Do you work with in-house engineering teams?
Yes, and it is common in the Bay Area. That means working in your repository, to your conventions and through your review process, so the code is something your engineers can maintain after we finish rather than a black box handed over.
Native or cross-platform?
Cross-platform for the large majority, because one build and faster iteration matter more than marginal native performance while you are still learning what users want. Native is justified for heavy device access or demanding graphics.
Do we need a backend?
Almost always, if the app has accounts, stores data, sends notifications or takes payment. It is frequently the larger half of the work and the most common omission from quotes you compare against ours.
How do you handle iteration?
In cycles with review points rather than one delivery against a frozen spec. Bay Area products ship, measure and change, and an engagement structured as a single handover fights that.
Who owns the app and the code?
You do. It publishes under your Apple Developer and Google Play accounts, and code lives in your repository from day one rather than being transferred at the end.
Do you have an office in San Francisco?
No. We work with Bay Area clients remotely on overlapping Pacific hours, and we would rather say that than imply otherwise. Not carrying Bay Area overheads is a real part of the cost difference.
How long does an app take?
Three to nine months for a genuine product, depending on scope and integrations. Anything quoted in four weeks is a template or a wrapped website rather than an application.