NEW Built for India's diamond merchants

Diamond trading,
reimagined for the modern desk.

Replace dusty registers with a precision ledger. Track inventory, generate GST invoices, and manage brokers — all in one secure, beautifully designed app.

Download on Play Store Take the tour
Bank-grade security GST-ready invoicing 3 languages supported
App Dashboard
Live Stock
1,284.50 ct
Net Profit
+ ₹4.82 L
GST Invoice
Generated · PDF
0
Live Stock Tracking
0
Accuracy Guaranteed
0
Indian Languages
0
Always-on Ledger
Features

Everything a diamond desk needs.
Nothing it doesn't.

Eliminate manual registers and manage your entire stock with 100% accuracy — across inventory, invoicing, brokerage and finance.

Stock Management

Live tracking of Opening Carats, Sold Carats, and Inventory Valuation. Know your business health in seconds.

Rough · 0.30 - 0.50ct 428.40 ct In stock
Polished · VVS 186.20 ct In stock
Melee · SI1 12.80 ct Low

Digital Invoicing

Generate GST invoices or quick Cash Sell entries. Professional PDF reports ready to share instantly.

Brokerage & Parties

Detailed broker performance reports. Manage commissions and track due payments effortlessly.

Finance & Reports

Daily ledger for credits, debits and expenses. One-tap year-end summaries and tax reports.

Private & Secure

Your data is encrypted end-to-end and synced across your devices. Only you ever see your books.

The Tour

Crafted screen-by-screen.
Built for speed.

Every screen is engineered for clarity and total control of your trade.

Inventory
Inventory at a Glance

Real-time carat stock with valuation breakdowns.

Invoice
Smart Invoicing

Generate GST or Cash Sell invoices in seconds.

Expenses
Daily Expense Ledger

Track every rupee with categorized expense logs.

Brokers
Broker Insights

Performance reports and commission tracking, simplified.

Purchase
Quick Purchase Entry

Auto-calculated amounts with party and broker details.

Sell Mode
Flexible Sell Modes

Pick a Cash sell or full GST invoice in one tap.

Cash Sell
Cash Sell, Streamlined

Add items, apply discounts, save in seconds.

Workflow

Reduce your workload by 90%.

Stop wasting hours on manual math. Carat One automates your entire trading workflow — so you can focus on dealing diamonds.

Auto-calculated Profit, Loss & Valuation
One-Tap Year-End Reports & Tax Summaries
Secure Digital Ledger for Daily Expenses
Reports
Why Carat One

The old way is tiring.
The new way is here.

The Old WayManual

  • Dusty registers and torn pages that go missing
  • Hours wasted on calculator math every evening
  • Brokerage and commission errors that hurt margins
  • Year-end chaos: reconciling stock and bills by hand
  • No backup — one flood, one fire, one lost book

With Carat OneModern

  • Every entry saved, searchable, and synced in real time
  • All math done automatically — close books in minutes
  • Brokerage tracked per party with precision reports
  • Year-end summary in one tap, GST-ready
  • Encrypted cloud backup — your books, always safe
FAQ

Frequently asked, honestly answered.

Absolutely. Your ledger is encrypted end-to-end and synced only to your account. No one — not even our team — can read your stock or invoice data.
Yes. Carat One generates fully-formatted GST invoices with HSN codes and tax breakdowns, ready to email or share as a PDF.
Yes — the entire app, including labels, reports and invoices, can be switched between English, Hindi and Gujarati from your settings.
Yes. Sign in on any phone, tablet or browser and your books stay perfectly in sync — no manual exports, no email backups.
Carat One is live on the Google Play Store. Tap "Download on Play Store" at the top of the page to install it on your Android device — and you can get started in minutes.

Your modern diamond desk
is one tap away.

Carat One is live on the Google Play Store. Install it on your Android device and start modernizing your diamond desk today.

Download on Play Store See the tour

Get in Touch

Have questions, feedback, or partnership ideas?

Tell us a little about yourself and we'll get back to you within 1 business day.

Encrypted & stored on our secure Firebase backend.