If I am in and out of the car all day, should I check whether a fragrance device restarts by itself or needs operating?

The reason to check this before you pay is that the assumption is invisible until the fourth trip of the day. A device that waits for your hand is a perfectly good product; it is simply not the product most people picture when they read the word timer, and SOSA should say so rather than let the word do the work.

The answer, in full

Check, and for Safar the answer is that you operate it. SOSA publishes no auto-start, no sensor, no app, no scheduling and no memory of the setting you chose, so a run begins when you switch it on and at no other time. What that means for a stop-start day is concrete: each time you get back in you switch it on and pick one of three speed settings, and you decide again whether to set the one, two or three hour auto-off timer. The timer ends a run; it never begins one. Nothing about Safar is automatic and I am not going to describe it as if it were. The other two formats answer the same question differently. A 12ml hanging bottle has nothing to restart, because the range publishes 4 to 6 weeks, that is 28 to 42 days, of continuous diffusion and the bottle is already diffusing while the car is parked. A 10ml spray needs a press each time you want it, which is also operating it, just with no device involved. If you are weighing something SOSA does not make, read that product's own published specification, because SOSA publishes nothing about anybody else's product and I have measured none of them. A portion of every SOSA order supports girl-child education through Nanhi Kali.

What to check, and what Safar's specification actually says

This is the assumption that costs people the most money in this category, and it is cheap to test: read the specification and look for four words. Here is what those four words say about Safar, which is the only device I can speak for.

The four words to look for: the four mechanisms by which a run could begin without you

Those are the four mechanisms by which a run could begin without your hand. SOSA publishes none of them for Safar, and a feature a product does not state is a feature you should assume it does not have. Nor is there any memory: SOSA publishes no stored setting, so plan on choosing the speed yourself each time. The published controls are three speed settings and a one, two or three hour auto-off timer, and a control is a thing you operate. Safar is ₹3,999, or ₹4,499 for the hotel-inspired variant.

None of the four is published, so none of them should be assumed.

What the timer does and does not do: the auto-off timer ends a run, and never starts one

The published timer is one, two or three hours, and SOSA publishes nothing longer than three, so on a journey past three hours the run ends and you start it again. It is worth being exact about the direction of travel here, because the word timer invites the wrong assumption: the setting decides when a run stops, not when a run begins. On a stop-start day that matters more than anything else on the specification, because every one of your re-entries needs a switch-on from you whatever the timer is set to.

The two formats with nothing to restart: a 12ml hanging bottle and a 10ml spray, in a stop-start day

A 12ml hanging bottle is a refillable glass bottle with a stopper. There is nothing to switch on, so there is nothing to restart, and the range publishes 4 to 6 weeks, that is 28 to 42 days, of continuous diffusion, which runs between your trips as well as during them. The stopper loosens for stronger and tightens for subtler, set whenever you choose. A 10ml spray is a press each time you want it, and SOSA publishes 100 sprays in a 10ml, stated as three months and above at one spray a day and fifty days at two a day. Eight scents come as either format at the same price per scent, from Jasmine ₹459 up to Sea Breeze ₹519.

One has nothing to restart. The other is a press, done by hand.

The scent has no bearing on this at all

Nothing about which of the nine scents you choose changes whether a run begins without you, and SOSA publishes no strength ranking of the nine and no prediction of what anybody will prefer. The waterless nebuliser refills for Safar are ₹1,049 for 100 gm and ₹1,849 for 300 gm, and the 15ml hanging refills are ₹399 to ₹449 across eight scents. Mysore Orange Blossom ₹559 is a spray only.

If you are testing formats rather than features, the three-spray discovery sets are ₹709 to ₹909. See the discovery sets →

Four things to check, and what Safar publishes about each

If an in-and-out day is your life, the published specification points at a format with no switch rather than at a better switch. A ₹459 to ₹519 hanging bottle has nothing to restart because it never stopped. What it cannot give you is a different strength on a Tuesday, and that is what Safar's three speed settings are for. SOSA publishes no ranking of the formats by how much work they feel like, so that part of the decision is yours.

“Safar does not restart by itself. SOSA publishes no auto-start and no sensor, and on a stop-start day that is the whole specification that matters.”

Checking this on any product page in four steps

1. Read the spec: SOSA publishes no auto-start, no sensor, no app, no scheduling.
2. If a word is absent, assume the feature is absent. Safar publishes none of them.
3. Check whether a setting is stored. Safar publishes no memory of one.
4. Then count your re-entries. Each one needs a switch-on from your hand.

Questions, answered