How do I compare continuous diffusion with a run I choose myself?

The honest shape of this comparison is not strength against strength. It is a bottle that diffuses through the twenty-three hours your car is empty against a device that diffuses for a run you were present to start. If those twenty-three hours matter to you, that is the whole comparison, and it is a judgement about your own routine rather than about either product.

The answer, in full

Put the two published descriptions side by side and then put your own week beside them. A 12ml hanging bottle is a refillable glass bottle with a stopper that loosens for stronger and tightens for subtler, and SOSA publishes 4 to 6 weeks, that is 28 to 42 days, of continuous diffusion. It is diffusing while you drive and it is diffusing while the car stands locked, because that is what continuous means. Safar is a 20ml bottle, three speed settings and an auto-off timer of one, two or three hours, and it diffuses for the run you start. What Safar asks of you is published: switch it on, choose one of three speeds, choose one, two or three hours of auto-off or none, charge it over Type-C, and refill the 20ml bottle. Which of those two matches your routine is not something SOSA publishes a ranking for, so the deciding figure is your own log of driving hours against parked hours. A portion of every SOSA order supports girl-child education through Nanhi Kali.

The three readings that make the comparison real

A comparison between a continuous format and a run you start is only worth making against numbers, and only one of the three numbers involved comes from a product page. The other two come from your week.

Your week: hours driving, hours parked, journey lengths

Seven days, written down at the time rather than remembered afterwards. Engine-on hours, parked hours, and how long each separate journey took door to door. This is the only part of the comparison nobody has done for you, and it is the part that decides it. A person who drives forty minutes a day and parks for twenty-three hours is reading these two formats very differently from a person who drives five hours a day.

Written at the time. Memory rounds journeys up.

Continuous: what the 12ml hanging bottle is published as

A refillable glass bottle whose stopper loosens for stronger and tightens for subtler, published as 4 to 6 weeks, that is 28 to 42 days, of continuous diffusion. Continuous is the operative word: the bottle is open to the cabin air whether you are in the seat or at your desk. Eight scents carry a 15ml refill at Rs 399 to Rs 449. Mysore Orange Blossom is a spray only: no 15ml bottle is published for it. Jasmine hanging is Rs 459.

A run you start: what Safar is published as

A 20ml bottle, a 2000 mAh battery over Type-C with the cable in the box, three speed settings, an auto-off timer of one, two or three hours, 6.9 cm across. Waterless cold diffusion of pure fragrance oil: no water and no heat, and it scents the air rather than humidifying it. Up to ten hours continuous or thirty hours intermittent per charge. The ten and thirty hour figures describe the 2000 mAh battery per charge, not how long the oil lasts. What Safar asks of you is published: switch it on, choose one of three speeds, choose one, two or three hours of auto-off or none, charge it over Type-C, and refill the 20ml bottle.

Five published actions, and four of them recur.

Choosing the scent before you choose the format

SOSA publishes no strength ranking of the nine car scents, so there is no scent here that suits one format and not the other. Eight of the nine come as a 10ml spray or a 12ml hanging at the same price per scent: Jasmine Rs 459, Lavender and Sandalwood Rs 499, Sandalwood Rs 509, Icy Mint Rs 499, Lemon Rs 509, Oud Rs 519, Vetiver Rs 519, Sea Breeze Rs 519. Mysore Orange Blossom is Rs 559 and is a spray only.

Want to settle the scent before you settle the format? The three-spray discovery sets run ₹709 to ₹909 and let you smell a trio in your own car. See the discovery sets →

What each format publishes, side by side

If your log says you drive two short legs a day and park for the rest of it, you are choosing between a bottle that works through the parked hours and a device that does not. If your log says you drive for hours at a stretch, the three speeds and the auto-off are controls you would actually reach for. Both of those are readings of your own data, and that is the point.

“One format diffuses while the car is empty. The other diffuses while you are in it. Your week decides which of those you are buying.”

Comparing the two against your own routine, in four moves

1. Log your driving hours and your parked hours for one ordinary week.
2. Write down what each format asks of you, with the adjectives left out.
3. Price the two: Jasmine hanging Rs 459 against Safar Rs 3,999.
4. Decide on your own log. SOSA publishes no ranking of the formats.

Questions, answered