Apps built on a backend that already exists
Web apps, installable PWAs, Flutter mobile apps and SaaS products built on altengine, our managed backend. We write your product, not the plumbing.
What altengine already gives you
- Auth for your app's end users
- Datastore and full-text search
- File storage and static hosting
- Realtime channels
- Functions, scheduled tasks and queues
- Mailboxes for inbound and outbound email
What we build on top
Your screens, your roles, your business logic, billing, dashboards and admin tools, as a web app, a PWA that installs from the browser, or a Flutter app for iOS and Android from one codebase. Because the backend is already in production, the build is measured in weeks.
1–4 weeks
- Progressive web app, Flutter mobile app, or SaaS
- Auth, datastore, search, files & realtime on altengine
- Billing, dashboards & admin tooling
- App Store & Play Store submission for mobile
- Usage-based hosting, first $3 every month free
The price depends on screens, roles and integrations. Every app runs on altengine, our own backend, which is what keeps the build short.
Get My Fixed Quote- No Altlimit monthly fee and no per-sale cut.
- You pay the platforms you run on directly: altengine.
- What the platforms cost
Apps we've shipped on it
Cognimon
A monster battler where the quiz question is the move. Answering is how your monster swings, so what a child is getting good at and what they are trying to win are the same thing. Runs on altengine, in a browser tab.
Cadence
A music game in a hand-drawn woodland. Built on a game engine compiled to WebGL and served from altengine, so there is nothing to download.
Questions, answered
What does it cost to run?
altengine is priced by usage, with the first $3 every month free, and you pay it directly. Mobile apps also need Apple and Google developer accounts in your name. There's no Altlimit monthly fee.
How is the price set?
By the number of screens, user roles and outside integrations. You get the exact number in writing within 24 hours of telling us what you're building.
Can it run on a different backend?
If you need AWS, Google Cloud or an existing system of yours, that's custom development, quoted separately.
What are you building?
Describe the app in a paragraph. We'll reply within 24 hours with scope and a fixed price.
Get My Fixed Quote