Power Apps or a custom app?
Power Apps fits internal form apps where the license is already covered by the Microsoft agreement and speed matters most. A custom app wins when UX, performance, or external users are decisive. Calculate the per-user license cost carefully, since it often surprises, and factor in what it costs to leave the platform if the app becomes business-critical.
In Microsoft-heavy organizations, this question comes up regularly: should we solve this in Power Apps or build a real app? Both are reasonable choices, but they fit different needs. Here’s a comparison to help you figure out which applies to your situation.
Power Apps’ strengths
Power Apps is Microsoft’s low-code platform for quickly building simpler apps, often without deep programming. Where the platform is strongest is internal needs.
- Speed. A useful app for collecting or displaying data can be in place in a short time.
- The license may already be paid for. If the organization has a Microsoft agreement, basic Power Apps use is in some cases included, lowering the bar.
- Integration with the Microsoft world. The connection to SharePoint, Teams, and other Microsoft services is seamless.
- Less dependence on developers for the simplest apps, since the business itself can build some of it.
A typical success case: an internal app where staff log deviations or fill in checklists, previously handled in spreadsheets. There, Power Apps is often an excellent choice.
Power Apps’ ceiling
The strengths have a downside. As soon as requirements rise, you hit the platform’s limits.
- UX. You’re bound to the platform’s building blocks. A distinctive, polished feel is hard to achieve.
- Performance. For apps with a lot of data or high speed requirements, there’s a ceiling.
- External users. Power Apps is built for the internal organization. Apps for customers or the public fit worse, both technically and license-wise.
In short: the more the app resembles a public product, the faster you hit the ceiling. That’s when a custom app starts paying off.
The license math that often surprises
This is where many make an expensive miscalculation. “We already have Microsoft” only holds up to a point.
More advanced apps, certain connections, and external scenarios can require separate per-user Power Apps licenses. The cost per user might look small, but it has to be multiplied across the whole user base and it runs every month, year after year.
A concrete way to think about it: an app used by several hundred employees gets a completely different calculation than an app for a small group. Past a certain number of users, the ongoing license cost can, over time, exceed what a custom app would have cost to build once. So always calculate for the whole user base over a few years, not for a single license.
The exit cost when the app outgrows the platform
The last, and often overlooked, factor: what happens when a Power Apps app becomes too important for the platform?
An app built in Power Apps lives inside Microsoft’s tooling. It can’t be lifted out and moved as is, if it’s to become a standalone custom product, it has to be rebuilt. That’s the exit cost.
The problem is that this is often discovered late, once the app has already become business-critical and hard to do without. Then you’re facing both the cost of rebuilding and the risk of migrating something the business depends on.
How to choose – and a pragmatic middle path
A common and smart strategy is to start in Power Apps to quickly and cheaply validate that the need exists, and build a custom app only if and when the app proves business-critical. Then you make the decision with your eyes open instead of being forced into it.
The rule becomes: internal, simple, and fast favors Power Apps; external, polished, and business-critical favors custom.
Questions to ask before deciding
A few questions help you place the app on the right side:
- Who will use the app? Just your own staff, or also customers and external parties? External users favor custom.
- How many will use it, and for how long? Calculate the per-user license cost over a few years and compare with a one-time build.
- How business-critical will the app become? The more important it becomes, the more the risk and cost of one day having to move it off the platform weigh.
- How polished does the experience need to be? If you need a distinctive, refined feel, you’ll quickly hit Power Apps’ ceiling.
The answers usually point clearly in one direction. If they’re mixed, the pragmatic middle path, start in Power Apps, build custom if it grows, is often the wisest choice.
Not sure which side your app falls on, or facing a migration off Power Apps? You’re welcome to get in touch and we’ll think it through with you.
Frequently asked questions
When is Power Apps the right choice?
When it's about internal apps for forms, registration, and simpler workflows, and the organization already has Microsoft licenses. Then a useful app can be in place fast and cheap. Power Apps is strongest specifically for digitizing internal processes otherwise handled in spreadsheets or on paper.
When does a custom app pay off instead?
When user experience is decisive, performance needs to be high, or the app will be used by external customers. Power Apps has a ceiling on how polished and fast an app can get, and public or business-critical products often hit that ceiling. Then a custom app gives more freedom.
Is Power Apps free if we have Microsoft 365?
Not necessarily. Some use cases are covered by existing licenses, but more advanced apps and connections can require separate per-user Power Apps licenses. Across many users, that can become a significant recurring cost. Calculate it for the whole user base before deciding.
What is the exit cost with Power Apps?
It's the cost of moving off the platform once an app outgrows it. Since the app is built inside Microsoft's tooling, it can't be lifted out as is, it has to be rebuilt. The more business-critical the app has become, the bigger that cost and risk get at migration.
Can we start in Power Apps and switch later?
Yes, and it's a common and often smart path. You validate the need fast and cheap in Power Apps and build custom only if and when the app proves business-critical. Just be aware of the exit cost, so the switch becomes a planned decision rather than an unpleasant surprise.