Stay Sharp, Stay Focused.

We are a Seattle-based start-up owned by Mitsui Corporation, one of the largest companies in Japan.

We are a new company whose mission is to advance the way the world views, understands, and improves its cognitive health.

1. Visit the Thinkie sensor product page and select your preferred sensor color.
2. Checkout by clicking “Continue to Checkout” and select “Flex | Pay with HSA/FSA” at the bottom of the page as your payment option.
3. Complete your transaction by clicking “Pay Now” to be transferred to checkout.withflex.com, where you'll complete a brief eligibility form and enter your HSA/FSA card details.

• Tax savings: Contributions to your HSA/FSA are made with pre-tax dollars, reducing your taxable income
• Budget-friendly: Spread out healthcare costs over the year by using your HSA/FSA funds
• Health investment: Invest in products that help you maintain and improve your health

You can still purchase eligible products and submit your receipt for reimbursement.

A Letter of Medical Necessity (LMN) is a document from a healthcare provider explaining why a specific medical service or product is necessary.

Common reasons include incorrect card details or insufficient funds. Please verify your information and try again.

As a rough guideline, we recommend using Thinkie for:
- 5 to 10 minutes a day
- 3 days a week
- 30 days

The primary goal is to achieve the daily goal of 270 Thinkie points over the course of several days each week, and to continue that practice for at least 1 month.

Research from NeU (a sister company to Thinkie) suggests that higher training frequency correlates with improvement in brain age and a longer-term rejuvenation effect.

That's on purpose! Dr. Kawashima, world-renowned neuroscientist and developer of the Thinkie brain games, says "My research shows speed with accuracy is more effective than complexity. The games seem simple, but they are not. They are designed by neuroscientists who study what activities lead to more blood flow to the brain, and therefore work the brain more. Although it seems counterintuitive, simpler games are more effective for users of any age."

You don’t have to beat or win the games. In fact, your Thinkie score is unrelated to how well you performed during play. More important is that you just try your best, as this is how you “exercise” your brain. The harder you work and the more often you play, the greater the benefit.

Most users achieve meaningful gains with short, routine sessions guided by the app; generally, 15 mins/day, 3-4 times/week is sufficient. Clinicians can run supervised protocols for diagnostic or therapeutic use while consumers follow guided home programs.

According to research conducted by our partner NeU, there is evidence of brain age rejuvenation of an average 3.7 years among individuals who used Thinkie for 3 months.

Conduct the "Brain Age" assessment once a month to calculate your brain age based on scientific and historical data. We recommend a monthly cadence to measure brain age accurately, as the result may fluctuate and give an inaccurate reading if done too frequently.

Scientific studies have demonstrated a correlation between increased blood flow to the brain’s pre-frontal cortex, which occurs during increased brain activity. This increased blood flow due to activity is scientifically linked to improved cognition – this is how Thinkie helps rejuvenate your brain. Thinkie games have been designed to be challenging and enjoyable while increasing your brain activity.

Thinkie is not a medical device and is not meant to cure any particular condition. However, our research shows that dedicated use of Thinkie can improve your cognitive abilities and overall brain wellness.

Brain activity is measured by the changes in blood flow in your brain in comparison to the baseline established during the 15-second pre-game calibration. Thinkie points represent the highest score achieved during the game out of a 100-point maximum. A higher number indicates a greater and more significant change in blood flow volume.

Not at all! You don’t have to beat or win the games -- just try your best. The most important thing is to increase your brain activity while playing the games.

This usually results from one of two possible causes:

1. The Thinkie sensor measured too much brain activity during the calibration period (i.e., pre-game deep breathing). The brain activity score calculates the difference between the baseline pre-game measurement and increased brain activity occurring during games. For example, if the games are played consecutively, the brain may still be active (i.e., there may still be high blood flow) carried over from the initial attempt. This can lead to less measured improvement in the second attempt. You can minimize such lingering effect by calming down and taking deep breaths during the cool-down and baseline measurement intervals.
2. It's possible that brain activity did not actually increase during the second attempt. If your concentration wanes, or your brain becomes too tired, that may reflect on your scores. In other words, if you’re not fully concentrating during play, your score may reflect that your brain is in a less-active state. We advise simply calming your mind during the next pre-game measurement period and trying again.

It’s also worth mentioning that both of these factors may be occurring simultaneously to differing degrees. Per Dr. Kawashima, the creator of Thinkie’s brain games, actual brain activity is often different from what we perceive. We recommend you use Thinkie multiple times, playing different games each time, to better understand your brain’s tendencies and learn how to maximize your results.

The Thinkie sensor utilizes fNIRS technology, which uses near-infrared light irradiation to detect the presence of hemoglobin in the brain based on changes in light throughput measured through the skin. These changes indicate alterations in cerebral blood flow volume, which in turn reflect changes in neural activity. For detailed information, please see this article.

The fNIRS sensor is designed to measure blood flow in the prefrontal cortex in your brain, which is above your left eyebrow. This is the part of your brain that contributes to human executive function and cognitive capabilities such as memory and focus.

The Thinkie system does not collect any type of sensitive personal data; it only measures blood flow to the prefrontal cortex. Each user chooses a username for their account, and each account has a unique identifier. The account name and its unique identifier are used only to track your Thinkie sessions and scores and to personalize your experience.

Yes – orientation of the sensor does not matter, so long as it is not blocked by hair or anything else.

Not usually, because everyone is unique, but you can try placing the sensor on both sides to see if your Thinkie score changes. Left-handed people use the right brain more for manual tasks, and vice versa for right-handed people, but brain lateralization is more complex than this simple dichotomy would imply.