Web app · Finance
Genny
Find out, in plain naira, what your generator really costs to run
Log fuel by the litre and hours by the timer, and Genny works out price per litre, litres per hour, naira per hour, hour-based service countdowns and a monthly gen-vs-prepaid-grid comparison. Free, no account.
Stored in your browser only. Nothing you do in the web version is sent to our servers. Clear your browser data and it's gone — so export a backup from the in-app menu if you want to keep it.
This app is a community proposal.
Try the full browser version now. We build the iPhone and Android app once 100 people upvote it.
We'll email you once, when it ships. Unsubscribe anytime.
In your browser
What you can do in Genny on the web
A ledger per gen
The big diesel and the small "I better pass my neighbour" each get their own fuel, hours, servicing and cost-per-hour history.
Fuel log in naira
Litres and total paid per jerrycan or pump visit; Genny charts price per litre over time and totals your fuel spend.
Start/stop runtime or type the hours
A live timer for the hours the gen is actually on, plus manual entry for the nights you forgot — both feed engine hours.
Litres and naira per hour
Fuel plus servicing divided by real recorded runtime — the number nobody works out by hand.
Servicing counted in engine hours
Oil every 100 hours, plugs, filters and coolant, counted down from what the gen really did, with due-soon and overdue meters.
Gen vs prepaid grid
Fuel plus servicing against what you loaded on the meter, with a three-month comparison and your effective grid tariff per unit.
Screens
Every screen, rebuilt for the browser
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1
Gens
Cost of light in the last 30 days, fleet cost per hour, every generator with its engine hours and service badge.
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2
Gen vs grid report
Fuel, servicing, hours and litres over 30 days, a three-month gen-vs-grid comparison and your prepaid top-ups.
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3
Servicing
Every hour-based service task with a fill meter, hours to go, and a mark-serviced flow that logs the cost.
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4
Generator
Naira per hour, engine hours, litres per hour, fuel and service spend, timer, and links to the fuel log and servicing.
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5
Generator setup
Name, fuel type, kVA, tank size and the hours already on the meter — a service schedule is created with it.
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6
Fuel log
Price-per-litre trend, average naira per litre, and every purchase with vendor and date.
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7
Runtime
A start/stop timer per gen, hours per week, and the full session history.
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8
Settings
Your gens, service flagging, CSV export, backup, sample data and erase.
Try it with sample data: Loads two generators — a 10 kVA Perkins diesel and a 2.5 kVA Elepaq petrol — with thirteen fuel purchases, nineteen runtime sessions across ten weeks, six service tasks (one already overdue) and five prepaid meter top-ups. You can start fresh at any time.
Ready? It's free.
No account, no install, no subscription. Everything you do stays in this browser.
Your say
What should Genny do? Tell us before we build it.
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Questions
Is the web version of Genny free?+
Yes. Every screen is free to use: no subscription, no in-app purchases, no account.
Do I need an account?+
No. Open Genny and start using it right away. Sign in with Google only if you want to upvote an app, save it to your list, or leave a comment.
Where is my data stored?+
Only in this browser's local storage. Nothing you enter is sent to our servers, so we can't see it, back it up, or restore it. Clearing site data, a private window, or another device starts empty. Export a backup from the in-app menu to keep it.
Is there a Genny app for iPhone or Android?+
Not yet. Genny is a community proposal: the browser version is complete, and we build the iPhone and Android app once 100 people upvote it. Upvoters get one email when it ships.