Case study
Northstar Labs
A cross-platform mobile app taking an early-stage SaaS to launch.
- Client
- Startups & SaaS
- Service
- App Development
- Timeline
- 6 weeks to launch, then ongoing
- Delivered
- 2025
A seed-stage SaaS team with a working web product and no mobile presence.
Results
What changed
Measured after launch against the client's own baseline.
- From kickoff to both app stores
- 6 weeks
- Of active users on mobile within two months
- 72%
- Crash-free sessions at launch
- 99%+
- Cold start on a mid-range Android device
- 1.8s
The problem
Their users worked on site, away from a desk, but the product only existed in a browser. A funding milestone required a shipped mobile app, and the team had one backend engineer and no mobile experience.
What we built
A cross-platform app built against their existing API, scoped hard to the three things users actually did in the field. Shipped to both stores in six weeks, with offline capture so a lost signal never costs a record.
Approach
How we got there
- 01Cut the backlog to three core flows by watching five users work for a day.
- 02Built against the existing API rather than asking their one backend engineer to change it.
- 03Added an offline queue so field records save locally and sync when signal returns.
- 04Set up over-the-air updates so fixes ship without a store review.
- 05Handled both store submissions, privacy manifests, and data-safety declarations.
Built with
They cut half our feature list in the first week and were right about every cut. We hit the milestone because of it.
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