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SIR: Simple Invoice Maker, Receipt Creator & Inventory Tracker


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Customize your invoices and send them on the go! Add discount, tax, advance payment, signatures and photo attachments.
You won’t find a better invoicing app anywhere else online. Customize your invoices and send them on the go!

Create instant invoices via our professional invoice maker with in-built attractive templates to include your company logo, brand color, payment details, and much more information. Add discount, tax, advance payment, signatures and photo attachments.

Send invoices quickly before leaving your customer.

Also, SIR is the only app that allows users to add multiple businesses and warehouses, and assign multiple users with access from various devices.

Inventory management includes tracking, recording, and stock updating, which is all very easy.

Our inventory tracker will alert you with low stock reminders.

Available on iPhones, iPad’s, Android phones, & Tablets. (Web app coming soon with Razorpay Integration and a host of other features……Development started)

Check out these great features of the app.

Create professional estimates that guarantee you get the job.

Track estimates status.

SIR converts estimates to invoices with just one click.

Instantly create purchase orders & smart receipts once you receive payment.

Easily keep track of all unpaid invoices.

Within mere seconds, you’ll be able to create your very own invoices and estimates.

SIR notifies you immediately if your invoice has been opened and seen by your customer.

Get notified for unpaid and overdue invoices.

Send in-built professionally designed invoice due reminders to your clients.

Tracking invoices and receivables has never been so easy. SIR does it all for you.

When your invoice is seen or paid, SIR will notify you.

Accept online or in-person payments via credit card, debit card, Stripe, or PayPal and get paid faster.

SIR is comparable to Square Point of Sale (POS), PayPal Business, and other payment systems.

You can also send invoices with payment links to enable customers to pay online as per their convenience.

Once an invoice has been paid through the in-built POS feature or through the payment links accompanied with a shared invoice, invoice status will change automatically to paid within the app.

Stripe & PayPal integration available. Razorpay integration coming soon in Web app (development initiated)

You truly can control your entire business operation right from your own pocket!

SIR helps you manage your business effectively and efficiently.

It is a perfect complement to other invoice maker apps, such as Invoice Simple, Bookipi – Billing Estimate, Invoice2go, Tiny Invoice, Easy Invoice Maker, Billdu, Zoho Inventory, QSR Inventory, Freshbooks, Xactimate, Invoice Home, Invoice Bee, Wave Receipts, Billdu, and more.

Get invoicing right away.

Reduce your time and stress, and make billing your customers the simplest thing you do all day with the best invoice and estimate app available.

Get lifetime access to SIR App today!

Plans & features

Deal terms & conditions
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    Lifetime access to SIR: Stock Tracker, Invoice Maker, & Receipt Creator

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    You must redeem your code(s) within 60 days of purchase

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    All future plan updates

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    Please note: This deal is not stackable

Specification: SIR: Simple Invoice Maker, Receipt Creator & Inventory Tracker


Unlimited users
Unlimited businesses
Unlimited invoices
Unlimited receipts
Unlimited product inventory tracking
Unlimited estimates
Unlimited purchase orders
Unlimited items & products
Unlimited customers & suppliers
Stripe & PayPal integrations
Add payment details to invoices
In-built POS
Send professionally-designed invoice reminders
Send automated thank-you notes to customers
Share documents via email, WhatsApp, or any other channel
Track unpaid & overdue invoices
Multiple automated reports
Multiple warehouses
Multiple languages
Available on iOS and Android

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SIR: Simple Invoice Maker, Receipt Creator & Inventory Tracker
SIR: Simple Invoice Maker, Receipt Creator & Inventory Tracker


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