Foxden

Early-stage idea validation

Quickly test a raw concept before investing time or money into building it.

Competitive research

Automatically scan App Store, Google Play, Product Hunt, itch.io, and more to see who else is in the space.

Market sizing

Get AI-estimated market size numbers to gauge opportunity.

Brainstorming derivatives

Swipe through AI-generated variations of your idea to explore adjacent angles.

Product scoping

Use deep-dive hints to surface required features and next actions for moving from validation to a real product.

5-axis scoring

Foxden evaluates your idea on novelty, feasibility, market, problem depth, and differentiability—displayed in a half-gauge UI for instant readability.

7-source competitor search

Automatically searches across App Store, Google Play, Product Hunt, itch.io, and other sources to surface competitors.

Market size estimation

AI estimates the market size for your idea as part of the competitor search results.

Derivative swipe interface

AI generates one derivative idea at a time; swipe right to save, left to discard, up to deep-dive, or down to defer.

Deep-dive implementation hints

Exploring a derivative reveals required features and actionable next steps, bridging idea validation to product development.

Passkey sign-up

Register or log in using face or fingerprint authentication in about 3 seconds—no password or email verification needed.

Encryption at rest

Your idea inputs are encrypted at rest and never shared or shown to third parties.

Google login alternative

If passkey isn't your thing, Google login also works.