elevenlabs all the time.

Nephew's feedback is overwhelmingly positive, but he is 1.2 years old so...

Hoping to get feedback from folks here as well.

Stats for nerds: Built with: React Native Expo (first time using Expo - props to them for coming so far) Supabase (first time as well - love it) Elevenlabs gpt-image-1 (i tried over 5 different api's for i2i and this one is the best BY FAR)

Made with 80% Cursor, 20% by hand

Bare bones story generator MVP was done in an afternoon, more features added over 1.5 months like i2i, narration, auth, iap, etc.

First 2 stories are free (24 images), and I put 250 bucks into openai, so it should last a few days. Openai image rate limits are kinda low for my tier, so some images might not generate - if this happens, please let me know so I can add mo money to upgrade my tier.

If you encounter any issues or find a bug or have suggestions, please let me know.

Free to download in the app stores, https://www.onceupona.ai

Give a upvote on Product Hunt if you enjoyed: https://www.producthunt.com/products/once-upon-a

Thanks! Rich

How unikernels power Prisma's serverless Postgres

https://www.prisma.io/blog/cloudflare-unikernels-and-bare-metal-life-of-a-prisma-postgres-query
1•eampiart•2m ago•0 comments

HN Heatmap Highlighter Userscript

https://greasyfork.org/en/scripts/539866-hn-heatmap-highlighter
1•alex77456•2m ago•0 comments

Cybersecurity takes a big hit in new Trump executive order

https://arstechnica.com/security/2025/06/cybersecurity-take-a-big-hit-in-new-trump-executive-order/
1•derbOac•4m ago•0 comments

Mid-Evil Cats: Why Artists in the Dark Ages Made Them So Ugly (2023)

https://artrkl.com/blogs/news/mid-evil-cats-why-artists-in-the-dark-ages-made-them-so-ugly
2•antondd•7m ago•0 comments

Show HN: I made a little semantic search widget for shops to increase conversion

https://easyfinder.ai/
1•vzrowan•8m ago•0 comments

How the Brain controls ageing – and why zombie cells could be key

https://www.nature.com/articles/d41586-025-01886-3
1•rbanffy•14m ago•0 comments

The Exploration Company outlines plans for human spaceflight – SpaceNews

https://spacenews.com/the-exploration-company-outlines-plans-for-human-spaceflight/
2•rbanffy•14m ago•0 comments

Women in Semiconductors: A Critical Workforce Need

https://spectrum.ieee.org/women-in-semiconductors-workforce
1•rbanffy•16m ago•0 comments

Show HN: WFGY – A reasoning engine that repairs LLM logic without retraining

https://github.com/onestardao/WFGY
3•WFGY•16m ago•1 comments

Show HN: Compass Online

https://compassonline.app/
1•artiomyak•16m ago•0 comments

Chatterbox AI: Real-Time Voice Cloning and TTS Generator

https://chatterboxai.net/
1•gregzeng95•18m ago•0 comments

How to tackle OWASP API security risks with minimal resources

https://www.soeren.codes/articles/tackle-owasp-api-with-limited-resources
1•CER10TY•23m ago•0 comments

Van Gogh, AMD's Steam Deck APU

https://chipsandcheese.com/p/van-gogh-amds-steam-deck-apu
2•thomasjb•32m ago•0 comments

All Roads Lead to DSLRs

https://vpetersson.com/2025/06/18/all-roads-lead-to-dslrs.html
5•mvip•33m ago•0 comments

A New Obesity Pill May Burn Fat Without Suppressing Appetite

https://www.wired.com/story/new-obesity-pill-may-burn-fat-without-suppressing-appetite/
1•pseudolus•34m ago•1 comments

When AIs bargain, a less advanced agent could cost you

https://www.technologyreview.com/2025/06/17/1118910/ai-price-negotiation/
1•pseudolus•35m ago•0 comments

TROPIC01 Secure Element – Transparent, auditable secure element

https://tropicsquare.com/tropic01
2•karel-3d•36m ago•0 comments

Reinforcement Learning Algorithms Summarized

https://lossfunk.substack.com/p/reinforcement-learning-algorithms
1•paraschopra•37m ago•0 comments

Google May Charge a Fee to Provide Source Code for Android Binaries

https://source.android.com/opensourcerequest
6•jamesy0ung•41m ago•0 comments

Resources to Self-Study Communication Systems

https://www.study-from-here.com/2025/06/resources-to-self-study-communication.html
2•BhattMayurJ•42m ago•0 comments

The Reality Check Nobody Talks About: What OSS Costs

https://www.seuros.com/blog/the-reality-check-nobody-talks-about-what-oss-actually-costs/
3•seuros•42m ago•0 comments

Welcoming Payload to the Figma Team

https://www.figma.com/blog/payload-joins-figma/
1•pentagrama•43m ago•0 comments

Wheelgames

https://www.wheelgames.net/
1•tiantiankaixin•43m ago•0 comments

How to Speak to a Human at Merican Irlines: Step-by-Step Guide

https://www.chess.com/blog/willjacks12/how-to-speak-to-a-human-at-merican-irlines-step-by-step-guide
2•haffdfdf•44m ago•0 comments

On the methods of Theoretical Physics – Albert Einstein 1933 [pdf]

https://www.informationphilosopher.com/solutions/scientists/einstein/Method_of_Theoretical_Physics.pdf
1•nill0•45m ago•0 comments

Picking the Perfect Pet – Mathematical modelling [pdf]

https://www.immchallenge.org/Contests/2024/papers/2024020.pdf
1•nill0•53m ago•0 comments

Iran is going offline to prevent purported Israeli cyberattacks

https://www.theverge.com/politics/688875/iran-cutting-off-internet-israel-war
6•benkan•56m ago•1 comments

Field Notes went from side project to cult notebook

https://www.fastcompany.com/91352848/field-notes-cult-notebook-started-out-as-a-side-project
3•benkan•57m ago•0 comments

Social media now main source of news in US, research suggests

https://www.bbc.com/news/articles/c93lzyxkklpo
1•benkan•58m ago•0 comments

Show HN: Fixing AI Tool Calling Context Bloat

https://github.com/dksingh1997/Toolflow
3•Dheerajiitr•1h ago•0 comments