Intuition Check.

Your results can shift with your state and your circumstances, so it helps to know what might be in play before you read too much into any single number. None of the following is a settled fact — they are possibilities worth noticing as you experiment.

There's another pattern worth watching: the values themselves. When choosing, people often lean toward some values and avoid others — rarely as evenly as they imagine. And you might find you guess some values right far more often than others — and some almost never — even ones you pick just as much. One reading is that intuition can favour or avoid particular values on its own, apart from what you choose. The app's per-value breakdown lets you see both — how often you pick each value as your guess, and how often each is guessed right.

Choose a guess set — cards, numbers, one of the ready-made sets, or one of your own. Take your guess. Reveal the value and see whether you were right. Repeat. Or switch to Quick pick: every value of the set laid out in one grid — tap your guess. Or, in active mode, play a Series: will one value, and a single tap draws a whole run of random values to score against it.

You don't have to supply your own pictures to get started. Five ready-made image sets ship inside the app — including the classic Zener cards.

Adding one gives you your own copy, and from then on it behaves like any other guess set: rename it, leave images out of the guessing, reorder them, send the set to a partner, or export it as a file.

Each set also carries its own “?” cover — shown below with a dashed outline — which is what you see while the value is still hidden. It is never one of the answers.

Every round you mark turns into data. Instead of just counting hits, the app compares your results to the exact odds a random guesser would face for the same number of possible values — and tells you, in plain language, whether you are genuinely ahead or still within what chance would give.

Intuition Check does not collect any personal data. There are no accounts and no analytics. Your settings and your photos are saved locally on your device, and your guess statistics are kept between launches only if you choose to save them — off by default.

In the partner game, your device uses Apple's Network framework to talk directly to the other device over the local network. The data exchanged is limited to the device name the operating system reports and a random identifier for this installation, the round state (value chosen, guess made, reveal) — and, if you play with one of your image sets, the set itself, sent directly to your partner's device. The app sends none of it to us — and we run no servers that could receive it.

Playing card artwork by Adrian Kennard, released under CC0 Public Domain. Generator and source at me.uk/cards.

Intuition Check is free to download and comes with 1 hour of in-app time to try the whole app — the Zodiac set is a separate purchase. That hour counts only while you are actually using the app, and it adds up across all your sessions — no clock runs while the app is closed. If it runs out before you have decided, the subscription view lets you reset the counter for another hour, up to 3 times — 4 hours of free time in all.

To keep playing after that, there is one subscription with two plans, monthly or yearly. The subscription view shows the price of each plan, and Apple asks you to confirm it before anything is charged. It is Family Sharing–enabled, so you and up to five family members can use it. You can cancel it at any time in the app, under Settings → Subscription → Manage subscription, or on iPhone and iPad in the Settings app: Settings → Apple Account → Subscriptions.

The subscription covers the whole app — both modes, your own guess sets and the free ready-made ones, partner play and statistics. Subscriptions with additional features may be added in the future; everything this subscription includes stays included.

Separately from the subscription:

• the paid Zodiac guess set
• a way to say thank you with money