What Instinctle is
Instinctle is a free daily with five short tests of visual and timing instinct: Crossing, Stretch, Vanish, Between, and Aftertone. You get a total out of 500, a letter grade, and a streak. The scoring formulas are published, including the initial tolerance and sigma values. Reveals stay on screen until you move on. Dragged answers are confirmed with a button, not by lifting your finger. Between always has a visual flash, so it stays playable when the sound is off.
This page is a description of Instinctle. It is not an official Perceptle page, and we do not embed Perceptle or publish anyone else’s daily answers.
How it differs
The five tests were designed for this site. They are not Perceptle’s Count, Track, Angle, Tempo, or Split, and they are not Freehand’s set either. Instinctle’s total is a straightforward sum of five 0–100 scores, not an average folded back into a single 0–100. The How to play page writes the curves out in full.
If you came here from a search for ‘games like Perceptle’, you are welcome to play. Please know that Instinctle is an independent project. It is not affiliated with, endorsed by, or a substitute for Perceptle.
You may also want the published scoring formulas, unlimited practice, a shorter Perceptle alternative note, or what unlimited means here.
A few things you might wonder
Is Instinctle the same as Perceptle or Freehand?
No. Instinctle is an independent daily perception game with five original tests, its own scoring, and its own visual style. It is not affiliated with, endorsed by, or a copy of Perceptle or Freehand.
How is my score calculated?
Each test scores 0–100 on a published curve with a small perfect-score window, then a smooth falloff. Pointing tests use a Gaussian on the distance to the true point. Stretch uses a log-ratio, so twice as long and half as long score the same (36). Between uses milliseconds, Aftertone uses lightness points. The constants are initial design values, labelled as such on the How to play page, and will be frozen after an internal playtest. Five tests make a total out of 500.
When does the daily puzzle change?
At midnight in the eastern United States (America/New_York), including daylight-saving changes. Unlimited practice is available at any time and does not change your daily score or streak. Replaying a past day from the archive also leaves today’s official score alone.
Do I need an account? Where is my streak kept?
No account is required. Your daily scores, streak, and best total are saved in this browser on this device. Clearing the site’s data will reset them. Switching devices will not carry them over.
Can I play Between with the sound off?
Yes. Between’s main cue is a pair of visual flashes. A short optional beep can sit on top, but the flashes, the interval, and the scoring are unchanged when the site is muted or the device is silent.
Is this a medical vision or hearing test?
No. Instinctle is a casual daily game about perceptual instinct. It is not a clinical test, a diagnosis, or a substitute for professional care.