FieldLedger is a calm, no-clutter mobile app built for independent and small-to-midsize farm operators worldwide who are done guessing which fields and crops actually turn a profit. Farmers log plantings, inputs, harvests, and sales in seconds using photo snaps or voice notes — no clean hands required — and the app instantly surfaces per-field and per-crop cost, yield, and margin summaries in clear visual dashboards that replace the tangle of notebooks and spreadsheets. A base subscription around $15–30 per month keeps the core profitability engine accessible to a single operator, while a higher tier unlocks compliance-ready export reports and multi-user access for family farms and co-ops who need audit trails for buyers and regulators without hiring an accountant. From a smallholder in Kenya to a family grain operation in Brazil or a diversified vegetable farm in Poland, FieldLedger turns season-end guesswork into real-time decisions — plant more of what pays, cut what doesn't, and prove it on paper.
For Whom
👨🌾 🌍 📓 → 💸 😤 🌾 🌾 ❓ 💰 ❓ → 📱 ✨ 😌
Maria, a third-generation maize and soybean farmer in Brazil managing four fields across two family plots, scribbles input costs and harvest weights into a worn paper ledger at the kitchen table each night because she has no single place to see whether her north field is actually earning or quietly bleeding money season after season.
Mock Screens
9:41●●●
🌾 Field Ledger — Corn North 40 | Margin: +$312/ac ✅
🌽
+$312 / acre
Revenue $847 · Inputs $535 · 38.4 ac · Harvest: Oct 14
Margin bar: ██████░░ 62% above break-even
Top cost: Nitrogen fert — $188/ac (tap to drill down)
Corn led margins at 38% · Soybeans broke even · Sunflower: cut next year
Net $47,820 ↑12% vs last season
Top Field: North 40 — $18,340 profit
⚠️ South Creek: –$2,104 · review inputs
●○○○
9:41●●●
📸 Quick Log — Tap to snap, speak, or type your harvest 🎯
📸
Log Harvest — North Paddock Tomatoes
Tap the shutter, hold mic to speak, or type below — works with muddy gloves 🧤
🎙️ "28 crates, Roma, $0.42/kg gate price"
📷 Snap crate weight ticket
✍️ Add input cost — Fertiliser $34.00
●○○○
The Hero View
the one screen / scene people will remember
9:41● ● ●
🌾
Good morning, Carlos ☀️
Río Grande Farm · 284 acres · Season 2024
FieldLedger
North Pasture Corn is your most profitable field right now
$312 net margin per acre · 94 bu/acre yield · $1,840 revenue vs $1,528 costs. You're tracking 18% above your 3-year average. Harvest window opens in 11 days.
Season Net So Far
$47,230
Best Margin/Acre
$312 — Corn
Inputs vs Budget
91% · $2,100 under
in this view
1
🌽 North Pasture · Corn · 62 ac
$312/ac margin · Harvest in 11 days
2
🌿 East Slope · Soybeans · 88 ac
$204/ac margin · Logged 3 inputs this week
3
🌾 Creek Bottom · Wheat · 74 ac
$97/ac margin · Sold 2,100 bu @ $5.42
4
🔴 South Field · Alfalfa · 60 ac
−$44/ac · High water cost dragging margin
➕ Log Input or Sale
📊 View Full Profit Report
📋 Export Compliance Records
Core Features
Per-field profit dashboard showing real-time margin calculated from logged inputs, yield weights, and sale prices on a single scrollable screen
Voice and photo quick-entry for logging seed purchases, fertilizer applications, harvest weights, and sale transactions with muddy-hand-friendly large tap targets
Season-over-season crop comparison table ranking each crop by net margin per acre or hectare so farmers can see exactly which crops to expand or drop
Compliance export generator producing PDF and CSV audit-ready records of inputs, quantities, dates, and certifications formatted for common buyer and regulator requirements
Multi-field cost allocation tracker that splits shared expenses like irrigation or equipment rental proportionally across fields based on acreage or custom weighting
Offline-first data entry with automatic sync when connectivity returns, supporting low-bandwidth rural environments across all global regions
Family and co-op multi-user access allowing up to five farm members to log entries under assigned roles with a single shared farm ledger view
aiOpenAI Whisper API for voice-to-text field log entry, plus lightweight on-device ML via TensorFlow Lite for offline yield trend anomaly detection and crop margin forecastingdataPostgreSQL (AWS RDS) for structured farm/field/crop/transaction records, Redis for session caching, and AWS S3 Parquet exports for compliance audit trail generationbackendNode.js with Express on AWS Lambda serverless functions, REST API with JWT auth, AWS S3 for photo storage, and AWS SES for compliance report deliveryfrontendReact Native (Expo) for iOS/Android cross-platform with offline-first SQLite local storage and camera/microphone API integration for photo and voice quick-entryplatformAWS Amplify for CI/CD and hosting, Expo EAS for OTA mobile updates and app store distribution, Stripe for global subscription billing at $15–30/month tiers, and i18n via i18next supporting 20+ languages for global farm operator reach
Monetization
Model
subscription
Price tier
$0 / $15/mo / $29/mo
Free vs Paid
Free: log up to 2 fields, basic cost and yield entry, simple margin summary. $15/mo: unlimited fields and crops, photo and voice quick-entry, visual profitability dashboard by field and crop, season-over-season comparison. $29/mo: compliance export reports (PDF and CSV for buyers and regulators), multi-user access for family operations or co-ops, priority support.
Key conversion moment
User logs their first harvest sale and sees the per-field margin summary reveal an unexpected loss or profit — the dashboard makes the number real and they immediately want to unlock all fields and full history.
The Vibe Trail
01 · audience
📊 📱 🎯
I'm sensing an app for data analysts who need mobile dashboards to track metrics and hit targets in real time.
02 · domain or indu
🌾 🎬 🏥 🏭 💰
I'm sensing an app for agricultural producers who need mobile dashboards to track farm-to-market metrics across producti…
03 · mood/feeling
😌 🎯 🌾 ✨ 🌱
Ah, I see small farm owners craving a calm mobile dashboard that tracks yields, costs, and compliance so they finally kn…