Reading finish planner
Turn a book into a realistic daily reading commitment. Compare a short daily session with a longer session before choosing a finish date.
Learning and planning
Browse practical tools, sky models and country-specific scenarios. Each tool explains its method and limitations.
How it works
Turn a book into a realistic daily reading commitment. Compare a short daily session with a longer session before choosing a finish date. Give each new topic a sequence of future review dates. Export the dates to your calendar and adapt the intervals when a subject needs more practice.
Select a country independently of the interface language. Rates and fees are supplied by you unless an official dated source is explicitly stated.
Spaced repetition calendar
Give each new topic a sequence of future review dates. Export the dates to your calendar and adapt the intervals when a subject needs more practice.
Exam topic planner
Check whether the work on your exam list fits into your available days. Unscheduled hours identify a capacity gap rather than a personal failure.
Video course planner
Account for both watching and practicing when planning a video course. Faster playback reduces viewing time, but it does not remove the time needed for exercises.
Vocabulary goal planner
See how new vocabulary creates a growing review workload. Reduce your daily target if the later review peaks become difficult to sustain.
Writing progress planner
Divide the remaining words in a draft among your available writing days. The daily target counts output only; editing and research need their own time.
Typing speed and accuracy
Measure speed together with accuracy on a passage you choose. Use the same passage and similar conditions when comparing your own practice sessions.
Mental arithmetic trainer
Practice addition, subtraction or multiplication with an adjustable question set. Review missed answers without treating the score as a measure of intelligence.
Personal study cards
Turn your own question and answer pairs into revealable study cards. Mark each review honestly to see which material needs another pass.
Prediction calibration
Compare stated probabilities with recorded outcomes. A confident wrong prediction contributes more error than a cautious one; a few events are not enough to establish forecasting skill.
ISO week date explorer
Find the ISO week year, week number and weekday, including dates near New Year that belong to a different week year.
Weighted decision matrix
Compare options against criteria you choose. Give higher scores to more desirable outcomes, including lower costs if cost is a criterion.
Focus session interruption analysis
Review planned focus sessions and the time you recorded as interruptions. Compare sessions without assigning a productivity or health diagnosis.
Japanese era date
Display a Gregorian calendar date using the japanese calendar supported by your browser. This tool converts from Gregorian dates; it does not infer personal traits.
Gregorian to Hebrew calendar date
Display a Gregorian calendar date using the hebrew calendar supported by your browser. This tool converts from Gregorian dates; it does not infer personal traits.
Gregorian to Persian calendar date
Display a Gregorian calendar date using the persian calendar supported by your browser. This tool converts from Gregorian dates; it does not infer personal traits.
Chinese lunisolar date
Display a Gregorian calendar date using the chinese calendar supported by your browser. This tool converts from Gregorian dates; it does not infer personal traits.
Energy and activity reflection log
Compare your own before-and-after energy ratings by activity. Treat the log as a reflection aid, not evidence that an activity caused a medical change.
Decision expectation review
Preserve what you expected, compare it with your later rating and record a lesson without rewriting the original expectation.
Goal time budget conflicts
Check whether several goals fit into the same weekly time budget, including the minimum time you consider useful for each.
Information source review checklist
List which source checks you have completed and which remain open. A completed checklist does not certify that a claim is true.
Birthday across calendar systems
Compare the same Gregorian civil date in several calendars, without treating calendar labels as personality or destiny indicators.
Gregorian anniversary planner
List upcoming Gregorian anniversaries and explicitly flag leap-day dates that do not exist in a target year.
Sixty-pair stem and branch cycle
Explore the repeating sixty-pair cycle from its 1984 Jia-Zi reference. This year table does not assign a birth-date pillar.
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