EN
Presentation

ZenConstat : the accident report, complete and readable, from a phone

A free Android app that guides drivers step by step, at the scene of the accident, to a signed European accident statement, with a clear sketch and a PDF ready to send to the insurer.

Sketch drawn by the app from a driver's own account.
Sketch drawn by the app from a driver's own account.
21languages, for the app and the document
3ways to fill it in: 1 driver, 2 on one phone, 2 phones
OfflinePDF created on the phone, no connection needed
No accountno sign-up, data kept on the phone

What the app does

ZenConstat follows the structure of the European accident statement and breaks it into short steps. Nothing is left out: at every step, the app shows what is required and what is optional.

  1. The accidentDate, time, place (with "Locate me"), injuries, damage to anything other than the vehicles, witnesses.
  2. Policyholders, drivers, vehicles and insuranceReusable profiles: a regular driver enters their details once and finds them again for the next report. Trailers included.
  3. The circumstancesThe boxes of the statement, the points of impact on the vehicle outline, the description and photos of the damage.
  4. The sketchThree ways to make it: with the tool (roads, vehicles, arrows, signs, markings), freehand, or by photographing a paper sketch.
  5. Remarks and signaturesEach driver reads it through, adds their remarks and signs on the screen. The PDF is created, protected against changes, then shared by email or messaging.
One driver

Alone on their phone

The driver fills in their part; the other driver fills in theirs on paper or on their own side.

Two drivers

One shared phone

Both drivers fill in the same report, one after the other, and each signs on the screen.

Two phones

Each on their own

The phones pair with a code. Each driver fills in their part, the server joins them into one document, then deletes them within the hour.

Assisted mode

ZenAssistant : the report filled in through conversation

After an accident, many drivers are shaken and struggle to fill in a form. ZenAssistant asks them the questions one by one, in their own language, and fills in the report from their answers.

Speak instead of typing

The driver can dictate their answers. They tell the story in their own words; the assistant works out the circumstance boxes and the sketch.

Photograph instead of copying

Insurance certificate, registration document, driving licence: one photo is enough, the assistant reads the document and fills in the matching fields.

No question forgotten

The assistant follows the order of the report. The server checks every answer: if a required question (the place, for example) is skipped, the answer is redone before it is shown.

The driver stays in control

Each section is shown for checking before it is saved, and the sketch is approved or corrected by the driver. Nothing is signed without being read.

The assistant can make mistakes, just like a badly filled-in form. That is why the app never lets it decide on its own: the information only counts once the drivers have read it and signed, as on a paper report.

Gallery

These sketches were drawn by the app; almost all of them come from our tests, from nothing but the drivers' accounts, in different languages and countries. Roads, lanes, the side of the road traffic keeps to, signs and street names come from the description and the place of the accident; each arrow shows the vehicle's path and ends in the middle of the lane it was heading for.

Crossroads with a STOP sign
Crossroads with a STOP signA vehicle goes through the STOP and hits the side of a vehicle crossing the junction.
T-junction, give way
T-junction, give wayA vehicle comes out of the side road, where it must give way, and turns left in front of the vehicle on the main road.
Reversing into a parking space
Reversing into a parking spaceA vehicle reverses from the next lane towards the space, its arrow pointing at the spot, and touches the parked vehicle.
Car park
Car parkA vehicle reverses out of its space and hits the side of a vehicle driving along the aisle.
Angled parking
Angled parkingA vehicle pulls into an angled space and clips the vehicle parked right next to it.
U-turn
U-turnA vehicle makes a U-turn on the road and cuts across the path of the vehicle coming in the other lane.
Single-lane roundabout
Single-lane roundaboutA vehicle enters the roundabout without giving way and hits the side of a vehicle already going round.
Two-lane roundabout
Two-lane roundaboutA vehicle exits from the inner lane and cuts across the path of the one in the outer lane.
Three-lane roundabout
Three-lane roundaboutA vehicle exits from the inner lane, cutting across the middle lane, where the other vehicle is.
Lane change on a motorway
Lane change on a motorwayA vehicle moves into the next lane and clips the vehicle driving in it.
Joining an expressway
Joining an expresswayA vehicle comes up the slip road, where it must give way, and hits the vehicle in the nearside lane.
Cyclist in a cycle lane
Cyclist in a cycle laneA car turns right at the junction and cuts across the cyclist going straight on in the cycle lane.
Y-junction
Y-junctionA vehicle comes from the branch and turns left onto the main road, into the path of the vehicle driving along it.
Staggered crossroads
Staggered crossroadsTwo side streets that don't face each other: a vehicle crosses from one to the other, cutting across the main road, and hits the vehicle driving along it.
Bend, two-wheeler
Bend, two-wheelerA motorbike and a car meet in a bend; each vehicle is placed along the curve, in its own lane.

If the sketch isn't right, the driver describes it differently to the assistant or corrects it themselves with the sketch tool.

Example

A real accident report, produced by the app

This is the document both drivers receive: the official accident statement, filled in and signed, with the sketch in its place. The people, vehicles and insurers are fictional. Zoom in to read every box.

Download the PDF
100 % PDF
Accident statement filled in by ZenConstat for an accident between two drivers at a crossroads with a STOP sign

What you gain

  • Complete reports. Required fields are checked before signing: fewer incomplete reports, fewer follow-ups.
  • Readable documents. A typed PDF, no handwriting to decipher, on the European accident statement form.
  • Consistent sketches. Lanes, traffic direction, paths and point of impact drawn cleanly, consistent with the ticked boxes.
  • Accidents between drivers who speak different languages. Each driver uses the app in their own language; the document is produced in the chosen language.
  • A locked document. Once created, the PDF is protected against changes.
  • Faster claims. The driver can send the PDF to their insurer from the scene of the accident.

Personal data

The app was designed to keep as little data as possible. Privacy policy

On the phone

No account. Profiles and the report in progress stay in the app's private storage. The report in progress is deleted as soon as the PDF is ready.

Two-phone mode

Encrypted exchanges, server hosted in the European Union. The parts of the report are kept in memory for 60 minutes at most, never in a database.

ZenAssistant

Optional. Messages and photos are processed by the AI model (Anthropic) without being used to train it; our server keeps none of them.

Statistics

Only the country of the accident, the mode and the time are recorded, anonymously, to know where the app is used.