Cerebrum (cerebrumiq.com) has a 1.7 out of 5 rating on OK.one, based on 200 user reviews collected here. It is listed under Education & Training and its reputation is poor. 79% of reviews are 1 star, a relatively high share; The business has replied to 100% of negative reviews. Last updated 2026-08-10.
I am unable to cancel this payment [its my mums account and she has cancer]
It is not possible to log in [they say the email account is not recognised
There is not contact address which provides any response
They are taking £9.99 a week
Its a pure scam.
Im a retired judge
Reply from Cerebrum2026-03-04
Dear MiriamBrosh, 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 MIRIAMBROSH631822 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Scammed me, with their child company my IQ charged around a dollar just to start a secret subscription that cost me $40 a week later without notifying me. 100% a scam website. Most other reviews are likely bots.
Wish I could get a refund
Reply from Cerebrum2026-03-03
Dear Tyler Blackburn, 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 TYLERBLACKBURN481303 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
조
조윤현 · 2 reviews · Experienced 2026-01-23 ·
★★★★★
Scammers, get me a refund.
I just saw the test results for 1,480 won on January 23rd. And then, I have never allowed other payments or subscriptions. But on January 30th and March 1st, about 44,000 won was automatically charged. You guys definitely didn't show me anything like a subscription agreement. Why do you live like that? Is it that hard to make money?
Reply from Cerebrum2026-03-02
Dear 조윤현, 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 549266 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
D
Daniel Oliver · 3 reviews · Experienced 2026-03-01 ·
★★★★★
charged $30 without clear consent and…
charged $30 without clear consent and want a refund.
Reply from Cerebrum2026-03-01
Dear Daniel Oliver, 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 DANIELOLIVER564126 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
A
Alex McCullough · 1 review · Experienced 2026-02-24 ·
★★★★★
I completed their test in February…
Update: Cerebrum has reached out to me and promised a full refund. All of the transactions added up over the past year that they took from my account without permission totals $764.49. I’m pleased that they responded so promptly, but it’s been more than one business day and there still isn’t a refund in my account. Let’s see if they keep their promise.
I completed their test in February 2025, payed a $.99 one time fee for the results, and I have just checked my online banking for my past year saying i’ve been charged $14.99 weekly for a subscription that I never signed up for and was not aware of. I put in my card info for the one time $.99 transaction and nothing else, there’s claims with evidence all over the internet of this company doing the same and using deceptive tactics in a order to charge people an obscene amount of money over long periods of time without the buyer being aware of the transactions. I’ve tried emailing their contact on their website only to get automated messages back. This is my final attempt of getting a refund for every weekly transaction for the past year aside from the initial $.99 transaction and making things right before I go through my bank to get a chargeback. I’ve already contacted them and they’re absolutely astounded by cerebrum iq’s deceptive tactics.
Reply from Cerebrum2026-02-26
Dear Alex McCullough, 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 ALEXMCCULLOUGH690309 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
S
Sarah · 6 reviews · Experienced 2026-02-26 ·
★★★★★
Unauthorised Payments
Recurring charges on my account - specifically GBP£9.99 removed five times in January.
From the briefest of searches, it seems access was obtained by clicking through on online tests. I'm quite observant and frequently halt this type of online payment but I guess this one got through but I'm interested to know how as I'm cagey about where I put my bank details.
I would appreciate this company please respond to discuss this matter in more detail - pretty sure you know where to find me
Reply from Cerebrum2026-02-26
Dear Sarah, 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 SARAH246644 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
F
FBI · 1 review · Experienced 2026-02-26 ·
★★★★★
The company commits fraud and is a scam.
Reply from Cerebrum2026-02-26
Dear FBI, 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 FBI896863 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
Recurring subscription charges following IQ test purchase (refund eventually issued)
Update: I have now received a full refund.
For context, I discovered multiple recurring charges of £39.99 on my credit card following an IQ test purchase. When I first contacted support requesting a refund for the charges, I was told refunds were not possible under their policy. After I posted a public Trustpilot review, the company reached out and processed a full refund.
I appreciate that the refund was eventually issued once the matter was escalated.
For transparency, this is the full story of issues I encountered:
• The confirmation communications referenced different pricing structures. One email stated a $0.99 trial followed by $19.99 charges every 7 days, which I initially interpreted as a monthly charge rather than weekly. A separate automated message then referred to a 4-week subscription price of $39.99.
• My actual card charges were recurring £39.99 payments.
• The website did not provide clear visibility of payment history, which made it difficult to identify the full number of charges.
• Locating the cancellation option was not straightforward.
• My initial refund request (as I hadn’t used the product beyond the initial IQ test) was declined, and the refund was only approved after the issue became public.
Based on my experience, I would encourage anyone who has used this service to review the terms carefully, including all confirmation emails, and to check their bank statements.
Reply from Cerebrum2026-02-25
Dear Elene Ghelaghutashvili, 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 ELENEGHELAGHUTASHVILI195578 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
A
April Sterner · 2 reviews · Experienced 2026-02-24 ·
★★★★★
There’s no way to cancel this…
There’s no way to cancel this subscription! This site conveniently doesn’t recognize your email when you try to log back in to cancel. I’ve submitted a request via email asking how to cancel. Of course I got no response.
