BuildBrief / Mobile apps

Choose the right first pass for your idea.

BuildBrief is now mobile-only. Pick a free Quick app for focused questions, risks, and a small first slice—or a deeper paid teardown on Android.

Compare the three apps Read the privacy policy

Three mobile apps. No web version. Available through the Apple App Store and Google Play. Each app generates briefs on your device without a BuildBrief account.

Compare apps

Choose by device and depth.

Quick is the free, compact option on both platforms. Idea Teardown is the paid Android option for a more probing second opinion before you build or price a concept.

iPhone + iPad Free

BuildBrief Quick

A compact first pass using Apple's on-device language model.

Sharpens the idea into one clear sentence
Surfaces three questions and two concrete risks
Suggests the smallest useful first slice
Requires an Apple Intelligence-capable device

View on the App Store

Android Free

BuildBrief Quick

The same fast first-pass format, powered by Gemini Nano.

Sharpens the idea into one clear sentence
Surfaces three questions and two concrete risks
Suggests the smallest useful first slice
Runs locally on compatible Android devices

View on Google Play

Android Paid

BuildBrief: Idea Teardown

A deeper second opinion for ideas that need more pressure-testing.

Returns a sharper, more buildable restatement
Surfaces three to five decisive questions
Identifies assumptions, blockers, and early risks
One upfront purchase with no subscription

View on Google Play

Which one should I choose?

Start with Quick if you want momentum.

Choose the free App Store or Google Play version for a concise brief you can generate in a few moments.

Choose Idea Teardown if you want more pressure-testing.

The paid Android app asks more decisive questions and digs further into assumptions and blockers before you commit.

Private by design.

All three apps process your idea on-device. Marbatis Systems does not collect your idea or generated brief, and the apps include no accounts, ads, analytics, or tracking.

How privacy works