The construction company delivers late. The surface is not flat. Windows don't close properly. And suddenly he denies everything.
BauTagebuch gives you the tool that professionals have known for a long time: structured defect recording with photo, trade assignment, and automatic timestamp — right on your smartphone, without cloud, without subscription.
Android Only · Core Features Free Forever
Capture defects without limits. Every entry automatically gets date and time — tamper-proof storage on your device.
Structure, Engineering, Finishing, and more. Add custom trades as free text. Defects always assigned correctly.
Five phases from start to completion. Each entry precisely organized — no chaos in long building projects.
Professional PDF with one click — all photos, timestamps, and trade assignments in the document. Use forever.
Owner, Project Manager, Project — complete master data. Record witness information directly in the entry.
Dark cellars, unlit rooms, utility shafts — integrated flashlight illuminates while documenting.
Building construction is the largest financial project in most people's lives. At the same time, it's the project where errors happen most often — and are hardest to prove when the contractor denies everything.
Court rulings recommend timely and structured documentation of construction defects. Those who record defects weeks later from memory have a harder time proving when they occurred. BauTagebuch solves this: every entry automatically gets a timestamp. Photos are assigned to trades. The phase structure shows which stage of the project a defect appeared in.
The result is a chronological record you can export as PDF anytime — 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 every next step.
The surface isn't smooth. Windows don't close. The structure has cracks. As soon as you spot the defect, take a photo — with trade assignment and automatic timestamp. BauTagebuch creates a structured record showing what happened and when.
At handover everything must go fast. With BauTagebuch, record defects on-site with photos and immediately assign the correct trade. The finished PDF log contains all entries sorted by phase and trade — ready for handover documentation.
Sometimes customers make claims after completion that don't match the actual condition at handover. With BauTagebuch, construction companies document their work structurally — photos of completed trades, timestamp, phase. Personal documentation as proof of condition at handover.
Construction projects contain sensitive data: master data, defect photos, information about involved contractors. All this is yours — and only yours.
BauTagebuch stores all data exclusively locally on your device. No cloud sync, no account, no registration, no data sharing. The app works completely without internet — even on the building site with poor reception.
Three months after installation, the surface isn't smooth in several places. The installation contractor says it was like that at handover — and you can't prove otherwise. With a photo right after installation, filed under "Finishing" and with automatic timestamp, things look different.
At handover everything happens fast. Signatures, key transfer, done. Two weeks later cracks appear in the wall. The painting company says they weren't there at handover. Without a complete record with photos and timestamps from the handover period, it's hard to prove otherwise.
Two years after completion, water damage appears. The plumbing company denies responsibility for that area. With chronological documentation from the construction phase — including photos and trade assignment — you can trace which tradesperson worked where and when.
All three cases follow the same pattern: those who don't document end up without proof. BauTagebuch gives you the tool to structurally record from the start what happens on your building site.
What Is BauTagebuch?
BauTagebuch is an Android app for owners, architects, and construction companies to record defects structurally: photo, trade, automatic timestamp — without cloud, without account, without subscription.
Does the App Work Without Internet?
Yes, completely. All photos and entries stay only on your device. BauTagebuch doesn't need internet connection — not even for PDF export.
How Much Does PDF Export Cost?
Core features are free and unlimited. No subscription, no monthly fees. Use forever for all your building projects.
Which Trades Are Supported?
BauTagebuch includes predefined trades like Structure, Engineering, and Finishing. You can also add custom trades as free text. The phase structure covers five phases — from start to completion.
What About Data Privacy?
All data stays only on your device. No cloud sync, no registration, and no data sharing. BauTagebuch sends no data to servers.
Can I Use Documentation in a Dispute?
BauTagebuch creates chronological documentation with photo and timestamp, sorted by trade and phase. Whether such documentation is sufficient in a specific dispute is decided by a court or expert.
In How Many Languages Is the App Available?
BauTagebuch is available in all 24 official EU languages — fully translated and usable. Suitable for international building projects with multilingual teams.