Your whole building on one screen.

The first time you open the app it asks four things, and nothing else. There is no registration, no OTP and no email at this stage.

1. Property type. Residential, Commercial, Industrial, Land or Special Purpose. This only changes the wording the app uses — flats, shops, units or plots.
2. Property name. Whatever you call the building. It prints at the top of every receipt.
3. Address. Type it the way you would write it on a letter.
4. Owner name. Yours, or whoever signs the receipts.

All four can be changed later from Property Settings on the home screen. You can type in Bangla here if you have Avro or Ridmik installed — the app accepts either script in any field.

Open Tenants and tap Add Tenant. The unit number is yours to choose — A1, B2, Shop 3, Plot 7, anything. The app does not assume a fixed number of flats.

For each tenant you can record the photo, NID number, mobile, permanent address, number of family members, the advance you are holding, the move-in date, and the maid's name and mobile. Only the name and unit are required; fill the rest when you have it.

The rent is entered as four separate figures — rent, service charge, gas and water — so the receipt can show the breakdown. Parking is added from the Parking module instead.

When a tenant leaves, use Move Out rather than Delete. They move to Past Tenants with their move-out date, and you keep the file.

This is the rhythm the app is built around.

1. Early in the month, enter the electricity readings so each flat's bill is known.
2. As tenants pay, open Accounts, tap the flat, enter the amount received and print the receipt. Part payments are fine — the rest carries forward.
3. Record what you spent in Owner as it happens, by category.
4. When the month is finished, tap Close this month. Unpaid amounts move forward as Previous Due, extra payments move forward as Credit, and the month is filed under Past Months.

You do not have to close on the last day. If you forget July and only remember in September, the app lets you close July first, then August, in order, so nothing is lost. The Close button simply will not let you close a month that has not finished yet.

Electricity has two screens: Electricity Meters for this month's readings, and Past Bills for everything already billed.

Register each sub-meter once with its number and the flat it belongs to. Every month you enter the new reading date and the new reading; the app fills in the previous reading, works out the units used and calculates the amount from the tariff you have set.

Because the meter reader records every meter on the same day, setting the reading date on the mother meter sets it on all the others at once.

When you save a bill it posts straight into that flat's row in Accounts, so you never type the same figure twice. If a meter is replaced, use Replace rather than Delete — the old meter is archived and its old bills stay readable.

Every receipt offers four ways out: the Bluetooth printer, Print for an A4 page, JPG, and PDF. JPG and PDF open your phone's share sheet, so you can save the file or send it straight to the tenant on WhatsApp or imo.

Set the paper size once on the home screen — A4, Thermal 58mm or Thermal 80mm — and every print after that uses it.

To pair a thermal printer, switch the printer on, turn Bluetooth on, and tap Bluetooth Printer on the home screen. Pick your printer from the list. If it says connect failed, the printer is almost certainly still connected to another phone — turn Bluetooth off on that one first.

Receipt History keeps every receipt you have generated, searchable by month and year.

Open any tenant and you get the same four buttons. The sheet prints the photo, full name, flat and floor, NID, mobile, permanent address, family members and move-in date — the exact set a police verification officer asks for.

Past tenants print the same sheet with the move-out date added.

On the Android app, Property Settings has Backup and Restore. Backup writes a single file containing everything — tenants, accounts, meters, bills, expenses, parking, settings. Save it wherever you keep things: Google Drive, your email, a pen drive.

On a new phone, install the app, tap Restore and pick the file. Everything comes back exactly as it was.

Android's own backup is also switched on, so if you set up a new phone from a Google backup the app's data normally comes with it. Do not rely on that alone — take the file backup at the end of every month. It takes ten seconds.

Once the web version opens, a cloud account will do this for you — your ledger will already be on every device you have signed in to. Until then, the backup file is how you keep it safe.

Property Settings has a Language option. Choose বাংলা and every screen, button, label and printed receipt switches over. Choose English and it switches back. Nothing you have already typed is affected.

To type Bangla you need a Bangla keyboard on your phone — Avro Keyboard or Ridmik Keyboard, both free. The app accepts Bangla and English in the same field, so you can write a tenant's name in Bangla and their NID in digits.

Every one of the six modules keeps your last action. If you delete the wrong tenant, enter a payment against the wrong flat or close a month too early, an Undo bar appears at the top of that module. Tap it and the change is reversed.

Undo holds the most recent action only, so use it straight away rather than later.