MOPX 2.0: rebuilt from the ground up for small shops

Summary: MOPX started in March 2025 as “MOB App”, a simple first version. In August 2026 it was rebuilt as MOPX 2.0 with a proper database, safer billing and a new look. By September 2026 (versions 2.1 to 2.5) it had backups, credit, purchases, reports and printer support.

Where it started (March 2025)

A first version called “MOB App”: a dashboard, a screen to add items, a stock list and a billing screen.
Data was kept in simple app storage, and a bill and its stock change were saved separately, so a crash at the wrong moment could leave them out of step.

MOPX 2.0.0 (7–9 August 2026): the rebuild

New name: MOPX.
A real database on the phone (SQLite). Products, stock, bills, payments and history now live in one database inside the app’s private storage.
Every bill is saved all-or-nothing. The bill, its items, the payment and the stock change are written together, or not at all.
Every stock change is recorded. Sales, restocks and corrections each leave a stock movement, so stock can be traced.
Old data moved over automatically. Shops that used the old app kept their products and bills; the old data was never deleted.
New look. Bottom tabs for the main screens, large buttons for fast billing, light and dark themes.
Prepared for Google Play, with its own signing key.

MOPX 2.1 to 2.4 (September 2026): the tools a shop needs

Backup and restore. One backup file with the whole shop, including product photos and unfinished bills, locked with a password (AES-256-GCM encryption). Restore checks the file before replacing anything, and keeps a safety copy first. Optional backup reminders.
Park a bill and come back to it. Serve the next customer, then resume.
Purchases and suppliers. Record stock you receive and what you paid; MOPX keeps an average buying cost.
Profit reports. Sales, profit where the buying cost is known (it never guesses missing costs), stock value, money collected and money still owed.
Split payments. Cash, UPI and card on one bill, with the change to return.
Credit (udhaar). Customer name and phone, due date, overdue list, and payments in installments.
Units. Sell by piece, kg, litre and more, with decimals for loose goods.
Import products from a spreadsheet (CSV), with a preview and errors shown before anything is saved.
Receipts. Share as PDF, print with Android’s print screen, or print on Bluetooth or network thermal printers (58 mm and 80 mm).

MOPX 2.5.0 to 2.5.2 (19–20 September 2026): faster billing

Search inside the bill, by name or price, forgiving one typo per word (“bisuits”).
Compact cart rows, about a third shorter, with the newest item on top.
“Already in the bill” markers in the product list, with the quantity.
Save explains itself: if a product can’t be saved, a red line says exactly why.
Shop address and phone with icons on receipts and PDFs.
Press back twice to leave the app from Home.
A smaller app (2.5.2).

Why it matters

Billing is the one thing a shop can’t get wrong. Since 2.0, a bill and its stock change can never get out of step.
Everything works without internet. The shop’s data stays on the phone.