Reply from Cerebrum2026-02-25
Dear April Sterner, 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 APRILSTERNER307773 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
D
De las nieves · 1 review · Verified · Experienced 2026-02-25 ·
★★★★★
Fácil y entendible.
Reply from Cerebrum2026-02-25
Dear De las nieves, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Z
Ziya · 2 reviews · Experienced 2026-02-24 ·
★★★★★
so disappointed in myself
so disappointed in myself, i’m a young carer who gets provided money to go school and buy food for me and my sick nan. i was messing with my friends and we decided to take an iq test for what we thought was just a small fee of 1 pound until a month later 30 pound which is my travel money for the week was taken out of my account from the company myiq which ive heard that this is the parent company i’m currently contacting the bank and praying for refund
Reply from Cerebrum2026-02-24
Dear Ziya, 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 ZIYA104592 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
j
john · 1 review · Verified · Experienced 2026-02-23 ·
★★★★★
quick feedback on results
Reply from Cerebrum2026-02-23
Dear john, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
R
Richard Cowie · 6 reviews · Experienced 2025-09-17 ·
★★★★★
Scammed!!!
I'm always trying out new IQ tests and being offered a low cost of 50pence with cerebrum, I did it and if there was any more cost I would not continue... so as a recovering stroke victim, I was not keeping track of my bank account properly...then feeling better I was shocked to see multiple £29.99 withdrawals by them...must be a SCAM , I've now hopefully cancelled through there system, fingers crossed, if not it's off to the lawyers. 🤬
Reply from Cerebrum2026-02-23
Dear Richard Cowie, 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 RICHARDCOWIE780847 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
R
Roy · 6 reviews · Experienced 2026-02-20 ·
★★★★★
Cerebrum Iq
Great app
Had a few issues although Alex was prompt with his response and resolved any problems i had.
Reply from Cerebrum2026-02-22
Dear Roy, 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 ROY735060 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
J
Jason Morris · 2 reviews · Experienced 2026-02-21 ·
★★★★★
THIS IS A SCAM....
THIS IS A SCAM....
I PAID £0.99 FOR A REPORT AND NOW THEY HAVE CHARGED ME £29.99 FOR A SUBSCRIPTION WHICH I DIDN'T SIGN UP TO. I AM REPORTING THIS TO MY BANK, THE POLICE AND WHOMEVER I POSSIBLY CAN AS IT IS FRAUD.
CEREBRUM IF YOU ARE READING THIS YOU NEED TO REFUND ME IMMEDIATELY AS I CANNOT FIND A WAY TO UNSUBSCRIBE....
Reply from Cerebrum2026-02-22
Dear Jason Morris, 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 JASONMORRIS482634 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
s
sam red · 1 review · Experienced 2026-02-20 ·
★★★★★
Scam
Payed 1$ for the iq test didn’t realize it was including a subscription for 12.99 a month and i just noticed it and now magically my account doesn’t exist so I can’t cancel it. I’ll be contacting my bank to tell them to stop authorizing payment to this company.
Reply from Cerebrum2026-02-21
Dear sam red, 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 SAMRED957892 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
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 authorise the weekly payment and did not notice it for months, after which they had charged me hundreds of euros.
I’m demanding a refund for all the money they took from my account.
UPDATE
After contacting the company, they issued a full refund in a very timely manner. I must admit their customer service was excellent.
Reply from Cerebrum2026-02-21
Dear Tadhg Kennedy, 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 TADHGKENNEDY311976 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
K
Kfir Gold · 2 reviews · Experienced 2026-02-19 ·
★★★★★
SCAM APP DO NOT BUY ANYTHING FROM THEM OR THEIR DAUGHTER COMPANIES
Use Myiq their daughter company Couldn’t deny subscription as both options put you on it and then couldn’t cancel it. Got scammed out of 59.98 recurring payments. Do not buy anything or they will charge you an insane payment you didn’t want or cancelled and their customer service is just a bot who won’t help you at all
Update – Feb 24: I have received the refund but still firmly believe you should view other reviews of this company online as it is still known for scams
Reply from Cerebrum2026-02-20
Dear Kfir Gold, 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 KFIRGOLD561789 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
I
Ian Malcolm · 2 reviews · Experienced 2026-02-19 ·
★★★★★
I WAS SCAMMED!! IT WAS A BAIT-AND-SWITCH
I am extremely disappointed with my experience. I was led to believe I was paying a one-time nominal fee for an IQ report, but instead, I was enrolled in a hidden subscription without my clear consent and charged $44.99.
As a Canadian consumer, I am protected against these types of deceptive "negative option" billing practices. I have already contacted my bank to dispute the charge and am filing reports with the Competition Bureau of Canada and the Canadian Anti-Fraud Centre (CAFC).
I am demanding an immediate and full refund of $44.99 and for my account to be permanently closed. I will update this review once a full refund has been issued to my original payment method.
Reply from Cerebrum2026-02-20
Dear Ian Malcolm, 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 IANMALCOLM908121 as it will allow us to quickly identify your account and ensure this is handled promptly.
Thank you! Cerebrum IQ Team
