Microsoft Power Apps vs Custom Code for ERP Front Ends
Power Apps is excellent for simple internal forms and approval flows, but it hits a hard ceiling on complex business logic, branded customer experiences and performance at scale. For a production ERP front end — a customer portal or operations portal real people rely on daily — full custom code removes that ceiling. The honest answer is that the right choice depends on how complex and how customer-facing the build is.
Where Power Apps genuinely shines
For internal, low-complexity tools — a leave-request form, a simple approval workflow, a basic internal dashboard — Power Apps is fast, cheap and maintainable by a capable in-house user. If that is your need, it is often the right tool, and we will say so.
Where it hits a ceiling
The limits show up on three fronts. First, complex business logic: BOM explosions, multi-tier pricing, batch traceability, validated write-back to the ERP — these strain low-code platforms quickly. Second, customer-facing polish: a Power App rarely looks or feels like your brand to an external customer. Third, performance and control at real data volumes, where you need the freedom to optimise.
What custom code buys you
A custom-coded staff portal or customer portal has no ceiling on logic, looks and performs like a production application, and is yours to own. Built on mainstream technologies — React, Next.js, TypeScript — any competent developer can maintain it, and the IP transfers to you. The trade-off is that it is a build, not a configuration, so it warrants the discovery-sprint scoping that low-code skips.
A simple way to decide
If the tool is internal, simple and low-stakes, try Power Apps. If it is customer-facing, logic-heavy, or something your operation will depend on every day, custom code will almost always serve you better over its life. The discovery sprint exists precisely to make that call honestly against your real requirements.
FAQ
We already tried Power Apps and it didn't work — why?
Usually because the requirement crossed the complexity ceiling: real ERP write-back, complex pricing or a branded customer experience. Those are exactly the cases where full custom code is the better fit.
Isn't custom code more expensive?
Up front, sometimes. Over the life of a daily-use, customer-facing system, the picture often reverses once you account for low-code workarounds, licensing and the things it cannot do. The discovery sprint gives you a fixed price to compare against.