This tool forecasts memory with forgetting-curve maths. Enter a memory strength and it shows predicted retention over days, plus the day your recall is expected to fall near 80 percent, which is a sensible time to review.
Why it helps. Studying works best when you do something active with the material instead of only reading it again. This spaced repetition forgetting curve forecast turns a vague plan into a clear next step. You spend less time deciding what to do and more time actually learning. It runs fully in your browser, and nothing you type is sent to a server or saved anywhere unless the tool itself says so.
How to use it
- Estimate your memory strength in days: use 2 for new material, 5 for familiar material, 10 for well-learned material.
- Choose how many days to forecast.
- Press the button to see the retention table.
- Schedule your next review near the day retention hits 80 percent.
Worked example
With strength 5, retention after 7 days is about 25 percent, and the tool suggests reviewing in about 2 days to stay near 80 percent. That gap between feeling and maths is exactly why scheduled review beats guessing.
Honest limits
This is a simple exponential model, not a measurement of your brain. Real retention depends on sleep, prior knowledge and how deeply you first learned the material.
Study tips that make it work
Re-test yourself at the suggested review day and adjust the strength up or down. Your own scores calibrate the model better than any default.
Use the tool in short, focused sessions. Twenty-five to fifty minutes of real work beats three hours of half-reading. After each session, write down one thing you still cannot explain in your own words, and make that the first job of your next session. Small daily steps build stronger memory than one long weekend cram, and a tool like this is only useful if you return to it often.
Who this is for
This tool suits school students, university students and adult learners who study on their own. It also suits tutors who want a quick, free activity for a study session without setting up accounts or software. If you study with a group, run the tool on a shared screen and work through the output together, because talking through results out loud is itself a strong study technique. The tool asks for nothing about you, so it works just as well for a first-year student as for someone returning to study after years away.
Common mistakes to avoid
The most common mistake is running the tool once and never returning. A single use produces a nice output and no learning. The second mistake is feeding it vague input: vague tasks, vague notes and vague lists produce vague outputs, and the tool cannot fix input it cannot see. The third mistake is trusting the output without checking it. Always read the result, compare it with your notes, and correct anything that looks wrong before you study from it. A tool supports your judgement; it does not replace it.
Try this in the next seven days
On day one, run the tool once with real material from your current topic, not a test sentence. On day two, use the output in a real study session and note what worked and what did not. On day four, run it again with fresh material and compare the two outputs. By day seven, decide whether this tool earns a place in your weekly routine or whether a different tool from this site fits better. Keeping only the tools you actually reuse is how a study system stays light enough to survive a busy term.
Frequently asked questions
Is it really free? Yes. The tool runs in your browser with no account, no sign-up and no payment.
Does it save my work? No, unless the tool description says it saves locally in your browser. Copy anything you want to keep into your own notes.
Can I use it on my phone? Yes. The tool works on phones, tablets and computers with a modern browser.
Versión en español: https://ilmhunt.com/pronostico-de-curva-del-olvido/