Emissions
Estimated impact linked to logged activities.
Research
Carbon clarity starts with honest boundaries.
Green Compass separates directional product estimates from independent research findings and explains what each signal can and cannot tell you.
Green Compass methodology
Four signals, kept deliberately separate.
Product figures are directional estimates. They are not measurements or guarantees. The methodology is versioned so changes can be explained over time.
Avoided impact
Estimated impact avoided through lower-impact choices.
Confirmed offsets
Offsets included only after provider confirmation.
Remaining balance
What remains after the separate signals are presented.
Independent evidence
Repeated feedback, tested over time.
216
participants
4
consumption domains
Several
survey rounds
Reported results
A meaningful signal, with important boundaries.
The researchers reported a 23% average decrease in carbon emissions. Effects varied by consumption area, from 12% in mobility to 35% in household activities.
Overall
Average across the study
23%
Mobility
Lowest reported domain result
12%
Household
Highest reported domain result
35%
Scale shown to 40% for visual comparison. Values are reported by Hoffmann, Lasarov, Reimers, and Trabandt (2024), not measured outcomes from Green Compass users.
| Result | Decrease | Context |
|---|---|---|
| Overall | 23% | Average across the study |
| Mobility | 12% | Lowest reported domain result |
| Household | 35% | Highest reported domain result |
Four domains
Where daily consumption takes shape.
Mobility
Travel choices such as private cars, public transport, cycling, and shared journeys.
Food
Diet, sourcing, and food-waste decisions that can add up over time.
Heating
Home energy use, insulation, temperature settings, and heating systems.
Household
Electricity, devices, purchases, and other everyday consumption patterns.
Read this carefully
What the numbers mean and what they do not.
The study tested a purpose-built research app with 216 participants. Its results should not be treated as a universal forecast for every app, person, or timeframe.
Effects differed by domain and individual characteristics. The paper reports that perceived green self-efficacy strengthened the effect, while a strong green self-identity reduced it.
For Green Compass, the responsible takeaway is that repeated, useful feedback is worth exploring. It does not mean that a specific reduction can be guaranteed.
Read the full publicationDiscuss the evidence
Questions, challenges, and useful criticism are welcome.
If you work in sustainability, research, or behavior change, we would value your perspective.
See how this informs the product