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Show HN: 200+ Likes/day as fake profile → built my own dating app in 100 days

https://www.wctokyoseoul.com/ko
2•vulcanidic•2h ago
Hello HN, I'm a long-time iOS developer (since the iPhone 3GS era). Recently, I solo-built and launched a global dating app using Flutter, Supabase, and Next.js – all in about 100 days, heavily relying on Cursor's Pro plan ($20/mo).

While AI tools like Cursor make rapid development possible, I wanted to share some practical realities from the engineering side and the economics of building with them.

1. Market Validation Experiment (Why a dating app?)

Before coding, I tested the market by creating a female profile on an existing major dating app, using lightly AI-edited photos.

- Day 1: 200+ likes, and it continued strongly for a week.

- Rough math: If each like represents ~$1 in potential revenue for the platform, that's over $1,000 in a week from a single profile photo.

- Reality: This convinced me the market was huge, but launching my own app showed the challenge – great functionality isn't enough without network effects and brand. It's a quiet launch so far.

2. Cursor's Economics (The changing value)

In the first few months, the Pro plan delivered tremendous value. Thanks to unlimited Auto Mode, my actual usage was worth over $1,000/month – while the bill was only $20/month.

It felt like working with a team of 10+ developers. Tasks that would normally take me a week were often completed in a minute. It was exhilarating, but over time it became exhausting. As a human, keeping up with AI's pace drained me mentally.

Starting around month 4, I started hitting usage limits much faster (e.g., exhausting monthly compute credits in days on heavier tasks). Cursor has shifted to a compute-based usage pool (equivalent to ~$20 of API credits per month), with overages if you go beyond. It's a reminder that these tools' "unlimited" phases can evolve as models get more expensive.

The analogy to a "drug dealer" model fits in the sense that early generous access builds dependency, then costs adjust – fair for sustainability, but something to budget for.

3. Engineering Challenges (Where AI helps – and where it doesn't)

AI handled a lot of boilerplate, but integration details required manual work.

- SSO (Google Login): Always tricky; issues like browsers not closing or missing callbacks. Supabase Auth made it manageable compared to past experiences – sticking closely to official docs was key.

- Notifications: Firebase/Google Cloud consoles are still confusing. Choosing OneSignal for the backend simplified things a lot and was a solid decision.

- IAP: The 30% cut (15% for smaller devs) is steep with no real alternatives yet. Planning local payment gateways later.

- Translation: I implemented on-demand translation (button-press like LinkedIn). Then saw some competitors (e.g., Chinese apps) with seamless real-time translation across full content – impressive tech gap, and a reminder there are always advanced implementations out there.

4. Conclusion

AI tools enabled a solo 100-day build, which felt impossible before. But building the product is one thing; getting users and traction is another – marketing/brand is the real barrier, like building a great hotel on a deserted island. Curious about others' experiences with Cursor's evolving limits or solo-launching consumer apps. Links:

App Store: https://apps.apple.com/us/app/weconnect-cultural-exchange/id...

Google Play: https://play.google.com/store/apps/details?id=com.abus.wecon...

Web: https://www.wctokyoseoul.com

High-Speed Traders Are Feuding over a Way to Save 3.2Bths of a Second

https://www.wsj.com/finance/high-speed-traders-are-feuding-over-a-way-to-save-3-2-billionths-of-a...
1•KnuthIsGod•1m ago•0 comments

Show HN: brig – a devcontainer CLI in Go

https://github.com/nlsantos/brig
1•nsantos•1m ago•0 comments

Geometric-Constraint-Solver: A Simple Geometric Constraint Solver

https://github.com/kasznar/geometric-constraint-solver
1•thunderbong•6m ago•0 comments

Show HN: Seedance 1.5 Pro – Native Audio-Visual AI Video Generation

https://www.jxp.com/seedance/seedance-1-5
1•lu794377•6m ago•0 comments

Training Day Press Conference, 2001 Tiff [video]

https://www.youtube.com/watch?v=O3cBHIi7i_Q
1•handfuloflight•8m ago•0 comments

Learn Pinyin with Games

https://www.june.kim/pinyin-chart/games/pinyin-command/
1•kimjune01•10m ago•1 comments

Trump weighs order to loosen federal marijuana restrictions

https://www.reuters.com/business/healthcare-pharmaceuticals/trump-says-he-is-considering-executiv...
1•XzetaU8•11m ago•0 comments

