Comparison Yako O1 vs Yako K1

The number of brush modes provided by the device. The presence of several modes allows using the device for different procedures (for example, daily cleaning, delicate cleaning, whitening, etc.). Each such program has its own features of the working nozzle, as well as its own timer settings. The downside of such multifunctionality is the increased cost. In any case, this feature significantly expands the capabilities of the device; however, the specific set of modes may be different - it would not hurt to clarify it separately.

In this case, the mode means the general format of operation. For more information on the different formats, see "Modes" below. Note that this parameter should not be confused with the number of power settings. The latter is specified separately - see "Power modes", and in general, these characteristics are practically independent of each other. For example, a brush with one mode of operation can have several power settings. And vice versa, there may be only one power level, but several formats of operation.

Operating modes supported by the device.

Nowadays, toothbrushes offer the greatest variety of modes. In addition to traditional (so-called '2D') daily cleaning, they may include a 3D-mode, programs for sensitive and deep cleaning, polishing, whitening, gum massage, and tongue cleaning.

— Daily Cleaning (2D). The operating mode most similar to traditional (manual) toothbrushes. In this mode, the bristles move in a single plane; the trajectory can vary depending on the cleaning technology (see below). The intensity is usually medium/high, making this mode primarily for relatively healthy and not too sensitive teeth. The recommended time for daily cleaning is 2 minutes, 30 seconds for each quadrant of the mouth; relevant settings are typically provided in the timer (if available — see below). Generally, 2D cleaning is somewhat less effective than 3D (see below), but even the cheapest toothbrushes can offer this feature.

— Daily Cleaning (3D). A feature found in brushes with oscillating-rotating and sweeping technology. In these models, in addition to the primary cleaning technology, there is an up-and-down pulsation of bristles (more precisely, into the head and back). This allows cleaning in three planes, consid...erably improving efficiency compared to the 2D cleaning described above: the bristles not only process the outer tooth surface but also somewhat reach the sides and interdental spaces (although it is not a full replacement for using dental floss). The traditional downside of this feature is the relatively high cost.

— Sensitive Cleaning. A program for gentle treatment, mainly used for sensitive teeth and gums prone to bleeding. In brushes with oscillating-rotating and sweeping cleaning technology (see below), the sensitive mode usually involves reduced rotation/oscillation speed of the nozzle; in sonic and ultrasonic models, gentle treatment may be provided by decreasing the amplitude of oscillations. In any case, this mode minimizes discomfort during cleaning and the risk of gum damage — even with standard nozzles; for the most gentle effect, use this function with a sensitive teeth nozzle.

— Deep Cleaning. This name commonly refers to a cleaning with standard intensity, but extended duration — for instance, 3 minutes instead of the usual 2 minutes (45 seconds per quadrant of the mouth instead of the traditional 30 seconds). This mode allows for maximum effective tooth cleaning and removal of deposits insufficiently cleared by regular daily cleaning.

— Polishing. A mode for treating relatively clean teeth that do not require a full cleaning session. Usually, polishing is performed at a reduced frequency of oscillations (rotations) and takes significantly less time than regular treatment (e.g., 1 minute instead of the traditional 2 minutes).

— Whitening. A special mode for lightening tooth enamel and removing various stains, especially from the front teeth. It may be an extended version of the usual cleaning mode: for example, when whitening is enabled, the brush operates in a regular format for 2 minutes, then at increased intensity for 30 seconds. It's worth checking these specifics separately; also check contraindications for using this mode (especially for sensitive teeth and/or gum issues).

— Gum Massage. Gum treatment may be provided as a completely separate program or as an addition to the normal cleaning mode. This feature not only ensures effective cleaning but also strengthens the gums — useful for treating inflammation and bleeding, though it's best to consult with a doctor beforehand in such cases.

— Tongue Cleaning. A separate mode for cleaning the tongue. For many people, cleaning the tongue with an electric toothbrush causes a tickling sensation that's hard to endure for a long time. Therefore, this mode typically involves a brief duration of continuous treatment — around 20 seconds; several such 'sessions' can be made if necessary. It's also worth noting that having a tongue cleaning mode does not automatically mean a special attachment for such cleaning is included (see 'Attachments'), although such a tool is usually part of the set.

Note that in some toothbrushes, changing modes is done using 'smart' attachments: when such an attachment is installed, the device recognizes it via a built-in chip and automatically switches to the appropriate program.

The ability to charge the battery in the device from a standard USB port.

Refer to the "Type of power" section for battery details. Charging via USB offers several advantages over traditional mains charging. The primary benefit is the widespread availability of USB ports in computers, laptops, tablets, and various electronic devices. USB connectors are standard outputs in portable power banks, and USB adapters can convert 230V socket and car cigarette lighter socket outputs. This power source allows you to charge your toothbrush or irrigator not only from mains power but also from various other sources, even when sockets are unavailable, such as from a laptop or a power bank. This is particularly convenient during travel.

Another notable aspect of this charging method is that it often eliminates the need for a dedicated charger. All you need is a basic cable to connect the toothbrush or irrigator to a USB port. Typically, such a cable is included with the device, and the device itself features a standard microUSB port for power connection. This flexibility allows you to use alternative cables if needed, which are compatible with the plug type, making it more convenient and adaptable.

However, it's important to mention that these standard sockets on the device are not well-suited for use with charging stands, as discussed in the "Additionally in the kit" section. Consequently, some toothbrushes and irrigators...that use USB charging may not include charging stands at all, while others employ a unique design. In these cases, a dedicated socket for the charging stand is integrated into the device, and USB charging becomes accessible when the device is placed within a travel case, which also serves as a transitional component.