S

QuizVault: Reward App Answer Archive

4.25

Derivation Chain

Step 1 CashWalk quiz answer search trend
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Step 2 Reward app users aged 40–60 waste time daily searching for quiz answers
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Step 3 Service that aggregates scattered quiz answers in one place to eliminate search time

Problem

Reward app users aged 50–60 who use CashWalk, Toss, OK Cashbag, and similar apps must solve 3–5 quizzes daily across multiple apps to earn points, spending 15–20 minutes per day searching for answers on Naver and Google. Answers are buried among blog ads, making them hard to find, and if the search timing doesn't match the quiz posting time, users miss out entirely.

Solution

A web service that aggregates today's quiz answers from major reward apps (CashWalk, Toss, OK Cashbag, Shinhan SOL, etc.), organized by app and time slot. Subscribers receive answers via KakaoTalk or web push notification immediately after quizzes are posted. A past answer archive also reveals recurring question patterns.

Target: Ages 50–65, using 3+ smartphone reward apps, retirees or homemakers highly motivated by daily micro-point accumulation
Revenue Model: Free web service. Premium Subscription ($1.45/month, KRW 1,900) for real-time alerts + ad removal. Future reward app affiliate marketing commissions.
Ecosystem Role: Infrastructure
MVP Estimate: 2_weeks

NUMR-V Scores

N Novelty
2.0/5
U Urgency
5.0/5
M Market
5.0/5
R Realizability
5.0/5
V Validation
5.0/5
NUMR-V Scoring System
N Novelty1-5How uncommon the service is in market context.
U Urgency1-5How urgently users need this problem solved now.
M Market1-5Market size and growth potential from proxy indicators.
R Realizability1-5Buildability for a small team with realistic constraints.
V Validation1-5Validation signal quality from competition and demand data.
Each dimension is scored 1-5 and weighted into grade S/A/B/C/D.
SaaS N=.15 U=.20 M=.15 R=.30 V=.20 Senior N=.25 U=.25 M=.05 R=.30 V=.15

Feasibility (78%)

Tech Complexity
34.7/40
Data Availability
23.1/25
MVP Timeline
20.0/20
API Bonus
0.0/15
Feasibility Breakdown
Tech Complexity/ 40Difficulty of core implementation stack.
Data Availability/ 25Practical availability and cost of required data.
MVP Timeline/ 20Expected time to ship a usable MVP.
API Bonus/ 15Bonus for viable public API leverage.
Total 100 points; below 50% is filtered out.

Market Validation (72/100)

Competition
10.0/20
Market Demand
20.0/20
Timing
14.0/20
Revenue Signals
7.5/15
Pick-Axe Fit
10.5/15
Solo Buildability
10.0/10
Validation Breakdown
Competition/ 20Signal quality from competitor landscape.
Market Demand/ 20Demand proxies from search and mention patterns.
Timing/ 20Fit with current shifts in tech, behavior, and regulation.
Revenue Signals/ 15Reference evidence for monetization viability.
Pick-Axe Fit/ 15How well the concept serves participants in a trend.
Solo Buildability/ 10Practicality for lean-team implementation.
Total 100 points; below 50 is filtered out.

Technical Requirements

Backend [medium] Frontend [low] Infrastructure [low]
Dashboard