SAP to open-stack ERP migration
Manufacturer, 500+ employees. Phased migration off SAP ERP onto an open stack with custom modules — run in stages while the plant kept working.
- 0 downtime
- 8 mo migration
- −40% on licences
Short answer: a simple app with one main flow costs $8,000–18,000; a business app with roles, payments and integrations $18,000–50,000; a platform with multiple user types and compliance requirements $50,000+.
What we can show you
Roughly half of a project is work that AI does not compress. That is the whole reason "4× cheaper" claims are false advertising.
Seven things that genuinely change the number, and three that people worry about for no reason.
1. Number of user roles. Two roles is not twice one role — closer to 2.5×, because permissions, screens and test cases multiply.
2. Integrations you do not control. Their documentation is wrong; budget the debugging.
3. Payments and money. Refunds, disputes, tax, reconciliation — the flows nobody demos.
4. Real data migration. Legacy data is always dirtier than promised.
5. Regulation. Health, finance, children's data: audit trails and certification, not just features.
6. Native mobile. Two platforms, store review cycles, device testing.
7. Offline support. Sync conflicts are their own project.
Matters less than people think: the programming language, the cloud provider, and whether the design "already exists" in a Figma nobody validated.
US and Western Europe onshore: $90–160 per senior hour. Eastern Europe and nearshore: $35–60. Ours, published: $45 senior, $28–55 across roles. South and Southeast Asia: $18–30.
Rate is not cost. A cheaper hour that produces rework is more expensive than an accountable one — which is the argument for keeping senior review inside the price.
Booking app, one role, payments, no integrations — 190–210 h → $7,990, 3 weeks.
Field-service app, three roles, ERP integration, offline — 480–540 h → $18,900, 8 weeks.
Marketplace, two sides, payouts, moderation — 900+ h → from $35,900, 3 months.
Industries
We build with the domain in mind — from fintech and retail to manufacturing and healthcare.
The six that people search for, answered without a form in the way.
$8,000–18,000 for a simple app, $18,000–50,000 for a business app, $50,000+ for a platform. Scope drives it, not the technology stack.
Usually more expensive: two platforms, store reviews and device testing. A responsive web app is often the honest first step.
Different assumptions about roles, integrations and what "done" means. Compare scope documents, not prices.
On the code-writing share, measurably; on the whole project, 30–50%. Anyone quoting 4× off the total is either discounting work that did not get faster or selling you a template.
Budget 8–12% of the build cost per year, more if you integrate with systems that change often.
Yes, after a scoping week ($4,490, credited against the build). A fixed price on a vague scope is a negotiation waiting to happen.
There is no honest single number, but there is an honest range: a working first version from $7,990, a launch-ready product from $18,900. Android app development cost sits within a few per cent of iOS on React Native; AI app development cost adds inference on top, which we model during scoping and cap in code.
Manufacturer, 500+ employees. Phased migration off SAP ERP onto an open stack with custom modules — run in stages while the plant kept working.
Want this applied to your project?
Send the feature list and you get the same two-column breakdown we use internally — hours by role, and the number at the bottom.
One week of scoping turns it into a fixed price you can budget against.
Tell us what you need — we'll suggest the format and the timeline. We normally reply within one business day.
or write to us directly