# OpenFahrtenbuch: Mileage Log — Trips via GPS or OBD adapter

> Trips via GPS or OBD adapter (iPhone/iPad app by Codext GmbH.)

- Source: https://appshunter.io/ios/app/openfahrtenbuch-mileage-log/id6820417114 (this page in markdown: same URL + `.md`)
- Developer: [Codext GmbH](https://appshunter.io/developer/1488755999)
- Category: Business, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 16.4 · 42 MB
- Languages: American English, German (Germany)
- Released: 2026-10-08
- Data updated: 2026-10-11

## What is OpenFahrtenbuch?

The free mileage log for freelancers, company car drivers and everyone who wants to get rid of the 1% rule in Germany. No subscription, no plug, no account. Open source.

THREE WAYS TO RECORD
• GPS in your phone: tap "Start trip" and the phone measures the distance, even when you leave the app. Start and destination addresses are filled in automatically.
• OBD adapter (optional): a low-cost Bluetooth LE adapter (ELM327) reads the real odometer from the car and starts and stops trips on its own.
• By hand: enter odometer, destination and purpose yourself, like a paper logbook.

BUILT TO THE GERMAN TAX OFFICE REQUIREMENTS
• Date, time and odometer at the start and end of every trip
• Business trips with destination, purpose, business contact and route for detours
• Private trips and commutes with kilometres and a note
• Reminders for the 7-day rule, late entries are marked
• Trips lock after 7 days and can never be deleted, only voided
• Every change is recorded in a tamper-evident SHA-256 hash chain and printed in the PDF next to the trip, with date and original value
• Odometer gaps are shown right away

EXPORT
• PDF mileage log for the tax office and your accountant
• CSV for Excel, DATEV and machine evaluation
• Full backup including the change history, verified before it can be restored

HANDY
• Places like home, office and clients fill in destination, purpose and contact automatically
• Multiple vehicles and drivers
• Cost log and 1% rule vs logbook method comparison
• Light and dark mode, German and English

PRIVACY
No account, no server, no ads, no tracking. All data stays on your phone. Location is only used while a trip is recording.

Note: the German tax office does not certify any logbook software. Whether a logbook is accepted depends on your entries. This app is not tax advice.

Source code: github.com/codextde/openfahrtenbuch
Made by Codext GmbH.

## Is OpenFahrtenbuch safe?

Not enough ratings yet to assess OpenFahrtenbuch.

## Is OpenFahrtenbuch legit?

OpenFahrtenbuch: Mileage Log appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for OpenFahrtenbuch is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-10-08

No release notes.

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All apps by Codext GmbH: https://appshunter.io/developer/1488755999

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-11.*