{
  "generatedAt": "2026-10-12T17:05:31.808Z",
  "page": "https://dyscalculia.io/changelog",
  "methodology": {
    "url": "https://dyscalculia.io/methodology",
    "lastChanged": "2026-10-06",
    "revisions": 1,
    "testUnchangedSince": "2026-09-29",
    "changelog": "https://dyscalculia.io/data/changelog.json"
  },
  "entries": [
    {
      "id": "statisticsDownloads",
      "date": "2026-10-10",
      "kind": "data",
      "subject": "Statistics downloads",
      "change": "Every figure on the dyscalculia statistics page can be downloaded as a CSV file, each chart as an image with an embed code. The compilation (text, tables, charts) is licensed CC BY 4.0; the figures themselves belong to the sources cited."
    },
    {
      "id": "indiex",
      "date": "2026-10-07",
      "kind": "site",
      "subject": "Who makes the site",
      "change": "The site now states that Dyscalculia.io is an Indiex product and names the other Indiex products in the footer: Fashio AI, The Face Analysis and Dyslexia Steps."
    },
    {
      "id": "statisticsPage",
      "date": "2026-10-06",
      "kind": "data",
      "subject": "Statistics page and assessment costs",
      "change": "Published the dyscalculia statistics page: every figure with its own data year and source; no global meta-analysis of prevalence was found, so the range of population studies is given instead. The page on how dyscalculia is assessed gained a cost and waiting-time table for each language's markets, with a source per row. 20 studies and official statistics and 49 cost sources were added to the reference list."
    },
    {
      "id": "sexRatio",
      "date": "2026-10-06",
      "kind": "correction",
      "subject": "Correction: boys and girls",
      "change": "The page on what dyscalculia is said that a large prevalence study found similar rates of impaired mathematics in both sexes. That study (Moll et al., 2014) found more girls than boys with arithmetic difficulties. The sentence now says that most population studies find similar rates, that this German study found more girls, and that differences depend on the criteria used."
    },
    {
      "id": "programReview",
      "date": "2026-10-06",
      "kind": "method",
      "subject": "Practice program: review and difficulty",
      "change": "Added spaced review and adaptive difficulty to the web program. Missed questions return the same day; dot patterns, ten-frames and sums up to 20 answered correctly return after 1, 3, 7 and 30 days. Within a level, difficulty moves one step up after quick, correct answers and one step down at 50% accuracy or less. A skill whose accuracy slips gets a refresh step in the daily plan."
    },
    {
      "id": "programClaims",
      "date": "2026-10-06",
      "kind": "correction",
      "subject": "Correction: what the program does",
      "change": "Before this change, pages described spaced review and difficulty that adapts, which the web program did not yet do, and gave the daily practice time as about five minutes or a few minutes. The claims were rewritten to say only what the code does, and every page now gives 5–10 minutes a day. The time for the test itself did not change."
    },
    {
      "id": "focusPriority",
      "date": "2026-10-06",
      "kind": "correction",
      "subject": "Correction: where practice starts",
      "change": "The program description said practice starts from the focus area of the test. On a new account only the first level of a world is open, so the plan gives the focus area priority among the open levels instead. The description was changed to say so."
    },
    {
      "id": "unitNames",
      "date": "2026-10-06",
      "kind": "correction",
      "subject": "Correction: program unit names",
      "change": "Three unit names taken from the app were renamed because they read as a clinical setting or as a free trial: \"Clinical Signal\" became \"Real-World Signals\", \"Hero's Trial\" became \"Hero's Challenge\" and \"Master Trial\" became \"Master Challenge\"."
    },
    {
      "id": "definition",
      "date": "2026-10-06",
      "kind": "correction",
      "subject": "Correction: how the site describes itself",
      "change": "One definition sentence is now used on every page, in the site's data and for AI assistants. The home page had described the result as a four-part profile, but the test measures three of the four skill areas; it now says the result shows a strength and a focus area. In Brazilian Portuguese, a phrase that reads as \"free trial\" was replaced, because the paid program has no trial."
    },
    {
      "id": "launch",
      "date": "2026-09-29",
      "kind": "site",
      "subject": "Launch",
      "change": "dyscalculia.io launched with the free 5-game test (21 items, the same items and scoring as the Android app) and the paid web program: $9.99 a month or $39.99 a year, no trial, the first 5 levels of each age world free with an account, payments by Creem, non-refundable."
    }
  ]
}