Invoice Biz: Expense Tracker is a free iPhone and Android app that tracks customer credit balances in a digital ledger, records full and partial payments against each account, and sends WhatsApp payment reminders with one tap — no spreadsheet or account required.
If you run a small business, you already know the uncomfortable truth about customer credit: the money is technically yours, but until it's actually paid, it doesn't pay your bills. Keeping track of who owes what — across multiple customers, partial payments, and different currencies — is one of the most stressful parts of running a business.
Most small business owners manage this with a spreadsheet, a notebook, or their memory. All three are unreliable. Here's a better way.
What does poor accounts receivable tracking actually cost your business?
Accounts receivable (AR) is the money customers owe you for goods or services already delivered. Poor AR tracking leads to real, measurable problems:
- Forgotten balances — customers who should have paid months ago, still carrying a balance you never followed up on
- Cash flow gaps — you can't pay your own suppliers because you're waiting on money that's technically already earned
- Relationship awkwardness — following up on overdue payments without clear records to reference
- Lost revenue — in many small businesses, a percentage of informal credit simply goes uncollected
The fix isn't complicated — it's consistency. You need a system that makes it effortless to record every credit transaction and follow up on every outstanding balance.
What does a customer credit ledger do, and why do you need one?
A customer credit ledger is a running record of what each customer owes you. Every time you extend credit (sell on account), record a payment, or add a manual transaction, it updates the customer's balance automatically.
The key features of a good credit ledger:
- Instant view of every customer's outstanding balance
- Support for full and partial payments
- Manual credit entries for sales made outside of formal invoices
- The ability to follow up directly from the app
Invoice Biz builds exactly this into its free iPhone and Android app, under a feature called the Udhaar Credit Ledger — the term widely used across South Asia for informal customer credit, now digitized for any business anywhere in the world.
| Manual Accounts Receivable | Digital Credit Ledger |
|---|---|
| Tracked in a notebook or spreadsheet, updated manually | Every credit and payment recorded digitally; balance updates automatically |
| Payment reminders made by phone call or in person | WhatsApp payment reminder sent with one tap directly from the app |
| Partial payments noted loosely, easy to lose track | Partial payments logged against the account; remaining balance always current |
| Outstanding balances visible only after checking notes | Every customer's outstanding balance visible instantly on the ledger screen |
| Disputes resolved by memory or handwritten records | Full transaction history per customer available at any time |
| Month-end reconciliation takes hours | Balances always reconciled in real time — no batch processing needed |
How does the customer credit ledger work in Invoice Biz?
Step 1 — Add a customer credit entry
When a customer takes goods or services on credit, you record it immediately in the Udhaar ledger. Takes seconds. No invoice required — this is useful for informal sales that don't warrant a formal invoice.
Step 2 — Record payments as they come in
When a customer pays — in full or partially — you log the payment against their account. Their outstanding balance updates automatically.
Step 3 — See the full picture at a glance
The credit ledger shows every customer's current balance clearly. You can see at a glance who owes you the most, who's current, and who's overdue.
Step 4 — Send a payment reminder via WhatsApp
With one tap, you can send a payment reminder to any customer directly through WhatsApp. No copying numbers, no typing messages — the app handles it. This feature alone recovers more outstanding payments than most business owners expect.
Can I track customer credit balances in multiple currencies?
If you work with customers in different countries or deal in multiple currencies, the app tracks outstanding balances per currency separately — so there's no confusion between dollars, pounds, euros, or any other currency your customers pay in.
How does the credit ledger connect to your invoicing and profit reports?
Because the credit ledger lives inside the same app as your invoicing and expense tracking, everything connects. Your accounts receivable shows up in your Balance Sheet view alongside assets, revenue, and expenses. Your Profit & Loss report reflects reality — not just what's been invoiced, but what's actually been paid.
This is the kind of financial visibility that most small business owners don't have until they actively build a system for it.
Is Invoice Biz free to start, with no account needed?
Invoice Biz is free to download on iPhone and Android. The Udhaar credit ledger, customer payment tracking, and WhatsApp reminders are available with the Pro upgrade — either as a $1.99/month subscription, $9.99/year, or a one-time $15.99 lifetime purchase.
No account creation, no data shared with third parties, no spreadsheet required.
Frequently Asked Questions
How do I track what customers owe me without a spreadsheet?
Invoice Biz provides a digital customer credit ledger that tracks every customer's outstanding balance automatically — you record a credit entry when goods or services are provided on account, log payments as they arrive, and the app keeps a running balance per customer with no spreadsheet required.
Can I send payment reminders through WhatsApp?
Yes — Invoice Biz lets you send a payment reminder to any customer directly through WhatsApp with a single tap, without copying numbers or typing messages manually. This feature is available with the Pro upgrade and works for both partial and full outstanding balances.
Does Invoice Biz record partial payments?
Yes — the app supports partial payment recording against any customer account, updating the outstanding balance automatically each time a payment is logged. This means you always have an accurate picture of what remains owed, even across multiple installments.
How do I see which clients are overdue?
The customer credit ledger in Invoice Biz displays every customer's current outstanding balance clearly in one screen, making it straightforward to see which clients have unpaid balances and prioritize follow-up actions or WhatsApp reminders accordingly.