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TXYOU · Applied AI Studio

Production AI systems
across very different domains.

Investment research. Financial-document extraction. Ad operations.Three live products, one engineering pattern.

The model is allowed to be wrong.

The system is not allowed to be confidently wrong.

Selected work

Three production systems.

Built solo, end to end. Each carries its evidence trail, gates its own outputs, and has been deployed where being confidently wrong has a cost.

Source-traced financial intelligence, with an open funnel.

A working product-led loop in Hong Kong listed-company filing intelligence. The open-source Python SDK is one `pip install` away and good enough to extract source-traced financial facts from any HKEX annual or interim report; a free hosted tier picks up users who don’t want to run their own infrastructure; PRO adds the things research teams need at scale. Trial users arrive through the SDK and convert upward.

Underneath: every extracted fact carries its source page and bounding box; every signal passes a validator suite (accounting equation, segment-revenue reconciliation, currency/unit consistency, YoY recalculation, EPS / cash-flow sign checks); six anti-hallucination rules per signal. The model is allowed to be wrong. The system is not allowed to be confidently wrong — particularly when investment research depends on it.

Stack: Python · FastAPI · PyMuPDF / pdfplumber · multi-LLM backend · frozen JSON-Schema contracts · golden-set regression · fact-level HITL with version diff.

Research analysts · Buy-side workflows · Equity researchersVisit →

Hecang·阖仓

Multi-agent investment research, with the audit trail built in.

A unified investment workspace for households: consolidates multi-broker and multi-currency holdings (A-share / HK / US / ETF) into one audited ledger; 5 alert-rule types and 15 technical signals drive continuous monitoring; six specialist research agents plus four-dimension parallel deep-research agents (valuation / financials / technicals / position) collaborate with an editor agent that re-dispatches on conflicting findings.

Every recommendation carries its evidence trail. All write operations require human approval. Full tool-call audit log. Real capital is managed through its discipline and audit layer.

Stack: Python · multi-agent orchestration · multi-LLM backend · structured prompt + tool boundary · persistent state with version history · HITL by design.

Multi-account households · Rule-based investorsVisit →
ASA

ASAPilot

AI operations for Apple Search Ads — where most of the code refuses to act.

Specialized agents for indie devs and SMB app teams running ASA campaigns: an analytics agent turns raw ASA data into structured findings (with evidence attached, never recommendations alone); an audit agent looks for the specific failure modes that bleed money (out-of-control search-match, broken funnels, anomalous CPI spikes); an autopilot agent proposes changes through a seven-stage pipeline — every proposed action references the finding it was derived from.

A typed tool boundary is the only thing allowed to talk to the Apple Search Ads API. The LLM can reason all it wants; the only way it does anything is by calling a validated tool. Above a spend threshold, humans approve before action. Every change is logged and reversible.

Stack: Python · FastAPI · Google ADK · sub-agent orchestration · React 19 + Vite + TailwindCSS · Cloudflare Pages + Workers.

Indie devs · Solo founders · App growth teamsVisit →
Currently exploring

In progress, on the side.

CGZB
paused · vertical experiment

AI into a shipping workflow.

A daily 30-second brief for freight-forwarder sales: SCFI route indices, spot rates from carriers, GRI alerts, and phrasing they can paste straight into client conversations. ~300 subscribers; 60%+ have actively said it’s helpful. Currently paused — picking it back up after Hecang and HK Filings close out.

The interesting bit here isn’t the data — it’s the format. Forwarder sales don’t want a dashboard, they want one sentence they can send a client. Designing the output around the consumer of the AI (the salesperson, mid-conversation) rather than around the data is the whole product.

Stack: Daily LLM synthesis pipeline · email delivery · scraping.

Freight forwarders · Shipping opsVisit →

Shipped apps

Smaller things built solo and shipped to the App Store. Not the headline of the studio, but the workshop where a lot of the engineering muscle came from.

A handful of standouts shown below · 19+ more on the App Store.

Lover Snap: AI Photo Maker app icon

Lover Snap: AI Photo Maker

Lifestyle

loversnap.com

Take stunning photos of people with the #1 AI Photographer! Generate photo and video content for your social media with AI. Save time and money and do an AI photo shoot from your laptop or phone instead of hiring an expensive photographer. Take photos featuring your own AI clone! # Features - Upload selfies to create a lifelike AI clone of yourself or loved ones. - Generate 100% AI photos in any pose, scene, or action with ease. - Try on outfits and accessories on your virtual character for creative content. - Create realistic AI videos from your photos to bring your moments to life. With Lover Snap, you’re not just taking photos; you’re capturing the essence of connection and creativity anytime, anywhere # Your Privacy, Our Commitment Your data is secure with us. Uploaded images are used only for creating your virtual photos, ensuring your privacy at every step. # Terms of Service https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ # Support Have questions or feedback? Reach us anytime at service@loversnap.com

