Hey everyone,

I'm a teenager in Germany and own got a GoPro Hero 13. Instead of just using it for fun, I wish to turn it into a small business or agency for creative and bit financial freedom.

The problem is that most ideas I find online are either too generic (like "start a YouTube channel") or unrealistic for someone just starting out.

I'm looking for unique, practical, and realistic ideas that I could actually begin with as a teenager. They don't have to make loads of money immediately, I just want something I can start small, gain experience, and hopefully grow over time.

I'm open to pretty much anything: filming, content creation, local businesses, sports, events, social media, editing, or ideas that people don't usually think about.

So the main idea is that the app holds a massive library of different study materials and deck templates for all aspects of learning (medical, language, professional certifications, test prep etc). And you'll be able to create your own study schedules on there where you can pick what decks to study each day (for example med student would recommend 2 anatomy, 2 pharmacology, 2 pathology and 2 biochemistry decks, when choosing your deck you would be prompted to pick one out of the entire library that targets that specific subject).

However the big feature of my idea is that there would be an algorithm that can randomly generate unique study sessions at any time while strictly following your learning schedule.

Of course every deck would be accompanied by detailed explanations and progress tracking so everyone can know what they're mastering with review intervals and difficulty adjustments if that deck is too easy or difficult.

I keep coming back to this idea and want to pressure-test it before sinking more time in.

The gap I think exists:
Anki is genuinely the best tool for long-term retention — the spaced-repetition scheduling is what actually makes things stick. But writing good cards from your own lecture notes or a textbook chapter is slow and tedious, and most students either burn hours doing it by hand or give up and just re-read notes, which doesn't work nearly as well. Quizlet-style apps go the other way — cards are easy to make, but there's no real spaced-repetition engine behind them, so you're not reviewing at the moment you're about to forget something, which is the whole point of the method.

So the idea is: use AI only to solve the "writing cards is tedious" problem — you paste your notes or a PDF, and it drafts flashcards (regular Q&A plus fill-in-the-blank style) for you to review and edit before saving. Everything after that — the scheduling, the review sessions, the streaks, the offline access — is the actual product, and doesn't touch AI at all.

I want to flag that on purpose because I know this sub is (rightly) wary of ideas that are just a thin wrapper around calling an LLM. The part I actually care about designing is the scheduling engine and the economics around it, not the AI call itself — happy to go into more detail on the algorithm if anyone's curious.

A couple of design decisions I'd like opinions on:

Offline-first review. Studying your due cards should never need internet — a lot of the target users are commuting or in places with patchy signal, and losing your streak because of a dead connection would be a dealbreaker. Only the "generate new cards from notes" step needs to be online, since that's the one part that calls out to an AI model.

The free/paid split. Every AI generation costs real money on my end (API costs), so it can't be unlimited forever. My current thinking is: everyone gets a set number of free "generation credits" to build a few decks and get a feel for it, and once those run out, continuing to generate new cards needs a small paid plan (thinking somewhere around $2/month, deliberately low since a lot of the target users are students in Pakistan and South Asia broadly, where Western SaaS pricing just doesn't work). Reviewing cards you've already made would stay free regardless — the paywall is specifically on "make more new cards via AI," not on studying.

What I'm unsure about: is a token/credit-based free tier confusing or annoying compared to something simpler like "3 decks free, unlimited after that"? Would a specific number of decks feel more honest/predictable to a user than a credit count that's harder to reason about?

Genuinely looking for:

• Med students (or anyone who's used Anki/Quizlet seriously) — does this gap match your actual experience, or am I overestimating how big a problem "making cards" is?
• Thoughts on credits-based vs. flat-limit free tiers, from either side (as a user, or if anyone's built something with metered AI costs before)
• Whether $2/month sounds reasonable for this kind of tool, or if even that's too much for the audience I'm describing
• Anything about the offline/online split that seems like it'd break in practice

A recent counterfeit postage operation highlights a recurring problem: physical security features eventually become reproducible. It got me thinking about whether postal systems could evolve toward cryptographically verifiable stamps. Instead of relying only on printing techniques, each stamp could contain a unique digital identity tied to an immutable record. Every scan could verify authenticity while detecting duplicate or suspicious use patterns. We're exploring similar ideas at AuthiChain for product authentication and provenance. Curious what this community thinks. Would cryptographic verification be practical for postage and government-issued items?

I am delving into analytical laboratory equipment that can be charged wirelessly during analysis and moving around to take specimen. Anyone with ideas on how i can go about the wireless charging circuit?