The party nobody believed
Music every Friday until 3 AM. You complain to your landlord. Response: "Please provide written proof." Without a log you have nothing – with LärmLog you have date, time and decibel level for every incident.
One-time purchase · No subscription
100% Offline & Private
No audio – only dB values
Your neighbor blasts music until 2 AM – and nobody believes you without written proof.
Your noise log.
On your phone.
Measure noise, log incidents, export PDF – structured, chronological, without secret recordings. The noise diary your landlord and lawyer will understand.
Android only · Free · Premium as a one-time purchase
What LärmLog does
Live Noise Measurement
Capture decibels in real time via your microphone. No audio is recorded or stored – only the dB value goes into your log.
Manual Entry
Start time, end time, category, notes – done. For situations where measuring isn't practical.
"Still awake?" Reminder
A reminder every 10 minutes so no incident goes unrecorded. Auto-stop after 15 minutes of inactivity.
PDF Export (Premium)
Your complete noise log as a table: date, time, duration, category, dB value, notes – unlocked once, usable for life.
Why a noise log matters
Neighbor noise is exhausting – but without written evidence, nobody takes it seriously. Whether you're seeking rent reduction, talking to your landlord, or consulting a lawyer: without complete documentation, you have nothing to stand on. LärmLog closes that gap.
The app logs every incident with date, time, duration, decibel level and a free-text note. Six predefined categories – Music / Parties, Construction, Footsteps / Stomping, Dog Barking, TV / Radio, Other – cover the most common noise sources. All entries are sorted chronologically, unlimited, and stored entirely offline.
No audio is recorded. LärmLog measures only decibel levels – that is the crucial technical and legal distinction from a secret audio recording. The app operates fully within the bounds of the law.
Three situations many tenants know
The child who can't sleep
Shift work or small children – and the neighbor hammers away every morning from seven o'clock. For rent reduction due to construction noise you need timeframe, frequency and intensity. LärmLog delivers exactly that.
The lawyer who needs evidence
Before a lawyer acts, they need facts: when was the noise? How loud? How often? The LärmLog PDF delivers this table – structured, complete, at a glance.
All three situations share the same pattern: without documentation, you lose the argument. With a complete noise diary you have the answer to every question – before it is asked.
100% offline, no audio, no cloud
LärmLog stores all data exclusively on your device. No server, no cloud, no login, no account. The app transmits nothing to the internet.
No audio is recorded or stored. LärmLog measures only decibel values (volume levels) – no voice, no sounds. The app operates outside the scope of wiretapping laws.
Frequently asked questions
Does the noise log support rent reduction?
A complete noise diary with date, time, duration and decibel level supports your case with landlord and lawyer. Whether a rent reduction can be enforced depends on the individual situation – LärmLog helps you document the necessary facts in a structured way.
Does the app work without internet?
Yes, LärmLog works 100% offline. All entries stay exclusively on your device. No server, no cloud, no data sharing.
Are audio recordings stored?
No. LärmLog does not record or store audio. The app only measures the decibel level via the microphone – this is the technical and legal difference from a secret audio recording.
What is included for free?
Free: live noise measurement, manual entries, 6 categories, unlimited entries, chronological list, notes field, 24 EU languages. Premium (one-time purchase): PDF export + ad-free.
In which languages is the app available?
LärmLog is fully translated into 24 languages – all official EU languages.