case study
That's My Best
Screenshots in. A playable social memory test out.
01 the problem
A screenshot contains visual evidence, but a model can still invent context, misread a tile, or turn an observation into mind-reading. The product also has to make quiz creation fast enough for a friend to finish, share, and pull other people into the loop.
02 the solution
Built a mobile-first web and iOS flow that ingests one to four social-grid screenshots, selects candidate tiles, and generates questions and answer-specific reactions. On the free default path the model's own guess becomes the answer key at seal time; per-question correction ships as a paid upgrade, not a required step. So the guardrails are code, not a review queue: no answers in the player payload, reveal only after a valid pick, an immutable seal, and scores only for players who actually played.
03decisions & tradeoffs
Invariants over a required review step
A human review step is worth building, but it is not what a system can rely on — the fastest path through any product is the one that skips it. Correction ships as a paid override; the invariants run either way.
Web links and an iOS app
Creation benefits from an app-like surface; participation must remain one tap away for friends who will not install anything first.
Objective visual memory over personality judgment
The funny part should come from what is actually visible in the screenshots, not invented claims about a person's looks, intelligence, or inner life.
Group reveal over constant notifications
Named players create anticipation, while a timed fallback prevents one missing friend from holding the entire experience hostage.
04 tech stack
Multimodal generation
Reads uploaded photo grids and proposes visually grounded quiz questions.
Machine-checkable invariants
Bound what a wrong guess can reach: no answers in the player payload, reveal only after a valid pick, an immutable seal.
Serverless product loop
Generation, publishing, attempts, reactions, group reveal, and share assets.
Capacitor + App Store
The live iOS app opens directly into the creation flow while web links preserve frictionless sharing.
05 results
- Live on the web and in the Apple App Store
- Invariants hold on every quiz, whether or not a human touched the answer key
- Answer-specific reactions, named friends, and timed group reveals create the social loop
- Early soft-launch generation cost measured at roughly 6–7¢ per completed quiz