What free is genuinely good for
Learning the deck. If you want to know what the Eight of Cups means upright and reversed, a free app or a free website will tell you, and it will tell you roughly as well as a paid one. Card meanings are not proprietary. They have been written down for two centuries.
Trying the format. Nobody should pay to find out whether they like reading tarot on a screen. If a tool will not let you have a real reading without a card number, that is a reason to leave rather than to pay.
Occasional use. If you pull a card in February and think about it for ten minutes, you do not need a subscription. You need ten minutes.
What you pay with instead of money
Attention, usually. Advertising is the standard model, and it works by interrupting you, which is a strange thing to accept in the middle of something reflective.
Data, sometimes. Read what the app says it does with what you type. A tarot question is often the most private sentence a person writes that week: about a relationship, an illness, a resignation. Handing that to an ad network is a real transaction even though no money moves.
Depth, almost always. Free tiers tend to run shorter prompts against cheaper models, because generation costs money on every reading. The output is not usually wrong. It is thinner.
The limitation nobody mentions until later
Most free tools keep nothing. You get a reading, you close the tab, and it is gone. That feels like nothing at the time, because the value seemed to be in the reading itself.
It shows up three months later, when you half-remember a reading about the same problem and cannot find it. The pattern you would have seen, the same card arriving at the same kind of moment, is the part you cannot reconstruct from memory. It was never stored, so it never existed.
This is the honest case for paying for anything in this category, and it has nothing to do with better writing. You are buying continuity.
Signs a free tool is wasting your time
The reading could have been about anyone. If nothing in it could have been false for you, it told you nothing.
You cannot get back to it. No account, no link, no export.
It predicts. A tool announcing what will happen in your career in the next three months is making a claim it cannot support, and the confidence is a warning rather than a feature.
It asks for a card before it gives you anything. A tool sure of its value lets you see the value first.
The question that decides it
Do you go back to what you wrote? Not do you intend to. Do you.
If you have ever reread an old journal entry, a paid tool will probably earn its place, because the thing it sells is a record that accumulates. If you never have, stay free, and spend the money on a deck you like the feel of.