EventSwipe

Offline-first POS for markets – swipe sales anywhere, sync when back online.

Score: 7.5/10GuineaHard BuildReady to Spawn
Brand Colors

The Opportunity

Problem

Freelancers find POS systems too expensive and inflexible for managing seasonal retail gigs.

Solution

EventSwipe is an offline-capable POS for freelancers at events with spotty WiFi, storing sales locally on device and syncing seamlessly. It supports quick barcode/QR scanning for fast checkouts and basic customer capture for future gigs. Ideal for outdoor markets or festivals where connectivity fails.

Target Audience

Freelance workers running seasonal retail gigs like pop-ups, markets, or holiday events

Differentiator

True offline mode with local-first architecture, outperforming cloud-only POS in unreliable networks.

Brand Voice

edgy

Features

Offline Sales

must-have20h

Record sales without internet

QR/Barcode Scan

must-have15h

Camera-based fast product lookup

Local Sync

must-have12h

Auto-sync when online

Event Mode

must-have10h

Switch between multiple events

Payment Queue

must-have14h

Process cards post-sync if needed

Customer Capture

must-have8h

Email/SMS opt-in for repeats

Battery Optimizer

nice-to-have6h

Low-power scanning mode

Voice Search

nice-to-have8h

Dictate product names

Custom Hotkeys

nice-to-have5h

Keyboard shortcuts for tablets

Analytics Sync

future4h

Post-event deep reports

Total Build Time: 102 hours

Database Schema

users

ColumnTypeNullable
iduuidNo
emailtextNo

Relationships:

  • one-to-many with events

events

ColumnTypeNullable
iduuidNo
user_iduuidNo
nametextNo

Relationships:

  • foreign key to users.id

products

ColumnTypeNullable
iduuidNo
event_iduuidNo
barcodetextYes
nametextNo
priceintNo

Relationships:

  • foreign key to events.id

pending_transactions

ColumnTypeNullable
iduuidNo
event_iduuidNo
datatextNo
syncedboolNo

Relationships:

  • foreign key to events.id

API Endpoints

POST
/api/events

Create event

🔒 Auth Required
POST
/api/sync-transactions

Bulk sync offline sales

🔒 Auth Required
GET
/api/products/:barcode

Lookup product

🔒 Auth Required
POST
/api/customers

Save customer data

🔒 Auth Required

Tech Stack

Frontend
Next.js 14 PWA + Tailwind + shadcn/ui + Dexie.js (local DB)
Backend
Supabase Edge Functions
Database
Supabase Postgres
Auth
Supabase Auth
Payments
Stripe (deferred)
Hosting
Vercel
Additional Tools
QuaggaJS barcodePouchDB sync

Build Timeline

Week 1: PWA and auth

35h
  • Offline install
  • Local DB setup

Week 2: Event and products offline

40h
  • Product CRUD local
  • Barcode scan

Week 3: Offline sales

45h
  • Transaction queue
  • Local totals

Week 4: Sync and payments

35h
  • Sync logic
  • Stripe queue

Week 5: Polish and reports

28h
  • Customer capture
  • Dashboard

Week 6: Testing offline scenarios

22h
  • Edge case fixes

Week 7: Launch prep

15h
  • Marketing site
Total Timeline: 7 weeks • 220 hours

Pricing Tiers

Free

$0/mo

20 tx/day

  • 1 event
  • Offline sales

Pro

$30/mo

200 tx/day

  • Unlimited events
  • Barcode
  • Customers

Power User

$79/mo

None

  • All + voice/hotkeys
  • API sync

Revenue Projections

MonthUsersConversionMRRARR
Month 11202.5%$90$1,080
Month 69009%$2,430$29,160

Unit Economics

$12
CAC
$380
LTV
6%
Churn
93%
Margin
LTV:CAC Ratio: 31.7xExcellent!

Landing Page Copy

POS That Works Offline – No More WiFi Fails at Markets

Swipe sales in the rain, sync later. Built for real gigs.

Feature Highlights

Full offline
Barcode magic
Auto-sync
Customer grabs
Battery smart

Social Proof (Placeholders)

"'Survived festival no-signal!' - Jen M."
"'Game-changer for outdoor markets.' - Alex P."

First Three Customers

Demo at local farmers markets in person, sign up vendors on-site with free month. Post video of offline demo on TikTok #marketlife. Target r/festivals and vendor apps.

Launch Channels

Product Huntr/SideProjectHacker NewsTikTok creatorsVendor forums

SEO Keywords

offline pos for marketsno wifi pos systemfarmers market pos appfestival pos offlineportable pos scanner

Competitive Analysis

Fees
Strength

Hardware

Weakness

Requires connection

Our Advantage

True offline

$14+/mo + fees
Strength

Customizable

Weakness

Online dependent

Our Advantage

Local-first for gigs

🏰 Moat Strategy

Local data sync network effects as users share event templates offline.

⏰ Why Now?

Outdoor events surging, but infrastructure lags; PWAs mature for offline.

Risks & Mitigation

technicalhigh severity

Sync conflicts

Mitigation

Conflict resolution UI

executionmedium severity

PWA adoption

Mitigation

One-click install prompts

financiallow severity

Deferred payments fraud

Mitigation

Sync verification

Validation Roadmap

pre-build7 days

Test offline pain with 10 vendors

Success: Pain confirmed

mvp28 days

Offline beta, 100 tx

Success: Zero data loss

growth14 days

Market demos

Success: 5 signups/event

Pivot Options

  • Full PWA POS suite
  • Barcode inventory scanner
  • Event app marketplace

Quick Stats

Build Time
220h
Target MRR (6 mo)
$2,500
Market Size
$600.0M
Features
10
Database Tables
4
API Endpoints
4