I tried Cerebrum’s assessment from the U.S., and it was both fun and informative. The 30 questions were challenging but engaging, and the results gave me real insight into my strengths. The personali... See more
Company replied
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Update - after posting this review, Cerebrum got in touch with me and located the account that was charged. They refunded all of the unauthorized charges with an apology. I have no idea how I got... See more
Company replied
This company use deceptive billing practices. I paid €0.99 for what I understood to be a one-time test. Shortly after, €14.99 started being deducted from my account every week!!! I did not author... See more
Company replied
I have decided to leave my initial review up, as I think it important for others to see my initial issue, their response on here, and then my final experience. So, after messaging Cerebrum, I was mes... See more
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Company details
Written by the company
Discover your intelligence score through Cerebrum's comprehensive assessment. Our 30-question test provides detailed insights into your cognitive abilities, complete with a personalized certificate. Join over 500,000 users who have uncovered their intellectual potential with our engaging test.
Contact info
United States
- cerebrumiq.com
Uncover Your Intelligence Score Now!
4.3
Excellent
46K reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 100% of negative reviews
Typically replies within 24 hours
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Following my negative review
Following my negative review, I was contacted via a Trustpilot reply by this company stating that they had requested my details through Trustpilot to identify me in their system and would process a refund within a few hours.
This has proven to be completely false and appears to be a tactic to deflect responsibility and give the impression that they are resolving the issue. In reality, it is simply delaying the process in the hope that customers will give up.
At their request, I have provided every piece of information asked for, including: Bank account and card details used for the transactions, Confirmation of all email addresses I have ever used, Exact dates and amounts of payments taken, Screenshots of all relevant transactions
Despite this, they continue to claim they cannot locate my details in their system.
Furthermore, upon checking my account today, they have made another attempt to take funds, which was fortunately blocked. This raises serious concerns.
Based on this experience, and the numerous similar reviews from other customers, this behaviour appears to be fraudulent. This company should be investigated as a matter of urgency.
March 23, 2026
Unprompted review
Reply from Cerebrum
Dear Julian Iddon, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number JULIANIDDON749601 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
This company is a scam/Stop future charges
This complaint is about the free trial subscription my college student son signed up for.
The email used was .
We canceled the service in May 2025, but we've been charged $9.99 weekly since then.
We request:
- Immediate cessation of charges
- Full refund for all unauthorized payments from May 2025 to present
Please address this matter urgently.
Warning: Scam Alert
This company is a scam. Their 'free trial' is a trap. Once you provide your PayPal or payment info, you're vulnerable to unauthorized charges. Even if you cancel, they'll continue charging you with no way to stop it. Avoid this company at all costs.
March 21, 2026
Unprompted review
Reply from Cerebrum
Dear Komi Klu, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number KOMIKLU509693 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
I liked Cerebrum more than I expected
I liked Cerebrum more than I expected. I love that it made me focus on small details instead of clicking through on autopilot. It was a nice mental workout and gave me something to think about after. But it was too short and quick. I want more!
March 18, 2026
Unprompted review
Reply from Cerebrum
Dear Gian, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
They can basically get to test there skills here
I got to test my skills and got the results
August 24, 2025
Reply from Cerebrum
Dear hilary, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Nothing was wrong,the company should…
Nothing was wrong,the company should just make the certificates downloadable.
August 11, 2025
Reply from Cerebrum
Dear oyoo victor, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number OYOOVICTOR836468 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Scam site
Scam site. I just discovered the have taken 349,65 euros from my account although I do not approved that action. Stay away from it. They tell you to do an iq test and then they take your money (9,99 euros every week).
March 16, 2025
Unprompted review
Reply from Cerebrum
Dear ilias vic, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number ILIASVIC332394 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Reply from Cerebrum
Dear Erika Lazcano Loayza, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Reply from Cerebrum
Dear Zonia Araque, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Reply from Cerebrum
Dear Marina Salcedo, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Porque me concentre y puse atencion
March 14, 2026
Reply from Cerebrum
Dear lucia, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Reply from Cerebrum
Dear alaeddine, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
I have been scammed out of £ 209.93 by…
I have been scammed out of £ 209.93 by myIQ.com , they have been taking £29.99 every month since September 2025 out of my bank account ( they are a deceptive organisation making out that to see your test results for just 50p x 2. They were no help at all and didn’t give me back any amount.
If I could, I would give them 0 stars , but there is no option for that. Other users have also had the same experience(seen on Reddit and other forums)with some instances where they charge after you cancelled the subscription
PLEASE, PLEASE, PLEASE stay away from this company.
UPDATE: scammers and liars
They have no intention of refunding me!! As you can see in their reply to my review, they said they will give me a full refund which is completely false and it was just for them to look good online. I gave them all the details they asked for to process the refund and they proceeded to say they are having trouble finding my account even though the day prior, they found my account linked to the subscription. They then proceeded to send the same email over and over and brushing over what I said in the email. I even gave them screenshot evidence of the billings. I think it’s impossible to stoop lower than this company and they have the most shady, dodgy practices. Please avoid this site at all costs.
March 12, 2026
Unprompted review
Reply from Cerebrum
Dear Dominic Cashin, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number DOMINICCASHIN394834 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
This company is a scam
This company is a scam! They charge 0.99 pence, then suddenly I find they have taken 3 x £29.99 from my bank account! I looked at cancel subscription to find out they charge to cancel it aswell! I have contacted my bank to report fraud.
March 13, 2026
Unprompted review
Reply from Cerebrum
Dear Wendy Simkin, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number WENDYSIMKIN910641 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Avoid. Very obtuse practices
Echoing the comments of others. This is a site that hooks in people via unwittingly signing up for a subscription. This happened with my partner and they’ve taken a number of payments since which we’re trying to claw back.
Avoid this company as an individual.
Just by way of an update, this company appear to be refusing to process the refund they claim to be offering in their response. Thankfully I’m able to edit this post to provide a further update.
March 2, 2026
Unprompted review
Reply from Cerebrum
Dear Christopher Reilly, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number CHRISTOPHERREILLY770598 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Buenísimo y recreativa
March 11, 2026
Reply from Cerebrum
Dear LILIANNY, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
I took an iq test in may last year and…
I took an iq test in may last year and have just discovered they have took a total of £430 out of my account which I did not approve
Just a note to say they promised my refund but never sent it, so full of shit
March 10, 2026
Unprompted review
Reply from Cerebrum
Dear Mr Thomas Harrison, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number MRTHOMASHARRISON906115 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Reply from Cerebrum
Dear Yajaira Angarita buena, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Scam charge me 50p to do a test and…
Scam charge me 50p to do a test and have now taken over £200 out my account do not use this scam site.
March 10, 2026
Unprompted review
Reply from Cerebrum
Dear William, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number WILLIAM729180 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Reply from Cerebrum
Dear carlos, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Daylight robbery
They are scammers paid them 99 cent for IQ test they keep charging me 29.99 for what don't use there platform..now they want to charge me to unsubscribe to something I didn't subscribe to..I shall be going to my solicitor I tried to ring them no answer and no stars
March 4, 2026
Unprompted review
Reply from Cerebrum
Dear maedhbh armishaw, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number MAEDHBHARMISHAW144590 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
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