Flow Automator
Local workflow automation with a visual node graph, MDX scripting and full offline execution.
Services
Six disciplines. One studio. From the first sketch of an interface to the binary shipped on the App Store, xinghzhe stays with you across the entire product lifecycle. Every engagement is local-by-default, GDPR-aware by design, and audited before release.
// the catalogue
What we offer.
Each service is delivered by a dedicated sub-team. Cross-functional work is the default, not the exception. Pick one or bundle them.
core service
iOS, iPadOS, macOS & visionOS App Development
We design and ship native Apple-platform apps with a focus on the App Store editorial quality bar. From prototype to TestFlight to public release, our engineers handle the full lifecycle: Swift / SwiftUI / Objective-C, Combine, Core Data, CloudKit opt-in, App Store Connect submission, App Review remediation, GDPR / UK-GDPR / CCPA manifest declarations, and post-launch maintenance.
- SwiftUI, UIKit, AppKit
- Combine, async/await
- Metal & Core Animation
- App Store submission
- visionOS spatial UIs
- TestFlight beta ops
- Privacy nutrition labels
- Multi-language localisation
core service
Android & Wear OS App Development
Kotlin-first Android engineering across phones, tablets and Wear OS. Jetpack Compose for rapid UI iteration, Material 3, Room for local-only data, WorkManager for background scheduling, and the Play Console submission flow including Data Safety form completion.
- Kotlin, Jetpack Compose
- Material 3 / Dynamic colour
- Room / DataStore
- Wear OS Tiles
- Play Console Data Safety
- Multi-device delivery
- WorkManager scheduling
- Battery-efficient code
research-led
Programmatic Audio Synthesis
End-to-end audio pipeline engineering — from procedural sound-design algorithms and Core Audio / WebAudio engines, to MIDI controllers, real-time DSP in C++ / Rust, generative music systems and audio-reactive UI components. Deliverables range from standalone plugins to drop-in soundscape engines.
- Procedural sound generation
- Real-time DSP (C++/Rust)
- Core Audio & Web Audio
- AudioUnit v3 plugins
- MIDI 2.0 integration
- Adaptive sound design
- Generative music systems
- Field-recording pipelines
design
Visual Interaction Design
Design systems, micro-interactions, motion language and shader-driven scenes, hand-tuned for performance and accessibility. We produce Figma libraries, custom illustration sets, animated SVGs, Lottie / Rive / SpriteKit deliverables and complete UI kits for your in-house team.
- Figma design systems
- Motion & micro-interaction
- Custom SVG & illustration
- Lottie & Rive rigs
- Shader / GLSL art
- Reduced-motion accessibility
- Light, dark, custom themes
- Typography systems
compliance
Privacy & Security Engineering
Threat-modelling workshops, secure-by-design review, GDPR / UK-GDPR / CCPA / PIPL compliance audits, App Privacy nutrition-label preparation, on-device ML governance and end-to-end encryption audits. We also advise on consent flows, dark patterns avoidance and DPIA / ROPA documentation.
- Threat modelling
- GDPR / UK-GDPR audits
- App Privacy nutrition labels
- End-to-end encryption
- On-device ML safety
- DPIA / ROPA drafting
- Penetration testing partner
- Vendor DPIA reviews
engineering
Bespoke Utility Development
Need something off the App Store shelf? xinghzhe builds bespoke tools — internal automation, scientific visualisation dashboards, secure document pipelines and edge-AI prototypes. All deliverables ship with documentation, threat models and a long-term maintenance plan.
- macOS menu-bar utilities
- CLI tools in Rust/Swift
- WebAssembly modules
- Edge-AI prototypes
- Scientific visualisation
- Internal automation
- Reusable Swift packages
- Source-code handover
// on the App Store
Six production apps, all shipped by xinghzhe.
The same studio that builds for partners also publishes its own product line — six iOS / macOS apps serving collecting, training, organising, budgeting and asset-management communities.
Collectible Index
Dynamic valuation engine for collectors with chart forecasting, FX normalisation and tax logs.
Posture Studio
Body posture data recorder with on-device motion capture, session replays and progress heat-maps.
Estate Vault
Encrypted local vault for house and family documents. AES-256, biometric gating, OCR on-device.
Fragment
Inspiration fragment classification with auto-tagging, mood boards and quick capture widgets.
Cyclical Budget
Recurrence-aware budget engine with envelopes, forecasting and Apple Watch complication.
// how an engagement runs
From kickoff to App Store.
A standard engagement runs 12–24 weeks across five phases. Each phase ends with a written deliverable you can keep.
Week 0 → 1 · Discovery
Threat-model & positioning workshop
We begin every engagement with a written threat-model, an audit of in-scope regulations (GDPR / UK-GDPR / CCPA / COPPA / FERPA / PIPL) and a positioning sprint that returns a one-page product brief.
Week 2 → 4 · Design
Design language & interaction system
A Figma-native design system, a motion language reference, an illustration pack and a clickable prototype. We involve your legal team early so every consent flow is reviewed before code is written.
Week 5 → 12 · Engineering
Native build, paired with your team
Two-week sprints with shared Linear / Jira boards, weekly demo builds on TestFlight / Firebase App Distribution and a documented architecture decision record (ADR) for every non-trivial choice.
Week 13 → 16 · Hardening
Security, accessibility & localisation
.
Penetration testing by a partner firm, WCAG 2.2 AA audit, reduced-motion mode, VoiceOver / TalkBack validation, EN / FR / DE / ES / ZH-CN localisation pass and a completed App Privacy / Data Safety form.
Week 17 → 22 · Release
App Store submission & launch
We shepherd the release through App Review / Play Console, prepare press materials, set up review-monitoring dashboards, and run a 90-day hyper-care window. After that, an optional retainer.
Year 2+ · Longevity
Long-term maintenance
Annual major releases, OS deprecation handling, dependency updates, App Privacy label refreshes and quarterly privacy-impact reviews. We treat every shipped product as a long-term relationship.