About this app
What Genny does
If you run a generator at home or in your shop, you already know the question that never gets a straight answer: how much is this gen actually costing me every month? Fuel goes in by the jerrycan, hours pile up unnoticed, the mechanic shows up whenever the engine starts knocking — and at the end of the month all you know is that money left. Genny is a pocket logbook built for exactly this life. Add each generator you run — the big diesel gen and the small 'I better pass my neighbour' both get their own page. Every time you buy fuel, log the litres and the naira; every time the gen runs, tap start and stop or enter the hours yourself. From those two simple habits Genny works out the numbers nobody works out by hand: price per litre over time, litres burned per hour, and the true naira-per-hour cost of running each machine. Servicing stops being guesswork too. Set intervals in engine hours — oil change every 100 hours, plug and filter checks on whatever schedule your gen needs — and Genny counts down from your real recorded runtime, flagging what is due before small neglect becomes a big repair bill. Then the monthly report puts it all together: total fuel spend, servicing spend, hours run, and a side-by-side comparison with what you loaded on your prepaid meter, so you can finally see whether the gen or the grid is eating more of your money — and whether that solar quote actually makes sense. Genny is 100% offline. No account, no sign-up, no data leaving your phone — everything is stored on-device with SwiftData, so it works perfectly even when there is no light and no data. • Multiple generators, each with its own fuel, hours and cost history • Fuel purchase log in naira with price-per-litre trends • Start/stop runtime sessions or manual hour entry • Automatic litres-per-hour and naira-per-hour figures • Maintenance intervals counted in real engine hours • Monthly gen spend vs prepaid grid spend comparison • Fully offline and private — no account, nothing synced Download Genny and find out, in plain naira, what your generator really costs to run.
Features
Built to be useful, not noisy.
Generator ledger
Add each generator (name, fuel type, capacity in kVA, tank size); the home screen shows per-gen lifetime hours, total spend and current naira-per-hour at a glance.
Fuel purchase log
Log each petrol or diesel purchase with litres, total naira paid and date; Genny computes price per litre, charts price trends and rolls purchases into monthly fuel spend per generator.
Runtime sessions
A start/stop session timer plus manual hour entry records when and how long each gen ran; sessions feed lifetime engine hours, litres-per-hour and cost-per-hour calculations.
Service & spend report
Hour-based maintenance tasks (oil, plugs, filters) count down from recorded runtime with due/overdue badges; a monthly report totals fuel plus servicing and compares it against user-entered prepaid grid top-ups.
Why it exists
The problem
With petrol above ₦1,500/litre in parts of Nigeria and millions of households relying on generators, gen owners pour money into fuel and repairs with zero visibility: no runtime record means oil changes are missed (engines should be serviced roughly every 100 run-hours), no fuel log means price swings go unnoticed, an…
What's different
How Genny stands out
Unlike Loadwise, which is about load-shedding schedules and outage readiness, Genny ignores timetables entirely and owns the money side: a per-generator ledger of fuel purchases, engine hours, naira-per-hour cost and hour-based service intervals, plus a monthly gen-vs-grid spend comparison. Unlike Fuelbook (vehicle mi…
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FAQ
Questions about Genny
How much does Genny cost?▾
Genny is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does Genny store my data?▾
On your device. Genny is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does Genny support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for Genny?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.
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