Insights

Short reads on the ideas inside the apps — learning science, document AI, privacy engineering and honest pricing.

Learning science

What is FSRS-5, and why does it beat SM-2?

Spaced repetition works because memory decays predictably — review at the right moment and retention compounds. SM-2, the algorithm Anki shipped for decades before adopting FSRS itself in 2025, schedules reviews with fixed multipliers and coarse grades. FSRS (Free Spaced Repetition Scheduler) models each memory's difficulty, stability and retrievability, then fits the schedule to how *you* actually forget. FSRS-5 is its current iteration: same deck work, measurably better recall per review. StudyG runs FSRS-5 natively — and imports your Anki .apkg decks if you're switching.

StudyG
Document AI

Why page-level citations matter more than smarter models

A fluent AI answer about your document is worthless if you can't check it. When a summarizer invents a clause or misreads a table, the failure mode is silent — you only notice after you've relied on it. Page-level citations change the trust model: every claim links to the exact page it came from, so verification takes seconds, not a re-read of 300 pages. It's the difference between 'AI said so' and 'AI showed me'. SeekerPDF and SI WorkHub cite every answer.

SeekerPDF
Privacy engineering

On-device AI vs cloud AI — an honest breakdown

Cloud models are smarter; on-device models are private. That trade-off is real, and pretending otherwise is marketing. The practical answer is routing: sensitive documents stay on-device (Apple Intelligence, on-device models, Ollama/LM Studio), and when you want frontier-model muscle you call the provider directly under *your* API key — no middleman service logging your prompts. Every Nousivo app ships this router. You pick the route per task, or pin 'on-device only' per document.

All apps
Pricing

The per-seat tax: why WorkHub costs $5.99/mo flat (or $9.99/mo for all 5 apps)

Monday, Asana and ClickUp price per seat — a model that quietly punishes small teams for growing. A 10-person team on a $14/seat tool pays $140/mo, forever. SI WorkHub Premium is $5.99/mo flat ($34.99/yr) — or $9.99/mo ($59.99/yr) for the entire 5-app Nousivo All-Access Suite Pass — because your data lives on your devices, not in a bloated SaaS cloud.

SI WorkHub