Can I bill if my internet goes down — does 399Apps work without internet?
Short answer
The 399Apps cloud apps run online, but a broadband outage does not stop your counter — switch to your phone’s mobile data and keep invoicing from any browser. If you need to bill with no internet at all, the same software self-hosts on a local PC or server on your shop’s own network, fully offline, with daily backups either way so nothing is lost.
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Billing when the line drops: 399Apps vs a single desktop PC
How 399Apps handles outages compared with offline desktop software like Tally or Busy. Prices exclude GST.
| Feature | 399Apps | Desktop Tally / Busy |
|---|---|---|
| Bill during a broadband outage | Yes — switch to mobile data, or self-host on your LAN | Yes — fully offline by default |
| Fully offline option | Yes — self-host on your own PC / server | Yes (the default) |
| Bill from a phone if the PC is down | Yes — any browser or phone | No — tied to the installed PC |
| Data if the PC fails, is lost or stolen | Safe — cloud or your own backups | Lost unless you backed it up |
| Backups | Automatic daily, India region (cloud) | Manual — your responsibility |
| Live figures across counters / branches | Yes — synced across devices | No — per-PC, not shared |
Pricing reflects publicly listed plans and is indicative; verify current pricing with each vendor.
What actually happens when your internet drops
The 399Apps cloud apps (Nidhi Books and Nidhi Inventory) are web-based, so the cloud version does need a connection — but in practice a “no internet” moment at the counter is almost always a broadband or Wi-Fi outage, not a total blackout. Every modern smartphone is a backup line: switch the shop device to mobile data (4G/5G) and keep billing from any browser. Billing is light on bandwidth, so even a weak signal is usually enough to raise an invoice.
Because your books live in the cloud with automatic daily backups in an India region, an outage never costs you data. When the connection comes back, everything you billed on mobile data is already saved — there is no re-keying and no lost invoices. And because any device can log in, if the shop PC itself dies you simply open 399Apps on a phone or another computer and carry on.
If you need to bill with no internet at all: self-host
Some shops genuinely cannot depend on any internet — a basement godown, a village outlet, or a counter that must never pause. For them, 399Apps ships the exact same software as a self-hosted package you run on your own computer or a small local server on your shop’s network (LAN). Staff bill against that local server with no internet involved at all, and you keep full data ownership — your database, your backups, your keys.
Self-hosting is custom-quoted rather than the ₹399/month cloud plan, because you are running the server. You can start on cloud and move to self-host later (we migrate your data and credit the unused cloud months), or run self-host now and switch to cloud if your needs change — the data model is identical either way.
Why this beats relying on one offline PC
Desktop software like Tally or Busy is offline by default, which feels safer — until the one PC it lives on fails, is stolen, or is hit by ransomware, and your books go with it. An offline machine still needs you to remember manual backups, and the figures on it are not shared with your other counters or your accountant.
399Apps gives you the offline resilience you want without that single point of failure: bill on mobile data through a broadband outage, self-host locally if you need zero-internet billing, and rely on automatic daily backups and multi-device access so a dead PC is an inconvenience, not a disaster.
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More questions
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