OP, love the idea, and cool to see a useful PWA!

One note: I noticed when opening the installed PWA in airplane mode, styles didn't load. You might be interested in this article on PWA caching from MDN:

https://developer.mozilla.org/en-US/docs/Web/Progressive_web...

Please share https://www.bogleheads.org/wiki/Getting_started with your son.

you need to add the meta utf8 tag

I hope that @roberdam reads this and implements those into his PWA.

OP, enabling: - deposits (and withdrawals) - a matching logic (which we can do manually I guess, by doubling the deposit amount) - and correct calculation of compounding (if I had $100 for 11 months and add $100 in december, I shouldn't see the value compound $200 for the whole year)

would be great.

Bonus points if there was some kind of password (even hardcoded) so that the kids can't just click the gear icon and write themselves a blank check of $1,000,000

> I explained to my kids that investing is like having a magic box that generates more money over time.

That is wildly misleading. Investing is super important, but it shouldn't be described in this fairy-tale way. Young people might be misled into trusting investment advisors/counselors/brokers, whose real goal is to enrich themselves at your expense. In fact, there are adults who haven't yet learned this.

An article about investing that doesn't mention the WSJ dartboard contest isn't worth reading -- essentially, over 14 years, random stock picks produced returns equal to those of stockbrokers, before the stockbroker's fees and other costs were subtracted.

An investment counselor's primary goal is to make you think you need his services. His secondary goes is to keep you from performing your own research to discover that is false.

> meanwhile they can withdraw at any time

How does the withdraw work? You manually reset the date to today and the amount to what it was last time you saw it minus the withdrawal?

There's an awful lot of negativity here, but as someone who's 55 and has earned a good wage since I was 17, I really wish I had taken investing more seriously from the very beginning. While I knew of compound interest, I really didn't understand it until like a decade ago. If I'd started putting 5% of my money into a target retirement plan from 17, I'd be retired now. As it is I'm not doing badly, but I really wish I'd started earlier.

So I say: Good on you.

Somewhat related: I just got my son set up with a custodial account and put his "kid retirement" plan into it, and let him pick a couple stocks to put some money into, and put the majority of it into target retirement and a few stocks and EFTs, so he can get some ideas of how they perform, make it a little fun with picking things he's into, and also follow ups and downs of the market, all of which I think is good education.

The screen is the biggest consumer imho.

I mean of course I understand that the phone can be removed by the suction mount, but thus also defeats the idle infotainment concept.

Also seen screen burn in...

I had a very similar idea this summer. But my kids are 6 and 8, so I approached it using the video game approach. It's been an absolute smash hit and entirely altered the habits of doing chores in this home. It's been about 3 months and it's still going stronger than ever. The whole thing is a static page, driven by a Google Spreadsheet that Mom and I edit to adjust goals and track progress.

https://ibb.co/RTw5sCDJhttps://ibb.co/ycRB8750https://ibb.co/gLGQ0tKT