Snap your meter, split bills fairly—zero hardware, $30/mo for roommates.
College students in shared housing are frustrated by GreenGrid's high subscription costs for basic energy monitoring features they need to split bills fairly.
WattShare lets college roommates upload photos of their energy meter for automatic OCR reading and usage calculation. It generates fair splits based on agreed ratios or equal shares, with shareable reports for bill payments. No expensive subscriptions or devices needed—just your phone.
College students living in shared housing or dorms
Cheapest photo-OCR energy tracker tailored for dorms, with roommate invite links and dispute resolution voting.
friendly
Snap meter photo, auto-extract reading with OCR.
Invite housemates via email/link to join household.
Track readings over time with simple charts.
Auto-compute each person's share based on ratios.
Export PDF reports for Venmo/Zelle splits.
Roommates vote to approve/override splits.
Notify if usage spikes.
PWA install for offline photo capture.
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| text | No | |
| name | text | Yes |
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| name | text | No |
| owner_id | uuid | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| household_id | uuid | No |
| reading_value | text | No |
| photo_url | text | No |
| timestamp | timestamp | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| reading_id | uuid | No |
| user_id | uuid | No |
| share_amount | text | No |
Relationships:
/api/householdsCreate household
/api/readingsUpload reading with photo
/api/splits/:readingIdGet splits for reading
/api/users/inviteSend invite
Basic features
Up to 4 users
Up to 10 users
| Month | Users | Conversion | MRR | ARR |
|---|---|---|---|---|
| Month 1 | 200 | 2% | $120 | $1,440 |
| Month 6 | 1,500 | 5% | $2,250 | $27,000 |
Snap your meter, auto-split costs. Save 80% vs GreenGrid.
Post in college subreddits like r/UCLA, r/college, DM Discord servers for dorm groups, offer free Pro for first month feedback.
Advanced monitoring
High cost for basics
Photo-only, student-priced
General splits
No energy tracking
Meter-specific
Network effects in households—more users per dorm locks in usage data.
Energy costs up 20% in 2023, remote learning decline increases shared housing.
OCR accuracy issues
Fallback manual entry
Low adoption
Free tier + campus targeting
Photo storage costs
Supabase optimized
Success: 60% interested
Success: 80% retention
Success: 500 signups
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