How We Test AI Tools for Students

By Leo Chen · Last reviewed September 2026

Every tool listed on this site has been checked against the same standard before it appears, and re-checked after. Not skimmed from a press release, not copied from another roundup. This page sets out exactly what that standard is, so you can decide how much weight to give our reviews.

If you only read one section, read What "free" actually means here. That single rule is the reason this site exists.

Who does the checking

StudyAI Hub is run by one person: Leo Chen, second-year student in computer science and economics. I use AI tools daily for problem sets, lecture notes, literature searches and lab reports, and I got tired of roundups that listed "free" tools which turned out to want a card number. This site started as a spreadsheet I kept for myself.

There is no content team, and no listing here is written from a vendor's marketing page. Reviews are edited before publication, and every one carries a stated limitation.

What every listing has to pass

A tool earns a place on the site only after clearing all five of these:

1. A signup that doesn't demand a card. I register with an ordinary account and see how far I get before something is asked for. If the first genuinely useful feature sits behind a credit card, the tool is labelled paid — whatever its marketing page calls it.
2. A real task, not a demo prompt. Tools for writing, research, notes or maths get run against actual coursework: a real essay draft, a real problem set, a real recorded lecture. Showcase examples don't count.
3. Free-tier limits written down. How many messages, minutes, uploads or documents you get before the wall, and what happens when you hit it. If the limit isn't documented anywhere by the vendor, I find it by hitting it.
4. Student pricing verified at the source. Discount claims are checked on the vendor's own pricing or education page, never on a coupon blog. Offers that require a US .edu address are flagged as such, because most of the world can't use them.
5. Honest limitations listed. Every listing carries a "watch out for" line. A tool with no downsides written down has not been used properly.

What "free" actually means here

"Free" is the most abused word in this category, so the site uses three labels and nothing in between:

• Free — the core job can be done indefinitely with no payment and no card details. Genuinely costs nothing.
• Freemium — there is a usable free tier, but you will hit a limit on anything serious: message caps, document caps, watermarks, export restrictions.
• Free for students — free only if you can prove student status, usually with a school email address or a verification service.

Anything offering only a 7-day or 14-day trial is labelled Paid. A trial is not a free plan, and pretending otherwise is the single most common trick in this niche. Applying that one rule removes more tools from consideration than any other.

How ratings work

Ratings run from 1 to 5 stars and answer one question: how useful is this to a student who is not paying? A tool that is excellent on a $20/month plan and crippled on the free one cannot score highly here, however good the paid version is. Where an upgrade is the only route to a feature students actually need, the review says so instead of quietly leaving it out.

How often listings change

Every listing is re-checked monthly for pricing changes, free-tier shrinkage and dead links. When a tool stops working, gets acquired, or moves its free tier behind a wall, it is removed rather than left up with a stale review. The date at the top of each page is the date of the last full pass.

How this site makes money

This site may earn a commission if you sign up for a paid plan through some outbound links, at no extra cost to you. That money pays for the accounts and subscriptions used in checking tools.

It does not buy placement. Star ratings and ordering are not for sale at any price, and if that ever changes, this page will say so in plain language before it happens.

What we don't do

• We don't accept payment, gifts or upgraded accounts in exchange for a listing or a rating.
• We don't review a tool nobody here has opened.
• We don't keep a listing alive because a company asked us to.
• We don't repeat other roundups. If a claim isn't verified here, it doesn't go up.

Corrections

Prices move, free tiers shrink and links rot. If something on this site is out of date or wrong, tell us and it gets fixed on the page — not quietly deleted. Corrections are logged, and a listing that repeatedly fails re-checking is removed for good.

Questions about the process, or a tool we should look at? Get in touch. To see who is behind this and why it exists, read about this site.