Synapse v2
// Study OS · Offline-First · No Account Needed
A complete study operating system packed into one HTML file. Open it in any browser. Work offline. No login, no subscription, no tracking. Five evidence-based study tools, XP rank progression, and optional AI planning via your own Gemini key.
// one-time purchase — download & keep forever
Five Weapons. Zero Excuses.
Every tool in Synapse is built on cognitive science. No passive review. No highlighting. Just the methods that actually transfer knowledge into long-term memory.
Lock in with a configurable Pomodoro timer. Set your focus and break intervals, start a session, and earn XP every time you complete a block. Distraction-resistant by design.
+15 XP / sessionBuild your own flashcard decks and work through them using the Leitner 5-box spaced repetition system. Cards move between boxes based on your answers. The algorithm does the scheduling.
+8 XP / roundPick a topic, set a timer, and write everything you know without looking at your notes. BrainDump is active recall in its purest form — and one of the most underrated revision methods in existence.
+10 XP / dumpBuild your own question bank with multiple-choice answers, then run Boss Fights against your own material. Pass the fight for a bonus XP drop. Fail and you know exactly what to revisit.
+5 XP / correct · +20 XP pass bonusTrack your XP, streak, session count, and rank progression from NPC all the way to System Admin. Export your data as JSON to back it up or migrate between devices. Import to restore.
Ranks: NPC → Script Kiddie → Glitch Tech → Netrunner → System AdminMission Architect
Synapse includes a built-in AI study planner powered by Google Gemini — using your own API key. No middleman. No subscription markup. Just paste your key once and get personalised 3-step study missions for any subject.
Why Synapse?
Study apps usually require an account, an internet connection, a subscription, or all three. Synapse requires none of the above.
Works with no internet connection. Load it once and study anywhere — flights, libraries, exam halls.
No email. No password. No sign-up. Open the file, hit Jack In, and start. Your data lives in your browser.
The entire app is one HTML file. Open it in Chrome, Safari, Firefox, or Edge. Share it. Back it up. It just works.
AI features use your own Gemini key, stored locally. You pay nothing extra. No rate limits from us.
Export your full study history as JSON. Switch devices or browsers without losing a single XP point.
Every tool maps to a proven cognitive science method. No filler. No passive review. No vibes.
Up and Running in 30 Seconds
No install wizard. No npm. No Docker. Just a file.
Complete checkout on Gumroad. You get immediate access to download the HTML file.
Save synapse.html anywhere on your device. Desktop, Downloads, USB — your call.
Double-click the file. It opens in your default browser. No server, no setup, no nothing.
Jack In, pick a tool, and get to work. Everything saves automatically to your browser.
Ready to Jack In?
One file. Five study weapons. Optional AI. No subscriptions, no accounts, no internet required. Buy once, keep forever. Updates included.
// one-time purchase — no recurring fees — updates included