📱 For iPhone & Mac
Utility Costs
made simple
with an app
Manage properties, track expenses, and create utility cost statements based on legal requirements – right on your iPhone or Mac.
Manage properties, track expenses, and create utility cost statements based on legal requirements – right on your iPhone or Mac.
From meter readings to the finished PDF statement – all in one app.
Manage multiple buildings with all units and tenants, clearly organized in one place.
Track electricity, water, and heating meters. Scan readings with the camera – no typing needed.
Log operating costs with date and category – from heating to water to insurance.
NK-App calculates all costs automatically and creates a print-ready utility cost statement as a PDF. Also works for billing periods that don't follow the calendar year.
Automatic split of CO₂ costs between tenant and landlord, based on the German CO₂ Cost Allocation Act.
Photograph invoices – Apple Intelligence automatically detects the amount, date, and category.
No more typing out receipts: photograph an invoice, and Apple Intelligence reads the amount, date, vendor, and category automatically – in seconds, right on your iPhone.
Swipe through the views.
Buildings
Meters
Meter Details
Scan Meter
Expenses
Add Expense
CO₂ Costs
Statements
Statement (CO₂)
PDF Preview
Archive
Germany's CO₂ Cost Allocation Act (CO₂KostAufG) regulates how CO₂ costs must be split between tenants and landlords. NK-App calculates your share automatically, based on §§ 5–7 of the CO₂KostAufG schedule. This does not replace individual legal review.
Start for free – only pay for finished statements.
Download the app and manage everything