Nebenkosten-Check app icon

Don't overpay your utilities.

Offline utility-bill checker — enter your Nebenkostenabrechnung and automatically flag items that aren't allowed, then generate an objection PDF.

▶ Coming Soon on Google Play See Features
Why Nebenkosten-Check

Built for the Job. 🧾

Nebenkosten-Check checks your annual utility bill (Nebenkostenabrechnung) against the BetrKV/HeizkostenV rules and automatically flags items that aren't allowed — like administration costs or repair reserves. With one tap you get an objection PDF, because 80–90% of all bills contain errors.

Bill Entry

Enter your statement's line items and the app does the rest.

Auto-Flag Unfair Items

Automatically marks items that aren't allowed under BetrKV / HeizkostenV.

Legal Citations

Every flagged item cites the exact regulation (BetrKV / HeizkostenV).

Objection PDF

Generate a ready-to-send objection letter for DE/AT/CH.

Deadline Banner

A 12-month objection deadline reminder so you never miss the window.

Benchmark Comparison

Compare your bill against the Heizspiegel / DMB benchmark.

Key Features

Everything You Need

  • Enter line items or paste the plain text of your bill
  • Automatic flagging of inadmissible items (BetrKV)
  • Legal citations per item (§556 BGB · §16 MRG · OR 269/270)
  • Heizspiegel / DMB benchmark comparison with verdict badge
  • Overpayment estimate & 12-month objection-deadline banner
  • OCR receipt scan (on-device ML Kit) & meter-reading log
  • PDF objection letter (DE/AT/CH)
  • 100% offline & private — no account, no cloud, GDPR-safe
Who It's For

Built for You

Tenants in Germany, Austria and Switzerland (over 20 million households) who don't want to blindly pay their annual bill.

No monthly cloud fees. No complicated software. No training required. Just open the app, do the work, and keep your data on your device.

Pricing

Simple, Honest Pricing

Coming Soon
One-time €4.99 per check
Planned pricing — cancel anytime, no lock-in

Full access to every feature — all offline, all private. Planned pricing; the app is coming soon.

▶ Coming Soon on Google Play
FAQ

Frequently Asked Questions

What is Nebenkosten-Check?
Nebenkosten-Check is an offline Utility Bill Check app. Nebenkosten-Check checks your annual utility bill (Nebenkostenabrechnung) against the BetrKV/HeizkostenV rules and automatically flags items that aren't allowed — like administration costs or repair reserves. With one tap you get an objection PDF, because 80–90% of all bills contain errors.
Does Nebenkosten-Check work offline?
Yes. Nebenkosten-Check is 100% offline. Everything is stored on your own device — no account, no cloud, no data collection — so it works anywhere, even without signal.
Is Nebenkosten-Check GDPR-compliant and private?
Yes. Nebenkosten-Check is private by design: no account, no cloud sync, no tracking and no analytics. All data stays on your device, so no third party ever sees your data — GDPR-safe by architecture, not by policy.
How much does Nebenkosten-Check cost?
Nebenkosten-Check will cost One-time €4.99 per check (planned, one-time).
Who is Nebenkosten-Check for?
Tenants in Germany, Austria and Switzerland (over 20 million households) who don't want to blindly pay their annual bill.

Be First in Line

Offline utility-bill checker — enter your Nebenkostenabrechnung and automatically flag items that aren't allowed, then generate an objection PDF.

▶ Coming Soon on Google Play Explore All Apps →