Table 1.
Search terms used and results generated within Google Play store and Apple App Store to identify diet and transport-related apps (each search statement represents a separate search).
| Search term | Results App Store | Results Google Play | Downloaded |
| Carbon footprint | 71 | 233 | 16 |
| Carbon calculator | 39 | 16 | 2 |
| Carbon AND food | 3 | 124 | 1 |
| Carbon AND diet | 0 | 44 | 0 |
| Environment AND food | 0 | 250 | 0 |
| Environment AND diet | 1 | 250 | 1 |
| GHGa AND food | 0 | 9 | 0 |
| GHG AND diet | 0 | 11 | 0 |
| GHG calculator | 0 | 9 | 0 |
| CO2b AND food | 0 | 42 | 2 |
| CO2 AND diet | 0 | 11 | 0 |
| CO2 calculator | 36 | 114 | 1 |
| CO2 emissions AND diet | 0 | 4 | 0 |
| Emissions food | 1 | 148 | 1 |
| Emissions diet | 0 | 27 | 0 |
| Greenhouse gas AND food | 0 | 33 | 0 |
| Greenhouse gas AND diet | 0 | 65 | 0 |
| CO2 tracker | 12 | 109 | 0 |
| Emissions calculator | 17 | 250 | 1 |
| Greenhouse gas calculator | 1 | 25 | 0 |
| Travel carbon emissions | 8 | 86 | 7 |
| Transport carbon emissions | 0 | 132 | 2 |
| Travel carbon footprint | 7 | 62 | 2 |
| Transport carbon footprint | 0 | 74 | 1 |
| Greenhouse gas emissions AND travel | 0 | 53 | 0 |
| Greenhouse gas emissions AND transport | 0 | 66 | 1 |
| GHG travel | 0 | 21 | 0 |
| GHG transport | 0 | 28 | 0 |
| CO2 emissions travel | 13 | 72 | 4 |
| CO2 emissions transport | 1 | 112 | 1 |
| Travel CO2 | 100 | 74 | 4 |
| Transport CO2 | 100 | 121 | 0 |
| Carbon AND travel | 3 | 126 | 1 |
| Carbon AND transport | 0 | 138 | 0 |
| Active transport CO2 | 0 | 5 | 0 |
| Sustainable transport | 4 | 202 | 5 |
| Sustainable transport CO2 | 0 | 12 | 0 |
| Sustainable travel | 27 | 250 | 0 |
| Sustainable mobility | 3 | 118 | 0 |
| Transport type | 100 | 249 | 0 |
| Transport type AND carbon emissions | 0 | 25 | 0 |
| Transport type AND carbon footprint | 0 | 14 | 0 |
| Transport diary | 3 | 128 | 1 |
| Active transport | 2 | 250 | 2 |
| Active transport AND CO2 | 0 | 6 | 0 |
| Green transport | 43 | 20 | 0 |
| Commute CO2 | 1 | 17 | 0 |
| Commute carbon emissions | 1 | 19 | 0 |
aGHG: greenhouse gas
bCO2: carbon dioxide