Detect mould 48 hours before it becomes visible

The Vex sensor monitors mould-specific chemical compounds 24/7. Tenants get plain-English daily reports. Landlords get a real-time portfolio dashboard with automated Awaab's Law compliance tracking.

48h
Early warning
24/7
Monitoring
£80
Per device
14d
Awaab compliance
Scroll to explore
Tenant App · Interactive

Your tenant always knows their air quality

A daily report that starts with one number and one sentence. No technical knowledge needed. ↓ Tap the tabs, the ? icon, and the buttons to explore the live prototype.

9:41
Good morning, James
Bedroom Report
Live
Tuesday, 1 April 2026
?
How your score is calculated
Mould chemical signal
34
30-day rising trend
18
Humidity conditions
16
Maximum 100. Above 60 triggers a Monitoring flag. Above 75 triggers Action Required.
Risk Score · Today
0
out of 100
30-day trend
+29%
above clean baseline
Possible Dormant Colony
Chemical markers elevated above a verified clean room. Humidity is currently safe. Active growth is unlikely today.
7-day trend rising at 10x the rate of a clean room. Inspect this week.
Environment
Updated every 20 min
Humidity
43%
Peak today 52%
Safe
Temperature
27°C
Avg today
Warm
Mould Markers
Proprietary sensor analysis
Chemical compound detection
10-band gas fingerprint
1-octen-3-ol
Primary mould marker · Aspergillus and Penicillium
+29%
3-octanone
Secondary marker · Chaetomium and Stachybotrys
+21%
Ethanol reference
Cooking and cleaning baseline
Normal
DMDS
Active growth indicator · Not elevated
Clear
Marker Trend
Clean period
Elevated
Baseline
Alert at 0.38
Actions
Based on your data
Inspect cold corners and window frames
Check behind furniture on external walls. Photograph anything visible.
This week
Ventilate 20 minutes morning and evening
Directly reduces the compounds the sensor detects. Cross-ventilation works best.
Daily
Report to landlord if signal rises further
Download as timestamped evidence. Awaab's Law requires a 14-day response.
If worsens
9:41
Vex Alerts
Notifications
3 new
Today
1 April 2026
Critical
Signal crossed alert threshold
Your bedroom mould marker has risen to 0.43, passing the monitoring threshold of 0.38. This is the 7th consecutive day of increase.
09:20 · Bedroom sensor
Monitoring
Overnight humidity elevated
Humidity peaked at 62% between 02:00 and 05:00. Still below the 80% growth threshold, but higher than your usual overnight range.
06:15 · Bedroom sensor
Weekly summary ready
Your 7-day air quality report is ready. Signal is trending upward. Review your actions for this week.
Monday · Weekly summary
9:41
Awaab's Law
Your Rights
Protected
Compliance Tracker
Based on your current signal
1
Monitoring threshold crossed
Vex automatically logged the date your signal exceeded the monitoring threshold.
25 March 2026
2
Timestamped report generated
A PDF report with 30 days of sensor data was automatically created as evidence.
25 March 2026 · Automatic
3
Notify your landlord
Send the report to your landlord to start the 14-day Awaab's Law response window.
Action needed today
4
Landlord investigates
Your landlord must respond and begin investigation within 14 days of notification.
Deadline: 15 April 2026
5
Repairs completed
If mould is confirmed, repairs must begin within a further 7 days.
Deadline: 22 April 2026
Awaab's Law Explained
Awaab's Law 2025
October 2025 — Now in force
Your landlord must investigate within 14 days of being notified about damp or mould, and begin repairs within a further 7 days if a hazard is confirmed. Vex provides objective, time-stamped evidence to support your case.
One number, one sentence
The risk score is the only number a tenant needs to understand. Green is safe. Amber means watch. Red means act. No chemistry knowledge required.
Push notifications at the right time
Tenants are only alerted when the signal crosses a meaningful threshold — not every reading. Signal-to-noise ratio is everything.
Automated compliance workflow
The Rights tab tracks every step of the Awaab's Law process. One tap generates a timestamped PDF ready to send to the landlord.
Score explained transparently
Tap the ? on the score to see exactly how it is calculated: chemical signal, 30-day trend, and humidity conditions. Nothing is a black box.
Landlord Portal

50 properties. One screen. Zero surprises.

Real-time risk scores across the entire portfolio. Automatic Awaab's Law compliance tracking. Click any flat to see its full sensor history.

app.vexmonitor.co.uk/portfolio
AP
A. Patel
Portfolio Manager
Portfolio Overview
Thursday, 1 April 2026 · Sheffield Council Housing
3 Require Action
Total
20
Flats monitored
Clean
12
No concerns
Monitoring
5
Elevated signal
Action Required
3
Inspect now
Awaab Deadline
1
3 days remaining
Awaab's Law deadline approaching. Flat 14, Park Hill Estate expires in 3 days. Inspection must be arranged and documented before the deadline.
View deadline
All (20)
Action (3)
Monitoring (5)
Clean (12)
Your portfolio · sorted by risk
Pricing

Simple, transparent pricing

One device per room, one subscription per property. No hidden fees.

Tenant
Free
Included with device
  • Daily air quality report
  • Push notification alerts
  • Awaab's Law compliance workflow
  • PDF evidence generation
Most popular
Landlord
49p/mo
per property + £80 per device
  • Portfolio monitoring dashboard
  • Awaab's Law compliance tracking
  • Automatic deadline alerts
  • Per-room device breakdown
  • Inspection booking workflow
  • Notice letter generation
Council / Housing Association
Custom
Volume pricing available
  • Everything in Landlord
  • API access for existing systems
  • Bulk deployment support
  • Dedicated account manager
  • Awaab audit trail export