The Annoying Usefulness of Emacs [video]

https://www.youtube.com/watch?v=DMbrNhx2zWQ
1•chamoda•11m ago•0 comments

From Python3.8 to Python3.10: Our Journey Through a Memory Leak

https://eng.lyft.com/from-python3-8-to-python3-10-our-journey-through-a-memory-leak-1fd9b43cc01e
1•lolong20•12m ago•0 comments

Show HN: 0tH – Mach-O binary analysis tool for macOS (Rust)

https://zero-the-hero.run
1•3gnever•14m ago•0 comments

GitHub Self Hosted Action Costs Now

https://old.reddit.com/r/selfhosted/comments/1po9dft/github_self_hosted_action_costs_now/
1•LaSombra•14m ago•0 comments

Amazon in talks to invest in OpenAI, source says

https://www.reuters.com/business/retail-consumer/openai-talks-raise-least-10-billion-amazon-use-i...
1•voxadam•16m ago•0 comments

What's New in Ruby 4.0

https://nithinbekal.com/posts/ruby-4-0/
1•nithinbekal•16m ago•0 comments

Show HN: Post2X – create, score, and schedule X/LinkedIn posts in one workflow

https://post2x.com
1•moimaere•19m ago•0 comments

Making Government Cool Again

https://www.opm.gov/news/secrets-of-opm/making-government-cool-again/
1•sebazzz•21m ago•0 comments

Are There Fourth Amendment Rights in Google Search Terms?

https://reason.com/volokh/2025/12/16/are-there-fourth-amendment-rights-in-google-search-terms/
1•g-b-r•22m ago•0 comments

ML API Styles

https://github.com/apple/axlearn/blob/main/docs/ml_api_style.md
1•bobrenjc93•22m ago•0 comments

Thinking Outside The Box [dusted off draft from 2017]

https://projectzero.google/2025/12/thinking-outside-the-box.html
1•mfrw•26m ago•0 comments

Oracle's Rent Is Too Darn High

https://www.bloomberg.com/opinion/newsletters/2025-12-16/oracle-s-248-billion-rent-is-too-darn-high
1•petethomas•26m ago•0 comments

Mozilla's New CEO: It's Time to Evolve Firefox into an AI Browser

https://www.pcmag.com/news/mozillas-new-ceo-its-time-to-evolve-firefox-into-an-ai-browser
2•Buildstarted•27m ago•2 comments

Show HN: Seedance 1.5 Pro–Native Audio-Video Generation with Film-Grade Quality

https://www.seedance15.net/?i=d1d5k
1•lu794377•33m ago•0 comments

FBI investigates founder accused of using VC money to pay for house and wedding

https://www.businessinsider.com/founder-accused-using-vc-money-to-pay-for-her-house-2025-12
3•ryan_j_naughton•34m ago•0 comments

Show HN: I taught Claude Code to draw diagrams – the XML pitfalls were brutal

https://github.com/ekusiadadus/draw-mcp
1•ekusiadadus•39m ago•1 comments

Trump moves to dismantle major US climate research center (NCAR) in Colorado

https://www.usatoday.com/story/news/politics/2025/12/16/trump-dismantle-national-center-atmospher...
3•garrettdreyfus•41m ago•0 comments

Ask HN: Would you use self-hosted payments to avoid payout holds?

1•alexmccain6•42m ago•2 comments

Evaluating AI's ability to perform scientific research tasks

https://openai.com/index/frontierscience/
1•EvgeniyZh•46m ago•0 comments

We validate idea and making $1000 MRR in 4 month

https://www.indiehackers.com/post/how-we-validate-idea-and-making-1000-mrr-in-4-month-6330abd1e9
1•manobb•48m ago•0 comments

Nex-AGI DeepSeek-v3.1-Nex-N1

https://huggingface.co/nex-agi/DeepSeek-V3.1-Nex-N1
1•kristianp•49m ago•0 comments

DeepSeek v3.1 Nex N1

https://openrouter.ai/nex-agi/deepseek-v3.1-nex-n1:free
1•kristianp•50m ago•0 comments

GPT-5.2-high LMArena scores released, OpenAI falls from #6 to #13

https://lmarena.ai/leaderboard
3•reed1234•52m ago•1 comments