With the Smart 4 4000, a 2 year/24 month warranty is included as standard from the time you buy the brush. It is a little harsher/aggressive feeling than a Sonicare or Colgate brush. Whilst this is not exactly the best way of rating a clean of the teeth, it really feels like it has done something. The Oral-B Pro 2 2000 has 2 cleaning modes, the Pro 3 3000 has 3 cleaning modes, the Smart 5 5000 has 5 cleaning modes, so as you would imagine the Smart 4 has 3 cleaning modes….Yes, I know, I can’t quite figure that out either. Official Oral-B brush heads are recommended and they all have something known as indicator bristles. These are Blue coloured bristles that will over a 3 month period gradually discolour. If you did not already know, this is generally the recommended brushing time. 2 minutes, twice a day.

Aside from the aforementioned 2 brush heads, the Smart 4 comes with a brush head stand included in the box. This is a moulded piece of plastic that clips around the charging stand that is also provided.It takes a bit of practice to get in a routine of having your phone with you when brushing. If you forget it or don’t have it to hand, don’t worry. The handle will store the data for the last 20 cleans and sync this to the app, the next time it connects.

Ideally, a way of selecting the mode prior to actually turning the brush on would be the solution. This is not available, not even on the premium Genius 9000 model.This price does exclude the cost of water, toothpaste and electric to charge it. This price also works on some assumptions, but you get a rough idea.

One of the benefits with the Smart 4 is that you do get 2 of the same brush heads included, so if you like that style of brush head you do save yourself a little on the cost.I understand why though. If it did, there is no way of showing what mode it is on, unless you use the app.