Can the Acavya fee counter keep collecting when the internet or power is down?

Who is it for, and what hurts today?

• Owner: if the counter goes down on the first of the month, you are out. That fear is why this page exists.
• Accountant or fee clerk: a power cut at 11 am with a queue of parents, then a hand-written receipt that must be typed in later and a count that does not match at 6 pm.
• School in a Tier-2 or Tier-3 town: an old office PC, a dot-matrix printer on pre-printed stationery and a patchy connection.
• Auditor or trustee: a worry that offline receipts are an opening for fraud, such as a printed provisional receipt and cash in a pocket.

What can it do?

• Available now: Each counter device is registered and given a pre-allocated block of receipt numbers, so two counters can never issue the same number even when neither is online.
• Available now: Provisional receipts carry a QR signed by the device; when the device syncs, they become final receipts in the gapless series.
• Available now: Cash and cheque only while offline. A UPI amount entered offline is recorded as unverified until it is matched to a bank statement or a gateway settlement.
• Available now: Day-close is blocked while any registered device has unsynced receipts, unless the owner approves an audited override with a step-up OTP.
• Available now: Printing on thermal 58 and 80 mm, A5 and A4, and on dot-matrix pre-printed stationery; the browser print path is the fallback.
• Available now: Cash controls: payments of Rs 2 lakh or more in cash are blocked per payer per day, per transaction and per event or course, from the rule pack. A denomination count, variance and a signed daily cash close.
• Available now: Attendance and marks entry also work offline and sync later; see attendance.
• Available now: Android Bluetooth receipt printing in the mobile app.
• Planned: A Windows desktop counter app with silent thermal printing, a barcode scanner and a Tally bridge.

How does it work?

Does it work in Hindi, offline and on WhatsApp?

• Receipts can be printed in Hindi or English and sent on WhatsApp once the device is back online.
• The 20-second counter flow (search, collect, print) is a design target that we test; it is not a guarantee for every machine.
• An older Windows 7 office PC can use the PWA in the last browser it supports, with a warning, or an Android device can be the counter.

What can it not do?

• UPI cannot be verified offline, so it stays unverified until matched.
• A lost or stolen device can still hold unsynced provisional receipts. The unsynced-number report and the day-close block exist to surface that, and the owner can revoke a device from the device list.
• We have not yet verified every printer model; confirm your printer model during your demo.
• Offline mode protects collection, not every module: parent payments online need a connection.