sooo I went through this last year too!! i was literally in the same boat trying to learn during my commute. honestly it's pretty tough to find high-quality stuff that doesn't cost a fortune but i found a few gems that actually helped me understand the logic without needing a desktop. heres what i used:
* Mimo: Learn Coding/HTML/JS - their python path is super duolingo-esque and great for basics.
* Enki: Learn to code & AI - i think this one is the best for actual technical insights into ML concepts.
* Brilliant.org - the free lessons on computer science are literally amazing for visualizing how neural nets work. it kinda feels like slow progress at first but it definitely adds up after a few weeks. good luck with the career pivot!! it's a grind but totally worth it imo. peace

sooo i totally get the struggle... coming back to this an hour later cuz i remembered how much i hated those chatgpt wrappers lol. i went through this last year when i was trying to understand backpropagation while sitting on a packed bus every morning. tbh it felt impossible until i found a few specific tools that actually worked on a small screen without costing a fortune. basically, here is what worked for my budget-conscious pivot journey: 1. Enki: Learn Code & AI Skills - this was my go-to. the free tier is actually decent and it teaches the logic of machine learning algorithms without being too "fluffy." it feels like duolingo but for actual tech skills. 2. Brilliant.org - i know it has a sub, but their daily "foundations" paths are often accessible and they are amazing for visualising how neural networks function. seriously, the interactive graphs are 10/10 for understanding the "why."
3. Pydroid 3 - IDE for Python 3 - if ur on android, this is a lifesaver. i would copy snippets from tutorials and run them right there on the train to see what happens when u change a weight or a variable. 4. Kaggle - okay, not technically a dedicated app, but their mobile-optimized micro-courses on "Intro to AI Ethics" and "Deep Learning" are completely free and way higher quality than most paid apps i've seen. the biggest thing i learned is that u dont need a desktop to understand the math, but u do need a way to break the logic down into 5-minute chunks. it's all about consistency. gl with the commute study sessions!! peace

Good to know!

hey, i feel u on the train commute struggle!! I spent like three years trying to learn tech basics while commuting, so I've basically tried every app out there. Honestly, it's totally doable if u pick the right tools, tho it's kinda tough at first. Here's what I recommend based on what worked for me: * Enki: Learn Data Science, Coding, & AI – This is lowkey the closest thing to Duolingo for tech. It has paths for AI and machine learning that feel very bite-sized. I've used it for a long time and the free daily drills are actually pretty high quality.
* Mimo: Learn to Code and AI – Seriously great for Python. It lets u run small snippets of code right on ur phone, which is huge for learning the 'how' without a laptop. * DataCamp: Learn Data Science – I'd be careful with the full subscription cuz it can get pricey, but their free daily "practice" sessions are good for testing urself on the go. One thing I've learned... maybe dont try to master neural networks on day one? It's wayyy too overwhelming. I would suggest sticking to the Python fundamentals first cuz everything else builds on that. I guess the biggest lesson is just consistency... even 15 mins on a delayed train counts!! But yeah, those apps should definitely get u started without a massive paywall. gl! 👍

Sooo, I’ve been analyzing the market lately because I’m also trying to stay updated without breaking the bank. tbh, the "AI study app" space is basically split between "edu-tainment" apps that feel like games and the "heavy hitters" that are more about professional certifications. I’ve noticed a lot of the older free gems are getting paywalled now because the demand for AI knowledge is just skyrocketing. iirc, Programming Hub used to be the gold standard for free bite-sized stuff, but their monetization has gotten a lot more aggressive lately. I’m curious though—are you more interested in the actual coding part (like writing Python scripts on your phone) or the high-level architecture of how things like Transformers or LLMs actually work? If you want a different angle, DataCamp actually has a pretty solid mobile app. They are a huge brand in the space, and while the full desktop stuff is expensive, their mobile "Daily Practice" is actually free and great for retention. Also, definitely check out Khan Academy. It’s 100% free and their new AI-related lessons are actually really high quality, even if the UI isn't as flashy as Duolingo.