How this compares to other approaches

There are three broad schools of online typology testing. They are not interchangeable, and the differences explain most of the confusion people arrive here with.

DimensionPsyCoveDichotomy-style testsOpen function testsCurated function services
Underlying modelJungian eight-function model with Grant/Brownsword stack orderingFour-letter dichotomy scored on self-reported preferenceEight function scores derived from a Grant/Brownsword variantEight functions mapped onto a proprietary type grid
What you actually receiveA ranked eight-function profile, a stack map, and a mistype self-check against your previous resultOne four-letter label plus a long generic descriptionEight numeric scores with no type interpretationA function map plus a human-written reading
Reliability disclosureTest–retest consistency, confidence interval, and flat-profile warnings are shown on the result pageNo reliability figures publishedMethodology documented, no per-user confidence outputNot published
Result stabilityBuilt to be retested — the same profile should reproduce after 2–4 weeksFrequently shifts between sittings, which is the main source of user confusionStable scores but no label to anchor them toStable, but the mapping layer is not open
CostFree test and free stack map. Deep report is paid and clearly optional.Free test, paid profile upgradeFree, donation supportedPaid deep report
Data handlingEverything runs in your browser. No account, no upload, no server-side storage of your answers.Answers submitted to a serverRuns in browserAnswers submitted to a server

Other products are named as comparison references only. No questions, scoring rules, or norms from any other instrument are used on this site.

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The real test is whether a profile predicts your stress response and your blind spots well enough to be useful.

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