PrizeSense

A privacy-first mobile app that teaches people to read giveaway rules, spot prize scams, and understand odds before money or judgment is on the line.

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Inspiration

PrizeSense started with one recurring consumer problem: official giveaway rules can be hard to interpret, fake prize messages are designed to create urgency, and odds are often presented in ways that people do not intuitively understand.

The project is also motivated by concern that an increasingly K-shaped economy can make prize-based offers, sweepstakes, and gambling-style promises feel more compelling to people under financial pressure. At the same time, those offers are easier to encounter online. PrizeSense is intended as a calm educational resource for people who may be especially exposed to misleading claims or misunderstood odds, including younger adults building financial and probability literacy and older adults who are frequently targeted by impersonation and prize scams.

We wanted one modern, approachable mobile app that helps people slow down before money or judgment is on the line. PrizeSense does not tell users that a message is definitely safe, predict a win, or tell anyone how to gamble. It teaches the questions to ask, the warning signs to notice, and the math behind chance.

Sweepstakes Hunter LLC built PrizeSense as a standalone product with its own identity, bundle ID, store listings, codebase, and original fictional curriculum.

What it does

PrizeSense combines three connected learning tracks:

  • Rules literacy: practice eligibility, deadlines, time zones, entry limits, and no-purchase language.
  • Prize-scam defense: examine claim fees, gift-card demands, lookalike links, account-takeover attempts, oversized claim forms, and guaranteed-win claims.
  • Chance and odds literacy: translate “1 in X” into a plain percentage, understand independent outcomes, compare repeated attempts, and explore simplified payout rate, house edge, and expected loss.

The Prize Message Lab highlights common warning signals in pasted winner-message text and explains what to verify. The free Chance Translator makes unfamiliar odds easier to read. Both tools are deterministic and run on the device; PrizeSense does not intentionally upload or retain pasted messages or Odds Lab inputs.

The free experience includes four introductory drills, three Message Lab checks, the Chance Translator, and odds-myth explainers. PrizeSense Pro unlocks the complete 13-scenario curriculum, unlimited Message Lab checks, Repeat Reality and Expected-Loss tools, progress, streaks, and future learning packs.

PrizeSense is an educational app, not a gambling product. It has no wagering, simulated betting, live odds, operator links, deposits, wallets, bet tracking, or recommendations.

How we built it

We built PrizeSense with React Native, Expo, and TypeScript for a consistent native experience on iOS and Android. The lesson engine uses original fictional scenarios, deterministic scoring, and immediate plain-language explanations. Progress and streaks are stored locally.

Prize Message Lab uses transparent rule-based analysis. Odds Lab uses deterministic probability functions with unit tests around boundary cases and repeated-event calculations. The visual system uses a high-contrast near-black palette with citrus, purple, and coral learning cues.

RevenueCat manages one prizesense_pro entitlement across a $9.99 annual subscription with a seven-day introductory trial and a $24.99 one-time lifetime app-access purchase. Both products unlock the same Pro curriculum; neither buys an entry, prize opportunity, odds boost, or gambling credit.

Challenges we ran into

The hardest product challenge was balancing usefulness with responsible language. A safety tool can create false confidence if it issues verdicts, and an odds tool can drift into gambling utility if it predicts outcomes or promotes operators. We designed clear boundaries: teach signals instead of declaring safety, illustrate math instead of recommending play, and keep private inputs on the device.

The technical challenge was making native purchases and restores work across both stores while keeping development builds fail-closed whenever store products or RevenueCat configuration are incomplete.

Accomplishments that we are proud of

  • Thirteen original fictional drills across rules, scam defense, and odds literacy
  • A privacy-preserving on-device Prize Message Lab
  • A free Chance Translator plus advanced repeated-probability and expected-loss tools
  • Clear consumer-safety boundaries and a direct link to independent problem-gambling support
  • A polished, accessible learning center with purposeful visual storytelling
  • One RevenueCat entitlement with annual and lifetime options
  • Automated coverage for scoring, free limits, odds calculations, purchase mapping, and reviewer access

What we learned

Trust comes from explaining limits as clearly as features. People do not need another tool that promises certainty; they need a calm way to practice judgment. Rules literacy, scam defense, and probability literacy reinforce each other because all three ask the user to pause, verify the source, and understand what the information actually means.

We also learned that monetization can support a consumer-education mission when the free tier is genuinely useful and the paid tier adds depth rather than withholding basic safety information.

What is next for PrizeSense

PrizeSense is now fully published on Google Play and available in the United States. Version 1.0.0 (version code 9) has a 100% production rollout. The signed Android build passed a focused real-device entitlement test: Pro was active on first launch and remained active after force-stop and relaunch. Use the Google Play listing below to download the submitted app.

Next, we plan to expand the fictional curriculum, gather user feedback, and add more plain-language chance-literacy lessons while preserving the same boundaries: no private-message collection, no sponsor verification, no predictions, and no wagering functionality.

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