Meet GasBook — Know when your LPG runs out

Utilities

GasBook

Know when your LPG runs out

What GasBook does

The cylinder always dies in the middle of dinner. GasBook is the offline companion for every Indian household that cooks on LPG — it learns how fast your family actually burns gas and shows a live countdown of the days left in your cylinder, so you book the refill before the flame sputters out, not after.

Official booking apps take your order; none of them tell you when to place it. A fixed calendar reminder cannot help either, because no two households burn gas the same way — a family of five cooking three meals a day empties a 14.2 kg cylinder in 20 days, while a working couple stretches the same cylinder past 35. GasBook does the math from your own refill history. Log each new cylinder when it arrives and mark the day the old one ran out; within two or three cycles the app knows your household's kg-per-day rate, and the countdown gets sharper with every refill. On day one it starts from a sensible family-size estimate, so the screen is never blank.

GasBook also knows the rules you have to plan around. Domestic refills follow minimum booking-gap rules, and your dealer takes days to deliver. The app tracks your dealer's real delivery lag from your own bookings and works backwards from the predicted empty date to one clear book-by day — with a gentle notification so a five-day delivery delay never leaves your kitchen cold.

Every refill's price, and any subsidy amount credited to your account, goes into a running ledger. See exactly what cooking gas costs your family each month and each year, and keep your own record of whether each credit actually landed. If a cylinder empties far faster than your normal burn rate, GasBook raises a short-fill flag so you have dates and numbers in hand when you call the agency.

Homes with a backup cylinder get a rotation tracker: which cylinder is on the stove, which is in reserve, when you swapped, and when the reserve itself will run dry.

Fully offline and private. No login, no OTP, no consumer number — just your kitchen's gas, finally predictable.

• Live days-of-gas-left countdown learned from your real burn rate • Book-by date that factors booking-gap rules and your dealer's delivery lag • Refill log with price and subsidy-credit ledger, exportable as PDF or CSV • Short-fill flag when a cylinder empties abnormally fast • Double-cylinder rotation tracker for backup-cylinder homes • Supports 14.2 kg, 5 kg, 10 kg and 19 kg cylinders • Works fully offline — no account, no OTP, nothing leaves your phone

A look inside

Tap any screenshot to open the full-resolution version.

What's inside

• Days-Left Countdown — A live gauge of days of gas remaining in the cylinder on the stove, computed from the household's learned kg-per-day burn rate; starts from a family-size estimate and sharpens with every completed refill cycle.
• Refill Log — Ten-second logging of each cylinder cycle: booked date, delivered date, price paid, subsidy credited, and the day the previous cylinder ran empty — the history that powers every prediction.
• Booking Planner — Works backwards from the predicted empty date using the dealer's historical delivery lag and the 25/45-day booking-gap rules to one clear book-by date, with an eligibility window and a reminder notification.
• Price & Subsidy Ledger — A running ledger of every refill's price and subsidy credit with monthly and yearly totals — the household's cooking-fuel spending record, exportable as PDF or CSV.
• Cylinder Rotation & Short-Fill Check — For double-cylinder homes: tracks which cylinder is on the stove and which is in reserve, logs swap dates, and flags any cylinder that empties abnormally faster than the household's normal burn rate.

Why we built it

A 14.2 kg LPG cylinder lasts an unpredictable 18-35 days and routinely dies mid-cooking, with a 2-6 day refill delivery lag. Households have no way to know how many days of gas are left, when they become booking-eligible again under the 25/45-day gap rules, whether the last cylinder was short-filled, or what their gas…

What makes it different

The official Indane / HP Gas / Bharatgas apps are OTP-gated booking-and-subsidy portals with zero consumption tracking or empty-date prediction; MyLPG AI pitches exactly this pain but is a web/Android novelty with no iOS app and no refill/price/subsidy ledger. Versus Apple Reminders (the free killer): a fixed every-30…

Who it's for

Anyone who values a small, sharp, single-purpose tool that does one job well and stays out of the way.

In one line: Know when your LPG runs out

Try it

See the Know when your LPG runs out for the full feature list, the info table, and support links.

Use GasBook, found a bug, or have a feature request? Comments are open below — anonymous is fine.