Download on App Store
Still My Dog: AI Dog Companion app icon

Still My Dog: AI Dog Companion

Lifestyle

stillmydog.com

Still My Dog — An AI Companion & Pet Memorial App Still My Dog is a warm, intelligent AI companion that helps you remember, reconnect, and keep the bond alive with a beloved dog — whether they’re still by your side or have crossed the rainbow bridge. If you’re navigating pet loss, cherishing precious memories, or creating a new digital companion, Still My Dog offers a gentle space for healing, remembrance, and daily connection. ◆ A living digital twin of your dog Still My Dog creates a personal digital twin of your dog — a companion that sends heartfelt AI-generated video messages, reacts to your days, remembers shared moments, and grows with you over time. It feels personal because it’s built around your dog, your memories, and your story. ◆ What You Can Do • Keep the bond alive Receive personalized video messages shaped by your dog’s personality, your relationship, the weather, holidays, and daily context. Every message feels uniquely yours — because it is. • Daily video greetings From gentle morning check-ins to playful daytime nudges and calming reflections at night, your dog stays present throughout your day in short, meaningful videos worth saving. • Capture meaningful memories Record routines, habits, milestones, favorite places, and shared moments. Your dog remembers them — and brings them back into future interactions. • Adopt, revive, or start fresh Choose the journey that reflects your heart: • Adopt a digital dog inspired by real breeds • Bring back a dog you once deeply loved • Create a new companion from scratch Each path is designed with care, dignity, and emotional respect. • Personalized with LoRA magic Train a lightweight LoRA model from your own photos so your dog’s digital twin truly looks like them — their face, markings, colors, and charm. • Scenes from everyday life See your dog across beautifully crafted moments: cozy nights, car rides, park walks, holidays, and quiet everyday scenes. • Secure, private, yours Your photos, videos, memories, and models stay protected. No ads. No data selling. No tracking. Ever. ◆ Why People Love Still My Dog • It feels emotionally real — not like generic AI • It helps people heal, remember, and feel close again • It brings warmth and presence into everyday life • It creates a dedicated space for love, companionship, and memory ◆ Perfect For • Dog lovers seeking a deeper daily connection • Anyone coping with dog loss or pet grief • Families preserving memories of a beloved dog • People looking for gentle, comforting emotional support A companion that remembers. A bond that never fades. Still My Dog is more than an app — it’s a warm corner of your life where your dog is always with you. ◆ Your Privacy, Our Commitment Your data stays safe. Uploaded photos are used only to create your personalized dog model and videos — never shared or sold. ◆ Terms of Service https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ◆ Support Questions or feedback? We’re here anytime: service@stillmydog.com

Download on App Store
I’m Okay app icon

I’m Okay

Utilities

iamokaytoday.com

I’m Okay is a simple daily check-in app designed to give families peace of mind — without constant calls, messages, or monitoring. With just one small action a day, your loved ones know you’re okay. There’s nothing complicated to manage. Each day, open the app and tap “I’m Okay.” That’s it. If a check-in is missed, notifications are sent to trusted contacts — so people are informed only when it matters, without unnecessary worry. ◆ Who it’s for •. People living alone •. Older adults who want a simple, reliable daily routine •. Families who want reassurance without being intrusive ◆ Designed for privacy and simplicity • No location tracking • No activity monitoring •. No health data collection •. No mandatory account or sign-in Your check-ins stay simple and respectful. ◆ Important note I’m Okay does not provide medical, emergency, or safety services. It is intended only as a gentle daily check-in and notification tool. A small daily habit can bring a lot of reassurance. Check in. Stay connected. Rest easy. ◆ Privacy-focused by design No sign-up required. No tracking or data collection. Built as a straightforward utility — simple, focused, and dependable. ◆ Terms of Service https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ◆ Support Questions or feedback? Contact us at: support@iamokaytoday.com

Download on App Store
Photo Metadata Exporter app icon

Photo Metadata Exporter

Business

photo2xl.com

Photo Metadata Exporter lets you export photo metadata from your iPhone to Excel (.xlsx) files in seconds. Easily extract EXIF data such as file name, date created, location, image size, and camera information. All processing happens on your device — nothing is uploaded. Perfect for photographers, accountants, inspectors, and anyone who needs photo data in a structured spreadsheet. Key features: • Export photo metadata to Excel (.xlsx) • Select recent photos, albums, or manually choose photos • Customize which metadata fields are included • Supports camera, image, and location metadata • Batch export with progress tracking • Works fully on device • No subscription Compatible with Microsoft Excel and Apple Numbers. ◆ Privacy-focused by design Photos remain on your device at all times. No sign-up required. No tracking or data collection. Built as a straightforward utility — simple, focused, and dependable. ◆ Terms of Service https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ◆ Support Questions or feedback? Contact us at: photo2xl@txyou.com

