DON'T TEMPT FATE! KNOW YOUR WEIGHT!

WYR Field App

Installable PWA v0.14.2

Saved Weighs0
Customers0
App ModeOffline-ready
Install Weigh Your Rig

Install WYR on this device for a home-screen icon and standalone app experience.

Installation becomes available when the app is opened from its secure HTTPS address.
Local Data & Backup

Jobs and photos are stored in the WYR offline database on this device.

Opening local database…
Prototype scope

Customer → vehicle → caravan → WDH selection → wheel weights → TBM → validation → results → save job.

Open Saved jobs to export a completed weigh as a .wyr.json file.

Customer Details

Create the weigh record.

Vehicle Details

Manufacturer limits and vehicle identification.

Vehicle Accessories & Load

Vehicle Tyre Pressure Advice

Caravan Details

The wheel-entry screen adapts automatically to axle configuration.

Caravan Plate / Payload

Tare—
ATM limit—
Nominal payload—
Nominal payload = ATM limit − Tare. This is calculated automatically from the compliance-plate figures entered above.

Water Tank Levels

Caravan / Trailer Accessories & Load

Optional Towball Height Check

Only complete when relevant to the assessment.

Caravan / Trailer Tyre Load & Pressure

Enter the tyre sidewall/rating information once. The app compares it with the actual measured wheel loads.

Use the tyre manufacturer's stated load and cold-pressure rating. Production recommendations should be checked against the tyre manufacturer's load/inflation data.

Photos & Evidence

Capture the customer's actual rig for the job record and personalised report.

Complete Rig — Side Profile

Recommended report photo

Photograph the complete tow vehicle and caravan side-on. Keep the full vehicle, hitch, drawbar, wheels and caravan body in frame.

Stand square to the rig where practical and leave clear space around the complete combination.

No side-profile photo captured.

The image is reduced in size and stored with the saved weigh. It can be used as the customer's actual vehicle/caravan image on the WYR explanation page.

Other Evidence Photos

Compliance plate, tyre, hitch, breakaway, DNOTV and issue-specific photos can be added as the evidence system expands.

Weigh Configuration

Select whether a Weight Distribution Hitch is fitted.

Vehicle Wheel Weights

Individual wheel readings. Totals calculate automatically.

Vehicle unhitched

Front axle0 kg
Rear axle0 kg
Vehicle total0 kg
L/R balance—

Hitched — WDH disengaged

Front axle0 kg
Rear axle0 kg
Vehicle total0 kg
L/R balance—

Caravan Wheel Weights

One adaptive screen: 2 or 4 individual wheel readings.

Single axle — 2 wheels Change configuration on Caravan Details
Left side0 kg
Right side0 kg
GTM measured0 kg
L/R balance—

Tyre Load & Pressure Check

Heaviest tyre load0 kg
Tyre load utilisation—
Provisional pressure estimate—
Max cold pressure—
Tyre manufacture date—
Approx tyre age—
Enter tyre max load and max cold PSI to calculate a provisional load-based pressure estimate.

Tow Ball Mass

TBM is calculated automatically from the vehicle weight change.

Vehicle unhitched0 kg
Vehicle hitched — WDH disengaged0 kg
Calculated TBM0 kg
TBM % of actual ATM—
Vehicle max TBM—
Caravan max TBM—
Applicable max TBM—
Capacity remaining—
TBM calculation: hitched vehicle total (WDH disengaged) − unhitched vehicle total.
Compliance: TBM is checked once against the lower of the vehicle and caravan TBM limits.
Loading guidance: TBM % is calculated against the actual ATM.

Adjusted / Final TBM — Optional

Use only if loading is changed during the assessment and a new final TBM is established. Leave blank to use the automatic hitched-vs-unhitched TBM.

Measured GTM0 kg
Calculated ATM0 kg
ATM limit0 kg
TBM sourceAutomatic

Assessment Observations

Record the practical checks and advice used in the WYR findings section.

Validation & Results

Measured values are reconciled before the job can be saved.