Contractor delivers late. Flooring uneven. Windows leak. Suddenly he denies everything.
BauTagebuch gives you the tool that professionals have long known: structured defect logging with photos, trade assignment and automatic timestamp – directly on your smartphone, without cloud, without subscription.
Android only · Core features always free
Unlimited defect photos. Every entry automatically receives date and time – tamper-proof storage on your device.
Structural work, building services, interior fitting and more. Add custom trades as free text. Every defect is assigned to the correct trade.
Five phases from site prep to handover. Every entry is precisely classified – no confusion on long construction projects.
Professional PDF at the touch of a button – all photos, timestamps and trade assignments in the document. Use forever.
Builder, site manager, project – complete project data. Witness information directly in the entry.
Dark cellars, unlit rooms, shafts – the integrated torch lights up during documentation.
A house build is the largest financial project in most people's lives. At the same time, it's the project where errors happen most frequently – and are hardest to prove when the contractor denies everything.
German courts recommend timely, structured documentation of building defects. Whoever only records defects weeks later in a memory protocol has a harder time proving when the defect occurred. BauTagebuch solves this problem: every entry automatically receives a timestamp when created. Photos are assigned to trades. The construction phase structure shows in which section of the project a defect appeared.
The result is chronological documentation that you can export to PDF at any time – structured, complete, traceable. What a court or expert thinks of it in a specific case is outside the app. But complete documentation is the foundation for any next step.
The flooring is uneven. The windows don't close tight. The structural work has cracks. As soon as you see the defect, photograph it – with trade assignment and automatic timestamp. BauTagebuch creates a structured protocol showing what appeared when.
At handover everything must go fast. With BauTagebuch you capture defects directly on site via photo and assign them immediately to the correct trade. The finished PDF log contains all entries sorted by construction phase and trade – ready for handover documentation.
Sometimes clients make demands after completion that don't match the actual condition at handover. With BauTagebuch, contractors document their own work in a structured way – photos of completed trade, timestamps, construction phase. Own documentation as evidence of condition at handover.
Construction projects contain sensitive data: master data, defect photos, information about involved companies. All that belongs to you – and only you.
BauTagebuch stores all data exclusively locally on your device. There is no cloud connection, no account, no registration, no data sharing with third parties. The app works completely without internet connection – even on the construction site with poor reception.
Three months after the flooring is laid, you notice: the floor is uneven in several places. The flooring contractor says it was already that way at move-in – and you can't prove otherwise. With a photo right after installation, classified under "Structural work" and equipped with automatic timestamp, things look different.
At handover everything goes fast. Signatures, key handover, done. Two weeks later, cracks appear in the plaster. The painting company says they weren't there at handover. Without a complete defect log with photos and timestamps from the handover period, you have a hard time proving otherwise.
Two years after move-in, water damage appears. The plumbing company claims it wasn't responsible for that area. With chronological documentation from the construction phase – including photos and trade assignment – you can show which tradesperson worked when in which area.
All three situations have the same pattern: whoever doesn't document stands without evidence. BauTagebuch gives you the tool to record from the beginning what happens on your construction site.
What is BauTagebuch?
BauTagebuch is an Android app for builders, architects and construction companies. You document building defects in a structured way via photo, trade assignment and automatic timestamp – without cloud, without account, without subscription.
Does the app work without internet?
Yes, completely. All photos and entries remain exclusively on your device. BauTagebuch doesn't need an internet connection – not even for PDF export.
What does PDF export cost?
Core features are permanently free with no limits. No subscription, no monthly fees. Use unlimited for all your construction projects.
Which trades are supported?
BauTagebuch includes predefined trades like structural work, building services and interior fitting. Additionally you can add custom trades as free text. The construction phase structure covers five phases – from site prep to handover.
What about data protection?
All data stays local on your device. There is no cloud connection, no registration and no data sharing. BauTagebuch does not send any data to servers.
Can I use the documentation in disputes?
BauTagebuch creates chronological documentation with photo and timestamp, structured by trade and construction phase. Whether such documentation is sufficient in a specific legal dispute is decided by a court or expert on a case-by-case basis.