Download on App Store
Car Photo Checklist app icon

Car Photo Checklist

Business

carphotochecklist.com

Car Photo Checklist helps you take complete, consistent car photos every time. It provides a structured photo checklist so you know exactly what to capture, in the right order, without missing important details. ◆Designed for practical use, the app focuses on clarity and efficiency. • Step-by-step car photo checklist • Covers exterior and interior angles • Consistent documentation across vehicles • Fast and easy to use • No account required Car Photo Checklist is useful for: • Used car listings • Vehicle handover and delivery • Car rentals and fleet records • Insurance documentation • Personal vehicle records Free Features: - Create one car photo checklist - Export once for free PRO (Subscription Required): - Unlimited exports - Re-export and edit previous checklists - Continued use for professional and dealer workflows ◆ Privacy-focused by design. All photos remain on your device. No sign-up, no tracking, no data collection. Built as a straightforward utility — simple, focused, and dependable. ◆ Terms of Service https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ◆ Support Questions or feedback? We’re here anytime: service@carphotochecklist.com

Download on App Store
Work with me

Four ways to build together

Pick the shape that fits. I'll personally read every submission and reply within a few days.

Tell me about it

Currently selected: Vertical AI partnership

Type *

Protected by Cloudflare Turnstile. No tracking, no cookies.

No CRM, no funnel. Replies come from me directly.

FAQ

Common questions

TXYOU is a one-person LLC that designs, builds, and operates AI-native software end to end. The studio runs three live web products — HK Filings (financial document intelligence), Hecang (multi-agent investment research), and ASAPilot (AI operations for Apple Search Ads) — plus an open-source SDK stack and over two dozen iOS apps on the App Store.

A single independent developer owns the entire stack — product design, AI integration, engineering, copy, release, and customer support. There is no team, no investors, and no outsourcing. This means tighter iteration loops, fewer compromises, and a direct line to the person responsible.

Web products: HK Filings (hkfilings.app), Hecang (hecang.app), ASAPilot (asapilot.com), and cargozb (a vertical newsletter for freight-forwarder sales, currently paused). Open source: the hkfilings-python SDK and LiteRTLM-Swift (a Swift wrapper for running LiteRT-LM models on iOS, 39 stars). iOS: 24+ apps on the Apple App Store, listed in the Shipped Apps section above.

Yes — the work is closer to forward-deployed engineering than to consulting. The typical engagement: embed with your team, take a model from a demo against your real data to a deployment your team can actually rely on, hand it off clean. Discovery → prototype → production rollout → handoff, owned end to end. See "Enterprise AI deployment" under Work With Me for the shape, or write directly to hello@txyou.com.

Yes. The Vertical AI partnership track is for industry experts and domain specialists who want to co-build a product where their domain knowledge meets TXYOU's AI and product execution. Indie / Maker collaboration is for fellow solo builders on equity or revenue-share terms. Use the intake form to propose a fit.

Across products, the engineering pattern is the same: typed tool boundaries between model reasoning and any action with consequences, evidence-anchored outputs, human-in-the-loop on anything irreversible, full audit trail. The model is allowed to be wrong. The system is not allowed to be confidently wrong — particularly when someone is going to act on its output. This shows up differently in HK Filings (validator suite + source-page bounding boxes), Hecang (multi-agent orchestration with editor re-dispatch), and ASAPilot (typed tool boundary + spend thresholds + HITL), but it is the same idea.

Currently yes — open to Forward-Deployed / Applied AI Engineer roles, remote with timezone overlap, or relocation to Singapore or Hong Kong. The studio continues to run in parallel. See linkedin.com/in/jiuhong for the current state, or write to hello@txyou.com.

Email hello@txyou.com or use the intake form on this page. Every message is read personally by the founder; replies typically arrive within a few days. There is no CRM, no automated funnel, and no sales call before a real reply.

About

A studio of one. Production AI, end to end.

TXYOU is a one-person LLC that designs, builds, and maintains AI-native software end to end. The studio publishes more than two dozen iOS apps on the Apple App Store, runs three independent web products — HK Filings for source-traced HKEX filing intelligence, ASAPilot for Apple Search Ads operations, and 阖仓 / Hecang for multi-account investment research — and maintains a small open-source surface alongside.

The whole stack is owned by a single independent developer: product design, AI integration, engineering, copy, release, and customer support. That structure produces tighter iteration loops, fewer compromises, and a direct line to the person responsible. Every AI integration earns its place by removing friction or unlocking something new — never as a marketing label.

Solo, end to end

Idea, design, code, copy, ship. One person owning the whole stack means tighter loops and fewer compromises.

AI with intention

Not "AI for AI's sake." Every model call earns its place by removing friction or unlocking something new.

Shipped, not promised

Live on the App Store, used by real people. Roadmap is a tool, not a story.

Human-centric craft

Calm UI, careful defaults, no dark patterns. Software that respects your attention.

Philosophy

Technology that feels human

Software should feel calm, useful, and a little bit kind. Every app I ship starts from one question: does this remove friction, or add it? The answer is the whole product.

Get in touch

Idea, collab, or just hello?

I read every email personally. No funnel, no auto-reply.

hello@txyou.com