Accounting
Adern Books — Accounting Software
GST-ready accounting and billing built for Indian businesses.
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Production-ready
Already deployed at real customer sites — not vapourware.
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Fully customisable
Take it as-is or have us tailor it to your exact workflow.
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PWA on day one
Installable on phones, works offline, fast on slow networks.
Adern Books is what you are using right now. We built it for our own books and then opened it up — because every accounting tool we tried was either bloated SaaS or stuck in 2010.
What it does
- GST-compliant invoices, credit notes, recurring invoices.
- Client portal with self-renewal and payment collection.
- Expenses with vendor tracking and project allocation.
- Full double-entry general ledger and chart of accounts.
- GSTR-1, GSTR-3B summaries with line-level export.
- Per-tab CSRF, IP/UA/device-bound sessions, audit logs.
- Self-hosted PHP — no vendor lock-in.
Everything that's built
✓
GST invoicing & e-invoice
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Client portal & self-renewal
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Expenses & vendor tracking
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Double-entry ledger
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GSTR-1 / GSTR-3B exports
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Bank reconciliation
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Hardened auth & audit log
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Self-hosted PWA
Built with
PHP 8
MySQL
PWA
Bootstrap
Service Workers
Have a project? Let's build it.
One business-day reply. Honest scope. Real engineers, not account managers.