Studying is a memory problem
Most study time is spent rereading and highlighting, and most of that effort is lost within days. The research on what actually sticks is clear, consistent, and over a century old. Mnemo is built on it.
Forgetting is the default
In the 1880s, Hermann Ebbinghaus measured how quickly newly learned material fades. The shape he found, now called the forgetting curve, has been replicated many times since: retention drops steeply in the first days, then levels off at a low floor.
The fix is not heroic effort. Each well timed review interrupts the decay, and the curve flattens a little more every time. Reviewing right before you forget is dramatically more efficient than cramming after you already have.
Recall beats rereading
In a large review of learning techniques, Dunlosky and colleagues rated practice testing and distributed practice as the most broadly effective techniques studied. Rereading and highlighting, the two things most students do most, rated lowest.
The reason is simple: pulling an answer out of your memory strengthens it in a way that looking at the answer does not. A later meta-analysis by Rowland found the same pattern across hundreds of comparisons.
How Mnemo applies this
Spaced repetition, built in
Flashcards are scheduled with spaced repetition algorithms that bring each card back shortly before you would forget it. You grade your own recall, and the schedule adapts.
Retrieval, not rereading
Reviews always ask before they show. Keyboard driven grading keeps sessions fast enough to do daily, which is where spacing pays off.
Connected knowledge
Notes and mind maps live beside your cards. Organizing a topic spatially and in writing builds the structure that makes individual facts easier to retrieve.
A fair caveat: no app makes learning effortless, and the research describes averages, not guarantees. What software can do is make the effective techniques the path of least resistance. That is the goal here.
How Mnemo compares
Every tool below is genuinely good at what it focuses on. The honest difference is scope and model: Mnemo combines notes, spaced repetition, and mind maps in one free, open source, offline app.
| Mnemo | Anki | Quizlet | Notion | Obsidian | |
|---|---|---|---|---|---|
| Spaced repetition | Yes, multiple algorithms | Yes, excellent | Limited, partly paid | No | Via community plugins |
| Rich notes | Yes, block editor | Basic card editor | Basic | Yes, excellent | Yes, excellent |
| Mind maps | Yes, built in | No | No | No | Via community plugins |
| Offline, data stored locally | Yes, always | Yes | No, cloud based | No, cloud based | Yes |
| Local AI | In development, runs on your machine | No | Cloud AI features | Cloud AI, subscription | Via plugins, varies |
| Open source | Yes, Apache 2.0 | Yes, AGPL | No | No | No |
| Price | Free, no paid tier | Free on desktop, paid iOS app | Freemium with paywalls | Freemium | Free for personal use, paid sync |
| Ads | None | None | Ads on the free plan | None | None |
| Extensibility | Module system and theming, early | Large add-on ecosystem | No | API and integrations | Large plugin ecosystem |
Based on public information as of June 2026. If something here is wrong or outdated, please tell us and we will fix it.
Sources
- Ebbinghaus, H. (1885). Memory: A Contribution to Experimental Psychology.
- Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013). Improving students' learning with effective learning techniques. Psychological Science in the Public Interest, 14(1).
- Rowland, C. A. (2014). The effect of testing versus restudy on retention: A meta-analytic review of the testing effect. Psychological Bulletin, 140(6).