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.
Be careful this app only wants more of your money.
Dear Scott, 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 SCOTT590148 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
They are very deceptive. Charged me 24.99 after I cancelled my subscription. I cancelled it 4 days ago and today they took the money out of my account. Didn't trust this company. I would give them zero stars if I could
Dear Cyndi Fontenot, 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 CYNDIFONTENOT529712 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Cerebrum IQ is double-charging through sister sites MyIQ and GeniusIQ. I paid for a $1 test and was hit with two $30 charges. MyIQ confirmed they would refund, but GeniusIQ is stalling. Refund me for both immediately or I am filing a formal bank dispute and FTC report.
Dear Osama Abdikadir, We’ve sent a request via TrustPilot to identify you in our system. Once you provide your details, we’ll promptly process your refund within a few hours, as it has already been approved. Here's your reference number OSAMAABDIKADIR902663 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
I have decided to leave my initial review up, as I think it important for others to see my initial issue, their response on here, and then my final experience. So, after messaging Cerebrum, I was messaged back by three different people: James, David and Alex. I have to be honest, these guys were actually super-helpful! At first, every time I sent an email, David responded almost instantly! After toing and throwing, David must have passed it on and I was then contacted by James and Alex. These guys were very helpful and resolved my initial issue. To be fair, I can not fault their customer service - it's actually one of the best I have received! My advice is to reach out to them - they are responsive. Thank you to the three that helped me.
Dear Bella Peterson, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
The company fraudulently charged me a 30$ subscription after paying 1$ for the results of my IQ test. DO NOT USE! Read all fine print on all websites.
Dear Paul Fernandez, 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 PAULFERNANDEZ419965 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
I found this charge on my bank statement.. and I tried to log in.. I have no email linked.. I would like to think this is an honest mistake.
Dear eva gwinn, 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 EVAGWINN799050 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
I paid for a 50 cent test. They then charged my credit card 29.00! I am trying to get a refund. Crickets! This company seems like a scam.
Dear Mary shepardson, 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 MARYSHEPARDSON138651 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
My wife should have read the other reviews before paying 50 cents for a result, only to be charged a 24.99 subscription fee. I contacted support, providing images of her PayPal name, account information, and activity page showing she was charged only to get the response “can you provide your wife’s PayPal name and account information” FIVE TIMES! I don’t even know if I’ll be charged again next month because mysteriously they can not find her account. Total scam
Dear BJ, 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 BJ905720 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Billed an extra 24.99 without my consent. Had to have bank reverse it. Do no use
Dear Penny Withrow, 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 PENNYWITHROW120209 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Me divertí y analize la encuesta para mantener mi mente activa
Dear MARLEN MARTINEZ, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Buyer beware! I took what was advertised as an IQ test about a week ago & was charged a buck. I felt this to be reasonable. However, never in my wildest imagination did I expect to then be charged $24.99 out of the blue yesterday. (I discovered this just now upon checking my checking account.) What a scam! I NEVER, EVER signed up for ANY subscription! Shame on this company! I see that I’m not alone in this. I sure wish that I had read reviews BEFORE giving my husband’s PayPal information, otherwise I would not be in this mess—ugh! I only thought of it after the fact; I feel so duped—double ugh! I emailed the company for a full refund. We will see what happens. I am praying that this will be resolved quickly, as I don’t have money to be wasting on such nonsense. This company needs to be investigated for illegal practices—pure robbery! 🙏 (02/10/26) Here’s a quick update, folks. I went in circles with this company’s customer service via email. Of course they couldn’t find me in their system, although I gave ALL of the necessary information in order to cancel the subscription. I was assured that I wouldn’t be charged again, since I was not locatable. Naturally I didn’t believe this & contacted my bank. They put a stop payment on the charge, but since I was told that it would take four business days to go thru, I didn’t transfer any funds back into my checking account, as I knew that this devious company would try yet again to charge me since the initial charge hadn’t actually gone thru. (I was never expecting this to be automatically debited, so when the initial subscription amount hit, I didn’t have enough funds, therefore I didn’t pay after all—thank God!) I am glad that I waited on putting money back in, as during that time period, I saw that the company tried to charge me yet again, but it didn’t go thru because I had insufficient funds. I haven’t seen another charge from these predators because the hold is now in place. What a COMPLETE waste of time—between multiple back-and-forth emails to this business & then a couple of calls to the bank (one to place the hold & one to confirm that the hold was in place so that I could put money back into my account in order to pay bills.) I have only written a handful of reviews in my lifetime, & this is the first update, but I felt compelled to share this information in order to possibly save someone from this miserable headache! Take care & God bless, y’all! Let’s PRAY that this company is put out of business for deceptive & cunning business practices! 🙏
Dear Louisa Machain, 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 LOUISAMACHAIN982008 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Total Scam!! I did not know I would be charged a monthly $26.00 after paying a $2 fee for an IQ test. I cancelled my subscription and still got charged $26.00. This is a scam. This company is trying to get subscription revenue by fraudulently charging people.
Dear Erica C, 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 ERICAC992264 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Dear Saskya, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Total scam - they bait you with a cheap IQ test then sneak a subscription charge on you - BEWARE and Avoid!
Dear Daniel McMahon, 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 DANIELMCMAHON317611 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Agradables
Dear Richard Nuñez, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Agradable, divertida...
Dear ingrid. Preguntas claras., Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Discussed with them paid £1 for test results and I thought that was it then noticed they had been taking out £9.99 each month
Dear Denise Stribbling, 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 DENISESTRIBBLING357805 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Dear Isbelia Cuevas, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
Horrible experience, autobilling a subscription after paying 1$ for test results. I have now been billed for 30$ without my acceptance or knowledge. Horrible scam company stealing your money, please take your business elsewhere if you see this review. Company said they reached out to me regarding more details but I have recieved no messages yet and still waiting. Reached out to them once again via email and havent heard back. Horrible product, its a literal subscription scam with somehow even worse customer service support. Embarrassing. Edit: Company reached to me and proccessed a refund. Will update once refund is passed succesfully.
Dear Tomas Malata, 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 TOMASMALATA190280 as it will allow us to quickly identify your account and ensure this is handled promptly. Thank you! Cerebrum IQ Team
Concentración visual
Dear Maríana, Thank you for your wonderful review of CerebrumIQ! Your feedback means a lot to us. Best regards, CerebrumIQ
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