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App Development

A purpose-built web app for your small team — spec, prototype, build, launch.A custom app build for small teams. We start with a free chat to confirm an app is the right answer, write a tight spec, prove the riskiest flow with a clickable prototype, then build a hardened production app with auth, data, integrations, tests, and monitoring. Web-first with mobile-friendly responsive design.

price

from $6,500

timeline

4–10 weeks

cadence

custom

scope

Custom / scoped after discovery

00// matrix position

Where this fits in the services matrix.

Every service page now names the buyer state, the commercial shape, and the next route. That keeps the catalog navigable instead of feeling like disconnected offers.

01 · best fit

Build app with a fixed scope and written handoff.

02 · commercial shape

from $6,500 · 4–10 weeks · Custom / scoped after discovery

03 · route logic

Use the diagnostic or book a call to confirm fit before scope is written.

04 · decide

Not sure this is the right service? Run the route finder and get the matching path.

00B// application system

Bespoke architecture for App Dev.

App Development needs more than screens. It needs auth, data, workflows, integration paths, QA, and a clear deployment loop.

application system

Surface ⇄ System

SpecflowsSurfaceUIStatedataConnectAPIsShiprelease
This diagram shows the application as a product system: a user-facing surface backed by state, business rules, integrations, analytics, and supportable release mechanics.

App build pipeline

The diagram is intentionally simplified: it shows the buying logic and operating path, not a decorative fantasy architecture.

price

from $6,500

timeline

4–10 weeks

surface

web app

quality

tested

01// what you walk away with

The outcome, not just the output.

  • 01A live, custom web app your team and customers can use
  • 02A spec, a prototype, then a real production app — in that order
  • 03Tests, monitoring, and a runbook so the app survives without me
  • 04Mobile-friendly responsive design out of the box
02// scope

Concrete artifacts you keep — and what we leave out.

Working code, written docs, dashboards your team owns. We also list what this engagement deliberately does not cover, so scope is honest before you click.

// deliverables
  • Free 20-minute intro chat
  • Plain-English product spec with milestone-based pricing
  • Clickable prototype of the riskiest flow
  • Production app: auth, database, UI, integrations
  • Cross-device QA + accessibility + perf + security passes
  • Loom + written runbook + two weeks of bug-fix support
// not included
  • Native iOS / Android apps (web-first; we ship responsive web apps and PWAs)
  • Long-term hosting bills (your AWS / Vercel / Render account, your costs)
  • Open-ended scope expansion (changes go through written change-control)
03// methodology

How the engagement actually runs.

  1. 1Day 0

    Free intro chat

    A 20-minute call to decide whether an app is the right answer at all and which scope fits.

    Honest fit checkWeb vs native vs no-code recommendation
  2. 2Day 1–4

    Spec & price

    A short product spec capturing users, jobs, screens, data model, and milestone-based pricing.

    Product specWireframesMilestone pricing
  3. 3Week 1–2

    Working prototype

    A clickable prototype proves the core flow before we invest in the full build.

    Clickable prototypeConfirmed data model
  4. 4Week 2–7

    Production build

    Real app build — auth, database, UI, integrations, tests, monitoring, observability.

    Daily-updated stagingWeekly demo + statusTest + monitoring baseline
  5. 5Week 7–8

    QA & polish

    Cross-device QA, accessibility, performance, and a security pass before launch.

    QA logAccessibility reportLighthouse + security pass
  6. 6Week 8–10

    Launch & handoff

    Production cutover with a rollback plan, monitoring alerts, and a runbook your team can run.

    Live appLoom + runbookTwo weeks of bug-fix support
// track record

Receipts, not promises.

4–10 wks
Spec to launch
typical engagement
<2.5s
Largest contentful paint
on launch
95+
Lighthouse score
desktop & mobile
04// questions

Common questions.

01Why does the price start at $6,500?
Real apps need auth, data, tests, and monitoring on day one — not after launch. The starting price covers a tight scope with those baked in. Bigger apps quote higher; small internal tools may quote lower.
02Web app or native app?
Web-first. Modern web apps install to home screens, work offline, and ship 10x faster than native. If you genuinely need native, I will say so on the intro call and refer out.
03Can you take over an existing app?
Yes — start with Sage Audit ($750) so I understand the codebase, then we scope a continuation engagement honestly.
04What if my idea is too small for $6,500?
Then it might be a Ship (marketing site), an Automate (one workflow), or a Build (broader engagement). The free intro chat is the fastest way to find out.
// engage

Ready to start App Dev?

A 30-minute call to confirm fit, scope, and timeline. No pressure, no slides.

app system

From offer to operating system.

App Development is presented as a real engagement, not a generic service page: the surface, backend shape, delivery artifacts, and conversion path are all visible before the first call.

Scope App Dev

price

from $6,500

timeline

4–10 weeks

tier

A

Living architecture

Scope ⇄ Ship

The page now exposes how the engagement moves from buyer pain to production artifact, then into measurement and next-step routing.

Scope App Dev
  1. 01Free intro chatA 20-minute call to decide whether an app is the right answer at all and which scope fits.
  2. 02Spec & priceA short product spec capturing users, jobs, screens, data model, and milestone-based pricing.
  3. 03Working prototypeA clickable prototype proves the core flow before we invest in the full build.
  4. 04Production buildReal app build — auth, database, UI, integrations, tests, monitoring, observability.

Conversion path

  1. 01

    Diagnose

    Confirm the real app constraint, current surface, and business goal before writing code.

  2. 02

    Design the system

    Turn the offer into screens, data, workflows, ownership boundaries, and a measurable delivery plan.

  3. 03

    Ship the artifact

    Deliver App Dev as working code, docs, dashboards, or launch assets your team can actually use.

  4. 04

    Route the next move

    Decide whether the work becomes a one-time delivery, a care plan, or a larger product build.

Proof assets

App Development service visual

Asset slot

Service proof visual

Add a real screenshot, deliverable preview, or dashboard capture from a shipped engagement when approved.

pending real proof
Jason Teixeira, founder of Sage Ideas

Verified asset

Founder/operator photo

Real founder photo reinforcing principal-led delivery.

live

Asset slot

Client quote or logo

Add only permissioned testimonials or logos tied to this service category.

pending real proof
livebuild 18b85f02026-06-19 01:47Z
// solo studio// no analytics resold// every commit human-reviewed