CUSTOM APPS
A custom app for iOS and Android
An app for your customers, residents or staff. Or a customer portal where they sort things out themselves. Connected to the systems you already have, so nobody does the work twice.
When your own app makes sense
- Customers or staff call and email about things they could sort out themselves.
- An off-the-shelf app almost fits the way you work, but not quite.
- The data is already in your own system, but nobody can get to it on the move.
What I build
Apps for iOS and Android
With Kotlin Multiplatform I share the code between iOS and Android. One codebase instead of two, so one place to maintain.
Customer portals
An environment in the browser where customers, members or tenants log in and sort things out themselves. Without having to install anything.
Connected to your systems
The app or portal works with your CRM, accounting software or access system through an API integration. That way the data lives in one place.
In practice: a housing provider
A housing provider wanted to give residents digital access to their homes and the shared spaces.
Brief
Physical keys and cards cost property management a lot of time. They have to be handed over at every move, and a lost key means a new lock. Access had to go digital: granted and revoked remotely.
Approach
An app that lets residents open the door with their phone through Tapkey locks. Built in Kotlin Multiplatform, so one codebase for iOS and Android. More about the Tapkey integration.
Result
Residents open their front door and the shared spaces with their phone. Property management grants and revokes access without a key handover. One app for iPhone and Android.
Frequently asked questions
Do I need an app, or is a website enough?
Sometimes a good website or a customer portal in the browser is enough. I go through that with you first. An app makes sense when people use it often, or when it needs something from the phone, such as opening a lock.
What is Kotlin Multiplatform?
A way to write the code of an app once and share it between iOS and Android. You then do not have two separate apps that each need their own maintenance.
Who looks after the app once it is live?
I can. Apps age: new versions of iOS and Android now and then need changes. After the launch I can maintain and update the app.

Need a custom app?
Tell me who will use it and what it needs to do. You will hear from me.