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Custom App Development
Custom app development consulting means translating business problems into technical specifications, partnering with the right developers for implementation, and overseeing architecture and delivery — so you get a working, well-scoped build without paying a senior consultant's rate for every commit.
Partner-delivered. Adults in the room.
Every business eventually runs into the edges of off-the-shelf software. The reporting tool that almost does what you need. The automation platform that covers 80% of your workflow. The SaaS you've outgrown.
When it's time to build something custom — an internal tool, a customer-facing app, an AI-powered workflow — you want someone in the room who understands both the business problem and the technical reality. That's my role.
What the work covers
- Internal tools and dashboards — custom reporting, workflow automation, data aggregation from disparate systems
- Customer-facing applications — portals, calculators, configurators, self-service tools
- AI-powered workflows — LLM-based internal tools, custom agents, AI-enabled features inside your existing platforms
- Integration and middleware — connecting systems that don't talk to each other natively
- Marketing technology builds — attribution tools, budget optimization, lead routing, custom reporting layers
How it works
- Discovery and scoping — I translate business problems into technical requirements, with honest timelines and cost estimates
- Partner selection — matching the project to a developer or small team with the right stack experience
- Oversight and QA — I review architecture decisions, flag risk, keep the build accountable to spec
- Delivery and handoff — working software, clear documentation, ongoing maintenance plan
Why this model
I ship production software myself. Campaign Budget Optimizer — my AI-native cross-platform paid media tool — launches May 2026. I built it solo using AI coding tools and have firsthand, recent experience with modern dev workflows, LLM integration, and SaaS infrastructure.
But for most client app work, you don't need me writing every line of code. You need someone who:
- Knows what a realistic scope and timeline look like
- Can spot bad architecture decisions before they become expensive
- Will push back on the developer when they're cutting corners or gold-plating
- Understands how the app needs to integrate with your marketing and measurement stack
That's the role I take.
Who it's for
- Marketing teams that need a custom tool built to solve a specific workflow problem
- Founders with a software idea who want senior oversight before they hire engineers
- Companies building AI features into their product who want a senior operator in the room
- Existing Corriston Consulting clients who need a build alongside their marketing work
What I don't do
I don't write production code for clients myself — my time is better spent on oversight and the marketing work that only I can do. If the project is small enough that one developer can handle it end-to-end, I'll recommend that person and stay involved in review only. For larger builds I bring in a trusted team.
Tell me what you want to build → — I'll tell you whether it's scoped right, whether it's the right path, and what it would actually cost.
Frequently asked questions
Does Corriston Consulting build custom software?
Yes, through a partner model. I scope the build and oversee architecture and QA; trusted development partners handle the code. The goal is senior oversight on technical decisions and honest timelines without locking you into my hourly rate for every line of code.
What kinds of custom apps do you build?
Most common requests: internal tools and dashboards, customer-facing portals and calculators, AI-powered workflows and internal agents, integration and middleware between disconnected systems, and marketing technology builds (attribution tools, budget optimization, lead routing). If it's software, and it touches marketing or operations, it's in scope.
Why partner-delivered rather than in-house development?
I ship production software myself — Campaign Budget Optimizer is my AI-native paid media tool launching May 2026 — so I understand modern development workflows, LLM integration, and SaaS infrastructure firsthand. But for most client builds, you don't need me writing every line of code. You need someone who can scope it right, spot bad architecture early, and keep the developers accountable. That's the value of the oversight role.
Can you help with AI-powered features for our product?
Yes, that's one of the most common engagement types right now. I've been building AI-native tools since early 2025 and work with LLMs daily. The engagement typically covers architecture decisions, prompt and workflow design, integration strategy with existing systems, and oversight of implementation.
How much does custom app development cost?
Pricing depends on scope, complexity, and which partner handles the build. Simple internal tools start around $10K–$25K. Complex builds with AI components or multiple integrations run $30K–$100K+. Every project starts with a scoping phase — no development starts before a realistic cost estimate is agreed.
Why doesn't Corriston Consulting quote app development at an hourly rate?
Hourly billing misaligns incentives — slower developers cost more, and scope creep is harder to control. Fixed-scope engagements with clear deliverables and timelines are better for the client. The scoping phase exists to define scope tightly enough that fixed pricing works.